您当前的位置:首页?>?期刊摘要?>?中英文摘要

2016年第5期

时间:2016-05-03 11:26:00??来源:??作者:

?GDrag8879环亚手机|首页主页

江莉1,2,赵国庆1,李林1
(1. 西安电子科技大学电子工程学院,西安 7100712. 西安建筑科技大学信息与控制工程学院,西安 710055)
摘要:随着新体制雷达及复杂脉内调制方式的广泛应用,雷达信号调制分类与识别逐渐成为雷达侦察系统中的关键问题。通常截获信号总是存在多径干扰,导致现有调制分类算法的性能急剧下降。针对多径环境下复杂脉内调制雷达信号,研究了多径信号在模糊平面的特点,提出了一种基于高阶模糊函数与奇异值分解的特征提取方法,利用线性SVM(Support Vector Machine)分类器对不同类型的雷达信号进行调制分类。理论分析与仿真实验表明,提出的方法能够较好地抑制多径干扰的影响,在低信噪比环境下具有较高的识别率。
关键词:雷达信号;调制分类;多径环境;高阶时频分布
中图分类号:TN971????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-0997-06
Jiang Li1,2, Zhao Guoqing1, Li Lin1
(1. School of Electronic Engineering, Xidian University, Xi’an 710071, China;GDrag8879环亚手机|首页主页
2. School of Information and Control Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China)
Abstract:As the increasing application of intra-pulse modulations, modulation recognition of radar signals becomes difficult in radar reconnaissance systems. Usually, there are multipath interferences along with the intercepted signal. The conventional methods become slowdown because of the multipath interferences. Aiming at radar signals in multipath channel, a feature extraction method was proposed based on higher order ambiguity function (AF) and singular vector decomposition, adopting the linear support vector machine (SVM) classifier to determine the types of the intercepted radar signals. Theoretical analysis and simulation results show that the proposed method has good ability to suppress the influence of multipath interferences and good accurate rate at low signal to noise ratios.
Keywords: radar signal; modulation recognition; multipath channel; higher order time-frequency distribution
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于动态行为建模的CPS计算实体建模方法
叶枫,夏阳,申朝祥,朱云超
(中国矿业大学计算机科学与技术学院,江苏 徐州 221116)
摘要:信息物理融合系统(Cyber-Physical System, CPS)自给出以来就备受关注。一个CPS系统设计的好坏关键取决于其设计前期的系统模型的创建。如何对一个CPS系统进行全方位、健壮性、安全性的建模是国内外研究的焦点和难点。在前人的基础之上,把CPS系统分为物理实体、计算实体和控制实体,给出了一种CPS系统计算实体的建模方法:基于动态行为建模的UML建模方法DBM UML (Dynamic behavior modeling-UML),对整个系统的结构进行详细的分析,将其对应的状态机抽象出来,先通过状态机的动态行为建模对系统进行模型化,再通过UML建模语言对整个系统计算实体进行详细化建模,把系统的逻辑关系和反馈机制等详尽的表现出来,完成系统的计算实体建模。
关键词:信息物理融合;UML;动态行为建模;状态机
中图分类号:TP391.9????? 文献标识码:A?? ???文章编号:1004-731X (2016) 05-1003-07
Modeling Computation Entity of CPS Based on Dynamic Behavior
Ye Feng, Xia Yang, Shen Zhaoxiang, Zhu Yunchao
(School of Computer Science and Technology, China University of Mining Technology, Xuzhou 221116, China)
Abstract: The Cyber-Physical System (CPS) has been highly concerned since it was proposed. However, the key of creating a good CPS system critically depends on the prophase design of the system model. Currently, it has become the focus and difficulty of research at home and abroad that models a CPS system with comprehensive, robustness, security. According to the previous studies, the CPS system was divided into computing entity, physical entity and control entity. A modeling method of computation entity of CPS was provided, which is DBM-UML (Dynamic behavior modeling-UML). With this method, an analysis of the entire system's structure was given firstly and the corresponding state machine was abstracted. In another word, the system was modeled firstly by the dynamic behavior modeling of the state machine. Then the detailed modeling of the computation entity of the system by the UML modeling language was proposed. The logical relationship and feedback mechanism of the system were proposed and the system was modeled better.
Keywords: CPS; UML; dynamic behavior modeling; state machine
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于GSCPN模型的网络安全加固措施制定方法
高翔1,2,刘洋1,贺筱媛1
(1. 国防大学信息作战与指挥训练教研部,北京 100091;2. 数学工程与先进计算国家重点实验室,郑州 450002)
摘要:为了从整体上提高网络安全性,提出了一种基于广义随机着色Petri网模型的网络安全加固措施制定方法。该方法引入主机节点利用率指数和主机节点关键度等概念,通过计算主机节点的关键度对网络中需要修补的脆弱节点进行排序,在此基础上根据最大节点关键度优先的原则逐步消除网络中存在的脆弱性。针对网络实例的分析进一步验证了所提出方法的有效性。与传统方法相比,具有可操作性强的特点,可以指导网络管理人员制定安全加固措施对目标网络进行安全加固
关键词:安全评估;GSCPN模型;建模;安全加固
中图分类号:TP301????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1009-08
Method for Network Security Reinforcement Based on GSCPN Model
Gao Xiang1,2, Liu Yang1, He Xiaoyuan1
(1. The Department of Information Operation & Command Training, NDU of PLA, Beijing 100091, China; GDrag8879环亚手机|首页主页
2. State Key Laboratory of Mathematical Engineering and Advanced Computing, Zhengzhou 450002, China)
Abstract: In order to improve the security of networks in whole, a method of making strategies for the network security reinforcement based on Generalized Stochastic Colored Petri Net was proposed. The concepts of host node utilization index and host node key degree were introduced, which enabled the vulnerable nodes that needed repairing sorted by the value of host node key degree. On this basis, security level of the target network was increased by the reinforcement according to the principle of maximum node key degree first. The network instance further validates that the proposed method for network security reinforcement is effective, and the operability is better than traditional methods.
Keywords: security assessment; GSCPN; modeling; security reinforcement
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于超像素和局部稀疏表示的目标跟踪方法
杨恢先,刘昭,刘阳,刘凡,贺迪龙
(湘潭大学物理光电工程学院,湖南 湘潭 411105
摘要:针对目标跟踪过程中的目标对象外观变化问题,提出一种鲁棒的基于超像素和局部稀疏表示的目标跟踪方法。在训练阶段,通过将训练帧图像分割得到的超像素聚类构造判别型外观模型;在第一帧图像中,计算目标模板的稀疏性直方图,建立生成型外观模型。在跟踪阶段,计算基于超像素的置信图,采样候选样本,计算候选样本的置信值;利用局部图块计算样本的稀疏性直方图与模板直方图的相似度。根据置信值和相似度,计算候选样本的运动模型和观测模型,得到候选样本的最大后验估计,确定目标跟踪结果。对2种外观模型都保持在线独立更新。仿真实验表明,目标发生外观变化时,算法能得到较准确和鲁棒的跟踪结果。
关键词:超像素;置信图;稀疏表示;外观模型
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1017-14
Object Tracking Method Based on Superpixel and Local Sparse Representation
Yang Huixian, Liu Zhao, Liu Yang, Liu Fan, He Dilong
(Physics and Optoelectronic Engineering College, Xiangtan University, Xiangtan 411105, China)
Abstract: Due to the appearance changing of target object in object tracking, a tracking algorithm was proposed based on superpixel and local sparse representation (SPS). In training process, a discriminative appearance model was constructed by clustering the segmented train images; sparsity-based histogram of target object was calculated to construct generative appearance model. In tracking, superpixel-based confidence map was obtained, and the confidence values of candidates was sampled and calculated; the similarity between sparsity-based histogram of candidates and target template was computed by using local patches. Then motion model and observation model of candidates according to the confidence values and similarity of candidates were computed, which obtained maximum a posterior estimate of the samples and determined the track result. Furthermore, online updating of the two appearance model was kept independently. The experimental results and evaluations demonstrate that application of SPS algorithm can obtain accurate and robust track result with theappearancevariation of target object.
Keywords: superpixel; confidence map; sparse representation; appearance mode
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
葛延峰1,梁鹏2,高立群3,翟军昌3
(1. 国网辽宁省电力有限公司调度控制中心,辽宁 沈阳 110004;2. 国网辽宁省电力有限公司锦州供电公司,辽宁 锦州 121000GDrag8879环亚手机|首页主页
3. 东北大学信息科学与工程学院,辽宁 沈阳 110819)
摘要:针对传统预测方法对风电场输出功率短期预测过度依赖大量的观测数据,不能有效排除早期数据的影响、缺乏自适应性等不足,采用滑动窗口加权递推最小二乘法建立风场输出电功率预测模型。在新的预测模型中,通过加权及滑动窗口的方法,使模型侧重于当前数据对预测结果的影响,对外界环境数据的变化具有自适应性,排除了历史数据对预测结果的干扰。针对预测模型的定阶问题,利用和声搜索算法对预测模型的阶数和参数进行优化,可以提高模型的预测精度和适用性。利用辽宁某风电场的真实历史数据建模仿真验证方法的有效性。
关键词:风电功率预测;最小二乘法;滑动窗口;和声搜索
中图分类号:TP 301.6????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1031-07
Sliding Weighted Least Square Model for Short-term Wind Power Prediction
Ge Yanfeng1, Liang Peng2, Gao Liqun3, Zhai Junchang3
(1. State Grid Liaoning Electric Power Supply Co., Ltd, Shenyang 110004, China;GDrag8879环亚手机|首页主页
2. Jinzhou Power Supply Company, Liaoning Power Grid Co. SGCC, Jinzhou 121000, China;GDrag8879环亚手机|首页主页
3. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China)
Abstract: A new approach for wind power forecasting was proposed based on sliding window weighted recursive least squares for the defect of wind power short-term prediction in the traditional prediction methods. The historical data was weighted and the perturbation caused by the historical data was ruled out in this method, which focused on the current data on the result of prediction. This made the model have the adaptability to the change of the environment data. The harmony search algorithm was used to optimize the orders and the parameters of the predict model, which could improve the precision and accuracy of the prediction result. The simulation was carried out for the real historical data of the wind farm in Liaoning Province, China to demonstrate the effectiveness of the proposed method.
Keywords: wind power prediction; least square method; sliding window; harmony search
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
一种基于信号流图理论的流体网络建模方法
张悦,韩璞
(华北电力大学 河北省发电过程仿真与优化控制工程技术研究中心,保定 071003)
摘要:在流体网络机理建模过程中,引入信号流图的概念来描述流体网络,将流体网络中的各种结构规范为节点和支路两大类,建立节点压力和支路阻力的算法关系。针对流体网络的非线性,强耦合的特点,对节点压力在静态工作点附近泰勒级数展开,通过静态工作点附近线性模型去描述非线性网络,给出了利用有向图提高工作点导纳矩阵计算效率的方法。并对网络模型进行分析,给出了流体网络分段模型的一般结构形式。借助于一个实例,阐述了利用上述方法建立流体网络模型的方法和过程。建模过程表明,该方法简单有效,获得的分段模型具有很强的实用价值。
关键词:流体网络;机理建模;信号流图;稀疏矩阵
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1038-07
Fluid Network Modeling Method Based on Theory of Signal Flow Graph
Zhang Yue, Han Pu
(Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation, North China Electric Power University, GDrag8879环亚手机|首页主页
Baoding 071003, China)
Abstract:The concept of signal flow graph was introduced into the mechanism modeling process to describe the fluid network. Various structures in the fluid network were classified as node and branch, and establish the algorithm relationship between nodepressure and bransh resistance. Aiming at the characteristics of nonlinear and strong coupling of fluid network, the node pressure was expressed by Taylor series near the quiescent operation point using the linear model to describe the nonlinear network.A method was proposed which used the directed graph to improve the computational efficiency of the admittance matrix at the working point. Based on the analysis of the new network models, the general structure of segmented model of fluid network was given. Through an example, the method and process of establishing the fluid network model were elaborated by using the above method. The modeling process indicates that this method is simple and effective, and the segmented model obtained has a strong practical value.
Keywords: fluid network; mechanism model; signal flow graph; sparse matrices
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
求解分数阶混沌系统参数估计问题的和声引力搜索算法
黄宇,王佳荣,梁伟平
(华北电力大学 河北省发电过程仿真与优化控制工程技术研究中心,保定 071003)
摘要:针对分数阶混沌系统的参数估计问题,提出了一种和声引力搜索算法。通过和声搜索算法中的记忆选择与概率搜索对引力搜索算法更新后的粒子进行再创作与调整。为解决粒子接近最优解时出现速度变化过快的问题,提出将和声搜索算法中的局部调整概率值设置为随算法迭代次数增加而非线性减小。采用标准测试函数对该算法进行了测试,测试结果表明本文算法具有良好的稳定性和全局搜索能力。将该算法应用于分数阶R?ssler混沌系统与分数阶Lorenz混沌系统的参数估计,计算结果表明了本算法的有效性和鲁棒性。
关键词:分数阶混沌系统;参数估计;引力搜索算法;和声搜索
中图分类号:TP273????? ?文献标识码:A??????? 文章编号:1004-731X (2016) 05-1045-09
Harmony Gravitational Search Algorithm for Solving the Problem of Parameter Estimation for Fractional-order Chaotic Systems
Huang Yu, Wang Jiarong, Liang Weiping
(Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation,GDrag8879环亚手机|首页主页
North China Electric Power University, Baoding 071003, China)
Abstract: Aiming at parameter estimation for fractional-order chaotic systems, a harmony gravitational search algorithm was proposed. The particles, which were updated by gravitational search algorithm, were recreated and searched through memory selections and probability search in harmony search algorithm. At the same times, in order to solve the problem that the speed changed too fast when the particles closed to the optimal solution, the partial adjustment probability was set to non-linearly decrease with the adsorption capacity increasing. Standard test functions were used to test the algorithm, and the test results show that the algorithm has good stability and global search capability. At last, the harmony gravitational search algorithm is applied in the parameter estimation for fractional-order R?ssler system and fractional-order Lorenz system, and the estimation results show that the algorithm is effective and robust.
Keywords: fractional-order chaotic systems; parameter estimation; gravitational search algorithm; harmony search
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于混合量子粒子群算法的DFIG参数辨识
蒋莹莹,纪志成
(江南大学轻工过程先进控制教育部重点实验室,江苏 无锡 214122)
摘要:为了确保双馈感应发电机(Doubly Fed Induction Generator, DFIG)参数的准确性,提高发电机的控制性能,提出了基于混合量子粒子群算法的参数辨识方法。坐标系下建立了DFIG参数辨识的模型。对量子粒子群算法进行改进并与模拟退火算法进行混合,得到混合量子粒子群辨识算法。在Matlab/Simulink中将所提出的混合算法用于DFIG的参数辨识,并与粒子群算法、量子粒子群算法和改进量子粒子群算法进行了对比验证。仿真结果表明所提出的算法能提高定子电阻、定子电感、转子电阻、转子电感以及定转子互感五个参数的辨识精度。
关键词:双馈风力发电机;参数辨识;量子粒子群算法;模拟退火算法;混合算法
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1054-09
Hybrid Quantum-Behaved Particle Swarm OptimizationGDrag8879环亚手机|首页主页
for Parameter Identification of DFIG
Jiang Yingying, Ji Zhicheng
(Key Laboratory of Advanced Process Control for Light Industry, Jiangnan University, Wuxi 214122, China)
Abstract: In order to ensure the accuracy of the doubly-fed wind power generator (DFIG) and improve the control performance of the generator, a hybrid quantum-behaved particle swarm optimization for parameter identification was proposed. A parameter identification model of DFIG at ?coordinate was established. Quantum-behaved particle swarm optimization (QPSO) was improved and then mixed with simulated annealing (SA) algorithm. The proposed algorithm was compared with particle swarm optimization (PSO), QPSO and improved QPSO, which were applied to parameter identification of DFIG in Matlab/Simulink. Simulation results show that the proposed algorithm can improve the identification accuracy of the five parameters including stator resistance, stator inductance, rotor resistance, rotor inductance, and mutual inductance of stator and rotor.
Keywords: DFIG; parameter identification; QPSO; SA; hybrid algorithm
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
改进布谷鸟算法在人群疏散多目标优化中的应用
董崇杰1,刘毅2,彭勇1
(1.东莞职业技术学院,东莞 523808;2.湖南省农机管理局,长沙 410011
摘要:大型场馆的人员疏散问题实际上是一个多目标的优化问题,要求达到疏散时间短、疏散路径长度小、拥挤度低等目标,而由于约束条件之间的冲突性,使多个目标同时达到最优是困难的。目前主要的求解方法是利用智能进化算法进行启发式搜索和解的偏序关系为特征的演化多目标优化算法求解。布谷鸟算法是在布谷鸟寻窝产卵的行为中发现了一种新的搜索算法,基本的布谷鸟算法的搜索活力不足、搜索偏慢。从改变布谷鸟算法的搜索多样性等方面着手提高布谷鸟算法在优化问题上的求解能力,将新算法用于人群疏散的多目标优化,取得了较好的效果
关键词:疏散模型;布谷鸟算法;人群疏散;多目标优化
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1063-07
Improved Cuckoo Search AlgorithmGDrag8879环亚手机|首页主页
Applied to Multi-objective Optimization of Crowd Evacuation
Dong Chongjie1, Liu Yi2, Peng Yong1
(1.Dongguan Polytechnic, DongGuan 523808, China; 2.Hunan Agricultural Machinery Management Bureau, Changsha 410011, China)
Abstract: The crowd evacuation problem is a multi-objective optimization problem in large public places under the emergency, but because of the conflict between multiple objectives in multi-objective optimization problem, it is difficult to make the multiple targets achieve the optimal at the same time. The most popular solution is an evolution multi objective optimization algorithm for the characteristics of heuristic search of population and the partial order relation. Cuckoo search algorithm is a new search algorithm which was found in the behavior of cuckoo nest spawning lies, the basic cuckoo search algorithm is lack of vitality, and search is slow. From the change of cuckoo search algorithm search diversity to improve the ability to solve the cuckoo algorithm in optimization problems, a new algorithm was applied to multi-objective optimization of crowd evacuation, which has achieved good results.
Keywords: evacuation model; cuckoo search algorithm; crowd evacuation; multi-objective optimization
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
耿贝尔分布的最优线性矩估计
翟宇梅1,赵瑞星2
(1. 北京应用气象研究所,北京 100029;2. 中国人民解放军61741部队,北京 100094)
摘要:线性矩法是工程实践中极值分布函数参数估计常用方法之一。为提高线性矩法对耿贝尔分布的估计精度,通过蒙特卡罗模拟比较研究了12种常用经验分布函数的估计结果,选用估计误差最小的经验分布函数构造最优线性矩估计法,并与普通矩法、线性矩法和极大似然函数法进行了比较。仿真结果表明,选择合适的经验分布函数可以提高参数估计精度样本容量不同,最优经验分布函数不同多数情况下最优线性矩法估计精度较高,特别是在样本容量为1 000~10 000时,其估计结果均好于普通矩法、线性矩法和极大似然函数法。
关键词:耿贝尔分布;蒙特卡罗模拟;经验分布函数;最优线性矩;样本容量
中图分类号:TP301.6????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1070-07
Optimal Linear Moment Estimation Method for Gumbel Distribution
Zhai Yumei1, Zhao Ruixing2
(1. Beijing Institute of Applied Meteorology, Beijing 100029, China; 2. Unit 61741 of PLA, Beijing 100094, China)
Abstract: Linear moment is one of the important methods to estimate the extreme value distribution function in engineering practice. In order to improve the estimation performance for Gumbel distribution, the estimating results of twelve empirical distribution functions were simulated by using Monte Carlo method. The optimal linear moment estimation method was constructed based on the empirical distribution function with the minimum estimation error, and compared with ordinary moment, traditional linear moment and maximum likelihood method. The study shows that choosing an appropriate empirical distribution function can enhance the estimation accuracy. The optimal empirical distribution function varies depending on the sample size, and its result is quite satisfactory in most cases and offers the best among the other methods especially in the sample size of 1 000~10 000.
Keywords: Gumbel distribution; Monte Carlo simulation; empirical distribution function; optimal linear moment; sample size
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
代价敏感的监督流形学习人脸识别方法
崔业勤,高建国
(廊坊师范学院数学与信息科学学院,河北 廊坊 065000)
摘要:基于子空间学习的人脸识别均假设所有错误识别会导致一样的损失。在人脸识别应用中,不同的错误识别造成的损失则不同。提出一种代价敏感的监督流形学习人脸识别方法,该方法采用一个代价矩阵来指定不同的误分类代价,并将其容纳到局部保持投影(Locality Preserving ProjectionsLPP)算法中,获得相应的代价敏感局部保持投影(Cos-Sen LPP),以实现人脸识别整体损失最小化。在3个人脸数据库上的实验结果表明,与现有的子空间学习方法相比,Cos-Sen LPP方法花费了最少的整体代价
关键词:代价敏感;流形学习;人脸识别;局部保持投影
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1077-09
Face Recognition Method Based on Cost-Sensitive Supervised Manifold Learning
Cui Yeqin, Gao Jianguo
(College of Mathematics and Information Science, Langfang Normal University, Langfang 065000, China)
Abstract: Existing subspace learning-based face recognition methods assume the same loss from all misclassifications. In the real-world face recognition applications, however, different misclassifications can lead to different losses. Motivated by this concern, a cost-sensitive supervised manifold learning approach for face recognition was proposed. The proposed approach incorporated a cost matrix to specify the different costs associated with misclassifications of subjects, into locality preserving projection algorithm, which devised the corresponding cost-sensitive methods, namely, cost-sensitive locality preserving projections (Cos-Sen LPP), to achieve a minimal overall loss. Three face databases were put into the experiments and experimental results show that Cos-Sen LPP method can achieve minimal cost than existing subspace learning-based face recognition methods.
Keywords: cost-sensitive;manifold learning; face recognition; Locality Preserving Projections (LPP)
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
-171自动驾驶仪通用半实物仿真试验系统研究
胡仁伟1,郭楠1,孔霞2,彭军3,孙传伟4
(1. 总参谋部陆航装备发展办公室,北京 101100;2. 中航工业兰州飞行控制有限公司,兰州 730070GDrag8879环亚手机|首页主页
3. 中国直升机设计研究所,景德镇 333001;4. 直升机旋翼动力学国家级重点实验室,南京航空航天大学,南京 210016
摘要:构建了一套通用的米-171直升机AΠ-34Б自动驾驶仪模拟式和数字式半实物仿真试验系统研制了模拟式和数字式组合接口的航电信号仿真器-171直升机非线性飞行动力学数学模型搭建了模拟式和数字式飞行控制系统的地面半实物仿真试验环境,依据飞行试验大纲开展了地面系统仿真试验和空中飞行试验。飞行试验结果表明,所有科目均一次性达标,空中试飞和地面试验结果一致性良好,仿真试验系统完整有效。,建立了
关键词:米-171;直升机;自动驾驶仪;通用;半实物仿真试验系统
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1086-08
General HILS System Research of Mi-171 Helicopter Autopilot
Hu Renwei1, Guo Nan1, Kong Xia2, Peng Jun3, Sun Chuanwei4
(1. Army Aviation Equipment Development Office of the Headquarters of the General, Beijing 101100, China;GDrag8879环亚手机|首页主页
2. AVIC Lanzhou Flight Control Co., LTD., Lanzhou 730070, China; 3. China Helicopter Research and Development Institute, Jingdezhen 333001, China;GDrag8879环亚手机|首页主页
4. National Key Laboratory of Rotorcraft Aeromechanics, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China)
Abstract: A general analogous and digital Hardware-In-the-Loop-Simulation (HILS) system was built for AΠ-34Б autopilot of Mi-171 helicopter. Simulator of avionics signals with hybrid interface for both analogous and digital signals was developed. A nonlinear flight dynamics mathematical model was built for Mi-171 helicopter. And on-ground test condition was built for analogous and digital flight control system. Test of on-ground system simulation and aerial flight were done by referring to Flight Test Outline. Results of flight test indicate that all classifications satisfy criteria at once, and the test results of aerial and on-ground are in good concordance and simulation test conditions are complete and effective.
Keywords: Mi-171; helicopter; autopilot; general; Hardware-In-the-Loop-Simulation (HILS) System
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
雷达/红外双模复合制导并行仿真系统设计
赵世明,孙致月
(中国人民解放军91336部队,河北 秦皇岛 066000)
摘要:针对雷达/红外双模复合制导导引头仿真试验需求,详细设计了基于并行仿真的双模复合制导半实物仿真系统,重点研究了并行仿真系统控制模式和控制关系、复合制导信号融合和决策设计,以及并行仿真时空一致性分析。为定量分析并行仿真时空一致性,建立了双模复合制导并行仿真系统仿真模型、导弹姿态运动误差模型和目标空间误差模型,仿真分析表明,并行仿真系统时空一致性可满足复合制导仿真试验与评估应用需求,验证了双模复合制导仿真系统设计的有效性。
关键词:复合制导;信息融合;时空一致性
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1094-06
Design on Parallel Simulation System for Radar/IR Dual Mode Compound Guidance
Zhao Shiming, Sun Zhiyue
(No.91336 Troop of PLA, Qinhuangdao 066000, China)
Abstract: Aiming at simulation test requirement for Radar/IR dual mode compound guidance seeker, the HWIL simulation system for dual mode compound guidance based on parallel simulation was designed in detail, the key technology design was studied mainly, which consists of control mode and control relation, compound guidance information fusion and decision-making design, and parallel simulation Space and Time Consistency. The simulation model of parallel simulation system, missile attitude motion error model and target space error model were built for the Space and Time Consistency analysis. The simulation results show that simulation test and evaluation application requirement is satiable, and feasibility of dual mode compound guidance simulation system design is validated.
Keywords: compound guidance; information fusion; Space and Time Consistency
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于帧时隙的欠定盲分离RFID防碰撞算法研究
张小红,金允钢
(江西理工大学信息工程学院,江西 赣州 341000)
摘要:针对当识别标签数目大量增加时,欠定盲分离算法出现的分离效果变差,系统整体性能急速下降等问题,提出一种基于约束性非负矩阵分解(NMFNonnegative Matrix Factorization)与帧时隙ALOHA(FSA)的并行识别防碰撞算法,通过合理的帧时隙数选择,可以使每一时隙内的标签数目控制在最佳的范围内,使得即使标签数目大量增加时,仍能使RFID(Radio Frequency Identification)系统性能保持在最佳状态。仿真结果表明,在天线数相同的情况下,改进的算法与基于动态位隙分组盲分离防碰撞(BSDBG, Blind Separation and Dynamic Bit-slot Grouping)算法相比,当天线数为4~28时,标签识别率提高了180%~389%,标签识别速度提高了39%~70%,同时改进的算法具有高效性和低成本性,具有非常好的应用价值。
关键词:射频识别;欠定盲分离;防碰撞;帧时隙ALOHA算法;非负矩阵分解
中图分类号:TN911.23????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1100-10
Research of Under-determined Blind Source Separation Anti-collision AlgorithmGDrag8879环亚手机|首页主页
Based on RFID Frame-slot
Zhang Xiaohong, Jin Yungang
(School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China)
Abstract: For the algorithm of under-determined blind separation’s result becomes worse as the increasing number of tags, causes the decline of the overall system performance or other issues, a novel parallelizable identification anti-collision algorithm based on NMF and framed-slot was proposed. The number of tags in each slot can be controlled within the optimum range by selecting the reasonable number of slots, remained the best condition of the RFID system. Compared with the Blind Separation and Dynamic Bit-Slot Group (BSDBG) algorithm using the same multi-antenna technology, the simulation results show that the tag identification rate improves from 180% to 389% and the tag identification speed of the proposed algorithm increases from 39% to 70% when the number of antennas is from 4 to 28. This algorithm has the advantages of high efficiency and low cost, has the very good application value in efficient field.
Keywords: RFID; under-determined blind separation; anti-collision; framed slotted ALOHA (FSA); NMF
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
结构重叠网格方法在航天气动问题中的应用
袁武
(中国科学院计算机网络信息中心超级计算中心,北京 100190)
摘要:结构重叠网格方法是现阶段研究多部件构型飞行器气动问题最有工程价值的网格技术。采用重叠网格技术和计算流体力学方法,研究了常规战术导弹在有舵面偏转条件下遇到的2个典型气动问题:1)研究了小不对称外形,指出传统方法在数据变换时会引入横侧向气动误差,提出了一种简单实用的线性修正模型,数值结果表明修正模型能有效缩小误差范围,消除由不对称分离涡引入的偏态分布误差;2)研究了通道线性迭加模型,分析模型误差的主要来源是联合控制时共用舵面的舵效非线性,大舵偏俯仰通道易对小舵偏滚动通道形成干扰,定量评价了滚动通道的舵效耦合损失。
关键词:计算流体力学重叠网格飞行器多体气动问题
中图分类号:V211.3????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1109-08
Chimera Grid Methods Applied in Astronautics Aerodynamic Problems
Yuan Wu
(Supercomputting Center, Computer Network Information Center, Chinese Academy of Sciences, Beijing 100190, China)
Abstract: Structured chimera grid method has been considered as the most applicable technology to solve aerodynamic problems of multi-component configuration aircraft at current stage. Therefore, by using structured chimera technology and CFD method, two typical aerodynamic problems of conventional tactics missile configuration with rudder deflection were thoroughly investigated: i) a simple and practical linear modification model for micro unsymmetry configuration was proposed which could effectively reduce the range of error and eliminate its skewness properties caused by asymmetric separation vortex, while the traditional method introduced lateral aerodynamic error in data transformation; ii) 3-tunnel linear adding model was investigated and the research shows that linear model’s error was mainly caused by the sharing rudder’s nonlinear performance, and the coupling losses of the steerage has also been quantitatively evaluated.
Keywords: CFD, chimera grid, aircraft, multi-body aerodynamics
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
云平台下基于半朴素贝叶斯的降雨量预测
薛胜军1,2,张佩云1,陈静怡1
(1.南京信息工程大学计算机与软件学院,南京 210044;2.南京信息工程大学江苏省网络监控中心,南京 210044)
摘要:随着降雨量预测在中国的气象预报行业中日趋重要,降雨量预测的方法也越来越多。由于云平台可以有效地提高预测的效率和准确率,云平台也逐渐被应用到气象行业。目前我们运用的降雨量预测方法要求属性之间独立,但是很多气象要素之间并不独立,这就降低了预测的准确性。因此结合并利用模糊集理论的相关知识,提出了一个基于云平台的半朴素贝叶斯预测降雨量的方法。为证明预测的准确性和高效性,建立了一个预测模型,用气象站提供的气象数据预测下个月的降雨量。实验结果证明,建立的模型与先前的模型相比,具有更高的预测准确性和效率。
关键词:云平台;降雨量预测;模糊集理论;半朴素贝叶斯
中图分类号:TP311.13????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1117-08
Semi-naive Bayesian Forecasts Rainfall on Cloud Platform
Xue Shengjun1,2, Zhang Peiyun1, Chen Jingyi1
(1. School of Computer and Software, Nanjing University of Information science and Technology, Nanjing 210044, China;GDrag8879环亚手机|首页主页
2. Jiangsu Engineering Center of Network Monitoring, Nanjing University of Information and Technology, Nanjing 210044, China)
Abstract: Rainfall forecast has played an increasingly important role of meteorological services. As cloud platform can improve the efficiency and accuracy of rainfall forecast, it has been applied to forecast rainfall. The recent forecast methods require the independence between all the attributes, but most of the meteorological factors are interdependent, which reduces the accuracy of the prediction. Consequently, a semi-naive Bayesian classification was proposed combined with fuzzy set theory realizing it on cloud platform. At the same time, to improve the accuracy and the efficiency of rainfall forecast, a forecast model was established, which used the historical weather data provided by the weather stations to forecast the next-month rainfall. The experimental results show the method is able to provide higher accuracy and efficiency of rainfall forecast compared with the previous methods.
Keywords: cloud platform; rainfall forecast; fuzzy sets theory; Semi-Naive Bayesian
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于神经网络遗传算法的铝电解槽电压优化
徐辰华,李智
(广西大学电气工程学院,南宁 530004)
摘要:为降低电解铝的生产成本,提出了一种基于神经网络遗传算法的电解铝生产过程槽电压优化方法,以寻找最优生产槽电压和对应的生产条件。采用核主元分析法确定影响电解铝生产的关键参数建立槽电压的神经网络模型利用遗传算法寻找电解铝槽电压的全局最优值及对应的生产条件。通过实际生产数据进行仿真实验,结果表明,基于神经网络遗传算法全局寻优的能力,该优化方法能准确预测电解铝槽电压,同时能够找到电解铝生产过程中的最优槽电压及其对应的优化生产条件。
关键词:电解铝;槽电压;遗传算法;神经网络建模
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1124-07
Cell Voltage optimization of aluminum electrolysis Based on Neural Network-genetic Algorithm
Xu Chenhua, Li Zhi
(School of Electrical Engineering, Guangxi University, Nanning 530004, China)
Abstract: In order to reduce the production cost of electrolytic aluminum, an optimization extreme method was proposed based on neural network and genetic algorithm, to find the optimal production cell voltage and the corresponding production conditions. Using kernel principal component analysis method to determine the key parameters affecting of aluminum electrolysis production, a neural network model of electrolytic aluminum was established. Using the genetic algorithm, the global optimal value of the cell voltage of the electrolytic aluminum and the corresponding production conditions were found. The simulation results show that the neural network and genetic algorithm can predict the cell voltage of electrolytic aluminum accurately, at the same time it can find the optimal cell voltage, and the production conditions.
Keywords: electrolytic aluminum; cell voltage; genetic algorithm; neural network modeling
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
不对称故障下直驱风机网侧改进控制仿真研究
王丹,刘崇茹,李庚银
(新能源电力系统国家重点实验室(华北电力大学),北京 102206)
摘要:针对直驱型风电机组在电网不对称故障时直流电压和输出功率的波动问题,提出了一种综合的网侧换流器改进控制策略。在对网侧输出功率特性的分析中,将网侧电压和电流的正序、负序分量变换到同一坐标系中进行归算,以准比例谐振控制器为基础设计了同时抑制有功和无功二次谐波的补偿控制环节。此外,在网侧直流电压常规控制中加入反映直流母线两侧功率偏差的前馈修正分量,抑制直流母线过电压。在PSCAD/EMTDC仿真软件中建立了直驱型风电机组的并网系统模型,仿真结果验证了所提出的网侧改进控制策略在提高直驱风机故障穿越能力方面的有效性。
关键词:直驱型风电机组;不对称故障;二次谐波补偿控制;前馈控制;故障穿越
中图分类号:TM 464;TM 614????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1131-10
Simulation Study of Grid-side Improved Control Strategy for Direct-driven Wind Turbine Under Unbalanced Faults
Wang Dan, Liu Chongru, Li Gengyin
(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
(North China Electric Power University), Beijing 102206, China)
Abstract: In order to reduce the power and DC voltage fluctuations of direct-driven wind turbine under unbalanced grid faults, an integrated and improved control strategy for grid-side converter was proposed. In the analysis of grid-side power characteristics, positive and negative sequence components of grid-side voltage and current were calculated by converting them to the same reference frame and a compensation control loop to simultaneously restrain the second harmonic components of active and reactive power was designed on the basis of quasi proportional resonant control. Moreover, to reduce DC-link overvoltage, a feed-forward modified component reflecting the active power error between the two-terminal converters was added to the traditional DC voltage controller. A simulation model of direct-driven wind turbine grid-connected system was built in PSCAD/EMTDC. The simulation results validated that the proposed control strategy can improve the fault ride-through capability of direct-driven wind turbine.
Keywords: direct-driven wind turbine; unbalanced faults; second harmonic compensation control; feed-forward control; fault ride-through
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
事件触发NNCS鲁棒H保性能容错与通讯协同设计
李炜,阎坤,李亚洁
(兰州理工大学电气工程与信息工程学院,甘肃 兰州 730050)
摘要:基于离散事件触发通讯机制(DETCS,discrete event-triggered communication scheme),研究了执行器故障下不确定非线性网络化控制系统的鲁棒H保性能容错控制与通讯协同设计问题。引入DETCS,采用状态反馈控制策略,建立了闭环故障系统模型;结合Lyapunov稳定性理论及少保守性技术,得到了DETCS使系统具有鲁棒H保性能容错控制的时滞/事件依赖的充分条件,提供控制器与事件触发权矩阵协同优化求解的方法,讨论了几种不同目标约束下鲁棒控制与DETCS的协同设计问题;通过仿真实例验证了所述方法的有效性。
关键词:非线性网络化控制系统;离散事件触发通讯机制;H保性能容错控制;协同设计
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1140-10
Co-design Between Robust H Guaranteed Cost Fault-tolerant and Communication for NNCS Based on Event-triggered
(College of Electrical and information engineering, Lanzhou University of Technology, Lanzhou 730050, China)
Abstract: Based on the discrete event-triggered communication scheme (DETCS), the co-design between robust Hguaranteed cost fault-tolerant control and communication was studied for uncertain nonlinear networked control system (NNCS) with actuator failures. Firstly, a new closed-loop failure model was established by introducing the DETCS and adopting state feedback control strategy. Then, based on the Lyapunov stability theory and less-conservative technology, the sufficient condition of NNCS with robust H guaranteed cost was derived, which was the time-delay/event-dependent approach, moreover, some optimal co-design methods between the fault tolerant controller and event-triggered weight matrix were given. Furthermore, the co-design problems of fault-tolerant control and discrete event-triggered communication were discussed under different index constraints. Finally, a simulation example illustrates the effectiveness of the proposed approach.
Keywords: Nonlinear networked control system; discrete event-triggered communication scheme; ?guaranteed cost fault-tolerant control; co-design
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于李群的水下航体动力学建模及最优控制
白龙1,董志峰1,戈新生2
(1.中国矿业大学(北京)机电与信息工程学院,北京 100083;2.北京信息科技大学机电工程学院,北京 100192
摘要:研究了水下航体的李群建模法和高斯伪谱能量最优控制。先将水下航体简化为自由刚体,针对水下航体的大姿态转动角度存在的奇异性问题,引入李群和李代数,结合变分法和拉格朗日法,得到刚体动力学方程,将传统水动力表达式进行变换,得到基于李群的水下航体动力学方程。利用高斯伪谱法,将水下航体连续空间最优控制问题转化为非线性规划,在此基础上采用MATLAB进行求解。通过对水下航体进行能量最优控制的仿真结果的分析可知,所采用的最优控制方法较好的满足了约束条件,算法的求解精度较高,对初值的依赖性较小,所设计的计算方法可行。
关键词:水下航体;李群;变分法;能量最优;伪谱法
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1150-08
Lie Group Modeling and Optimal Control of Underwater Vehicle
Bai Long1, Dong Zhifeng1, Ge Xinsheng2
(1. School of Mechanical Electronic &Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;GDrag8879环亚手机|首页主页
2. Mechanical & Electrical Engineering school, Beijing Information Science &Technology University, Beijing 100192, China)
Abstract: The Lie group modeling method and gauss pseudo-spectral energy optimal control of the underwater vehicle are in research. Simplifying the underwater vehicle to be a free rigid body, in view of the possible large attitude angle maneuvering of the underwater vehicle, importing the concept of lie group and lie algebra, combining with the variation method and Lagrange method, the dynamics equation of the rigid body was derived, translating the tradition expression of the hydrodynamic force to obtain the dynamics equation of the underwater vehicle base on the lie group. With the Gauss pseudo-spectral method, the continue space optimal control problem of the underwater vehicle was translated into the nonlinear programming solved with MATLAB. According to the simulation of the energy optimal control of the underwater vehicle under the constraints of boundary values, path and control, the optimal control method can satisfy the constraint conditions, the method has a high accuracy, has a low dependency to the initial value, and the calculation method is feasible.
Keywords: underwater vehicle; Lie group; variational method; energy optimum; pseudo-spectral method
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
道路交通事故应急处置的微观在线仿真方法
林培群,刘佳辉,姚凯斌
(华南理工大学土木与交通学院,广州 510640)
摘要:为了能够在交通事故发生后快速、定量地评估各种应急处置方案的实施效果,从而得出相对最优的应急处置方案,提出了一种通过在线仿真进行辅助决策的方法,在设计在线仿真的流程与功能结构的基础上,提出交通应急处置方案的评价指标,并建立适用于道路交通事故的车辆运动模型。基于VISSIM-COM搭建了在线仿真决策支持系统,并应用于广东省某典型高速公路路段。仿真和实际应用结果表明:在线仿真系统能够快速地对多种交通事故应急处置方案进行定量评价,具备科学的辅助决策作用,为高速公路的精细化管理提供了强有力的技术支持。
关键词:交通工程;道路交通事故;在线交通仿真;交通应急
中图分类号:U491????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1158-07
microscopic online simulation method of road traffic accident emergency disposal
Lin Peiqun, Liu Jiahui, Yao Kaibin
(School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)
Abstract: An online simulation based decision making method was proposed to search for the comparatively optimal emergency disposal plan quickly and quantitatively after the traffic accident, and the evaluation index of traffic emergency disposal plans was proposed on the foundation of designing the process and framework of the online simulation, and the vehicle movement model applied to highway traffic accident was established. The online simulation based decision making system was developed using VISSIM-COM interface, and it has been applied to a typical highway of Guangdong Province. The simulation and the practical application results illustrate that multiple emergency disposal plans can be evaluated quantitatively and rapidly by the online simulation system, hence it has a scientific assistant decision making effect, and it provides strong technical supports to the refined highway management.
Keywords: traffic engineering; road traffic accident; online traffic simulation; traffic emergency response
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
储能系统能量调度与需求响应联合优化控制
高雪莹,唐昊,苗刚中,平兆武
(合肥工业大学电气与自动化工程学院,安徽 合肥 230009)
摘要:为了增加含有储能单元及智能用电设备的用户的长期收益,研究了储能系统能量调度及需求响应联合优化问题,对储能单元动作(充电,放电,闲置)及可延时负荷动作(接入,不接入)进行优化控制。建立包括用电经济性及满意度的优化目标函数,根据太阳能光伏发电、负载用电需求以及电网电价的随机特性,将该联合优化问题建模为无穷时段马尔可夫决策过程模型,进而引入Q学习算法对优化问题进行求解。仿真结果表明联合优化控制比单独对电池动作控制或者需求响应控制使用户获得了更高的长期收益。
关键词:智能电网;储能管理;需求响应;马尔可夫决策过程;强化学习
中图分类号:TP202????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1165-08
Joint Optimization Control of Energy Storage System Management and Demand Response
Gao Xueying, Tang Hao, Miao Gangzhong, Ping Zhaowu
(School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China)
Abstract: The joint optimization problem of energy management and demand response were studied in order to reduce the long-run cost of electricity users equipped with energy storage unit and smart applications, and to increase their benefits meanwhile. The goals were achieved by controlling both the energy storage unit (charging, discharging, or idle) and the load service (access or delay). Based on the random nature of solar photovoltaic, load demand electricity and electricity price, the joint optimization problem was modeled as infinite-horizon Markov decision process model, and Q-learning algorithm was proposed to find the optimal solution.Simulation results show that the joint control increases the user’s long-term income.
Keywords: smart grid; management of energy storage; demand response; MDP; reinforcement learning
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
永磁悬浮带式输送机侧向力与跑偏仿真分析
胡坤1,2,王爽2,郭永存1,2,李德永2
(1. 安徽理工大学安徽矿山机电装备协同创新中心,安徽 淮南 232001;2.安徽理工大学机械工程学院,安徽 淮南 232001)
摘要:在合理假设的基础上,对一种永磁悬浮带式输送机的磁悬浮支撑系统所受的侧向力数学模型进行仿真分析仿真结果表明磁性输送带所受的侧向力与偏移量呈单调递增关系,输送带若发生偏移,则会引起侧向力的增加,从而引起输送带的进一步跑偏。而传统物理防跑偏措施并不适用于悬浮非接触式支撑方式。为了有效地解决永磁悬浮带式输送机的磁性输送带跑偏问题,设计了一种自动调偏装置并提出了相应的控制策略,通过调整永磁磁场与输送带的横向相对位置来改变侧向力大小,从而控制永磁悬浮带式输送机的跑偏,进一步的仿真验证了其可行性。
关键词:永磁悬浮带式输送机;侧向力;跑偏;防跑偏
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1173-06
Analysis of Lateral Force and Deviation of Permanent Magnetic Levitation Belt Conveyor
Hu Kun1,2, Wang Shuang2, Guo Yongcun1,2, Li Deyong2
(1. Anhui Mine Electromechanical Equipment Cooperative Innovation Center, Anhui University of Science and Technology, Huainan 232001, China; GDrag8879环亚手机|首页主页
2. School of Mechanical Engineering, Anhui University of Science and Technology, Huainan 232001, China)
Abstract: On the basis of reasonable assumptions, lateral force mathematical model of permanent magnetic levitation belt conveyor maglev support system was simulated. The simulation results showed that conveyor lateral force and offset could have a monotonically increasing relationship. If the belt shifted, it would cause an increase in lateral force, which could cause conveyor belt further deviation. The traditional physical anti-deviation measures couldn’t apply to non-contact suspension support. In order to effectively solve the permanent magnetic levitation belt conveyor deviation problem, an automatic offset device was designed and the corresponding control strategy was proposed. The value of the lateral force was changed by adjusting the relative position of the permanent magnetic field and the belt, which would control the permanent magnetic levitation belt conveyor deviation. And its feasibility can be verified by the further simulation.
Keywords: permanent magnetic levitation belt conveyor; lateral force; deviation; anti-deviation
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
火焰自由基成像和极限学习机在NOx排放预测中的研究
李新利1,李楠1,孙愉佳1,卢钢2,闫勇1,2,刘石1
(1.华北电力大学控制与计算机工程学院,北京 102206;2.英国肯特大学工程与数字艺术学院,坎特伯雷,肯特 CT2 7NT,英国)
摘要:火焰自由基对深入了解燃烧机理起着重要作用。通过数字成像研究火焰自由基光谱特征,并利用该特征参数建立极限学习机(ELM, Extreme Learning Machine)模型,以试验数据与数字仿真相结合的方法实现在生物质燃烧中对NOx的排放在线预测。用电子倍增CCD(EMCCD)相机采集火焰中的四种自由基OH*,CN*,CH*和C2*数字图像,采用模糊C均值聚类法(FCM,Fuzzy C-Means)进行图像分割并提取特征值,结合燃烧火焰温度,利用极限学习机进行NOx排放预测建模。采用燃气燃烧试验炉上的试验数据验证了预测模型的有效性。
关键词:火焰自由基;数字图像处理;极限学习机;NOx排放;预测
中图分类号:TP183????? 文献标识码:A?? ????文章编号:1004-731X (2016) 05-1179-07
Research on Flame Radical Imaging and Extreme Learning Machine to Prediction of NOx Emissions
Li Xinli1, Li Nan1, Sun Yujia1, Lu Gang2, Yan Yong1,2, Liu Shi1
(1.School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China; GDrag8879环亚手机|首页主页
2.School of Engineering and Digital Arts, University of Kent, Kent CT2 7NT, UK)
Abstract: Flame radicals are crucial for an in-depth understanding of the combustion mechanisms. The spectral characteristics of flame radicals were studied based on digital imaging and feature extraction techniques. The information obtained was used to establish the extreme learning machine (ELM) model which can be used to predict the NOx emissions based on the experimental data and digital simulation from a biomass-gas-air combustion process. The digital images of four flame radicals, i.e., OH*, CN*, CH* and C2*, were collected using an EMCCD (Electron Multiplying Charge Coupled Device) camera. The image segmentation was performed using the fuzzy C-means (FCM) algorithm, and image features were extracted. Finally, the ELM model was built for the prediction of NOx emissions based on the radical features and flame temperture. The experimental data on a gas-biomass combustion test rig demonstrate the validity of the proposed ELM model.
Keywords: flame radical; digital image processing; extreme learning machine; NOx emissions; prediction
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
粒子群优化BP算法在液压系统故障诊断中应用
张扞东1,陶刘送2
(1.安徽工业大学,安徽 马鞍山 243000;2.安徽工业大学电气信息与工程学院,安徽 马鞍山 243000)
摘要:及时准确地对液压系统故障进行监测、预报和诊断具有重要意义。阐述了BP(Back Propagation)神经网络故障模型的基本理论知识,针对BP网络的缺点,提出了利用粒子群算法优化BP网络,建立起PSO (particle swarm optimization)优化BP网络故障诊断模型。以液压系统柱塞泵故障为例进行了神经网络建模,并对建立的网络进行仿真。仿真结果测试正确,表明PSO优化的BP网络用于液压系统故障诊断的实用性和可行性。
关键词:神经网络;故障诊断;粒子群算法;柱塞泵故障;仿真
中图分类号:TH 17????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1186-05
Application of PSO-BP Algorithm in Hydraulic System Fault Diagnosis
Zhang Handong1, Tao Liusong2
(1. Anhui University of Technology, Maanshan 243000, China;GDrag8879环亚手机|首页主页
2. Electrical Engineering and Information School, Anhui University of Technology, Maanshan 243000, China)
Abstract: It is of great significance to monitor, forecast and diagnose hydraulic systems’ fault timely and accurately. First, this paper describes the basic fault model theoretical knowledge of BP neural neystem failure neural network modeling has created and simulated. PSO-BP neural network has been raised, this paper has established PSO optimize model of the BP neural system fault diagnosis. BP network has been created and simulated in Plunger pump hydraulic system failure. The correct results indicate that this mixed PSO-BP algorithm is better than the improved BP algorithm, and can meet the requirements of Hydraulic system fault diagnosis.
Keywords: neural network; fault diagnosis; PSO; piston fault; simulation
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
船舶中压电力模拟试验系统AC/DC变换器仿真研究
夏鲲1,张硕1,袁印1,张平2
(1. 上海理工大学光电信息与计算机工程学院,上海 200093;2. 中国船舶重工集团公司第七一一研究所,上海 201108)
摘要:为在实验室环境下实现40 kW容量的船舶中压电力模拟试验系统,需要将380 V发电机组输出的交流电经电力变换得到稳定的4 kV直流输出。系统采用两级变换,前级AC/DC变换采用无桥boostPFC(Power Factor Correction)电路,后级DC/DC变换采用四路全桥PWM(Pulse Width Modulation)变换器级联进行升压,其中一路为移相全桥完成调压控制输出,三路为普通全桥得到固定电压输出。在MATLAB/Simulink环境下对该AC/DC变换器系统进行了系统建模,仿真结果表明,该方案能输出稳定的4 kV电压,效率94.8%,纹波2.08%。
关键词:AC/DC变换器;无桥boost型PFC电路;移相全桥变换器;级联变换器
中图分类号:TM89????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1191-06
Simulation Study of AC/DC Converter for Marine Medium Voltage Test Power System
Xia Kun1, Zhang Shuo1, Yuan Yin1, Zhang Ping2
(1. University of Shanghai for Science and Technology, Shanghai 200093, China;GDrag8879环亚手机|首页主页
2. Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China)
Abstract: In order to realize the simulation of marine medium voltage power system of 40kW capacity in laboratory, it is necessary to convert AC 380V of generators outputs to the stable 4kV DC output. Two level transformations were applied in the system. The bridgeless boost PFC circuit was applied in AC/DC conversion in front. Four roads of full bridge PWM converters in cascade mode were applied to boost the voltage in DC/DC conversion at the end. One of them was the phase-shift full bridge to achieve the control of adjusting voltage output. The other three bridges were common full bridge to get a stable voltage output. The simulation model of the AC/DC converter was established in MATLAB/Simulink circumstance. The simulation results show that it can output the stable 4kV DC voltage with 94.8% efficiency and 2.08% voltage ripple.
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
飞轮式汽车制动能量回收系统的研究
黄菊花1,王傅忠1,杨军平2
(1. 南昌大学机电工程学院,南昌 330031;2. 南昌工程学院机械与电气工程学院,南昌 330099)
摘要:针对发电机式制动能量回收系统仅能应用于新能源汽车的缺点,提出了一种可应用于传统汽车的飞轮式汽车制动能量回收系统设计了该系统的机械结构,阐释了它的工作原理Matlab-Simulink环境下建立了该系统的仿真模型,对它的工作原理以及影响制动能量回收效率的主要结构参数电磁离合器最大转矩、储能飞轮传动比及储能飞轮转动惯量进行了仿真计算仿真结果表明,在NEDC循环工况下,该系统能有效回收10%~14%的制动能量。研究结果可以为飞轮式汽车制动能量回收系统的开发和应用提供参考。
关键词:储能飞轮;制动能量回收;电磁离合器;能量回收效率
中图分类号:U463.53????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1197-09
Study on Flywheel Automotive-brake Energy Recovery System
Huang Juhua1, Wang Fuzhong1, Yang Junping2
(1. Nanchang University, Mechanical and Electrical Engineering, Nanchang 330031, China;GDrag8879环亚手机|首页主页
2. Nanchang Institute of Engineering, Mechanical and Electrical Engineering College, Nanchang 330099, China)
Abstract: The generator automotive-braking energy recovery system can only be applied to the new energy vehicles. In order to improve the situation, a kind of flywheel automotive-braking energy recovery system (FAERS) was proposed that could be applied to the traditional vehicles. The structure of the FAERS was designed and its working principle was explained in detail. The working principle of the FAERS and the main structural parameters—the maximum torque of the electromagnetic clutch, the transmission ratio of the energy storage flywheel and the rotational inertia of the energy storage flywheel were simulated in the environment of Matlab-Simulink, which greatly effected the system’s efficiency. The simulation results show that 10%-14% of the braking energy can be effectively recycled in the working condition of NEDC. This research results can provide a reference for development and application of the FAERS.
Keywords: energy storage flywheel; automotive-brake energy recovery; electromagnetic clutch; energy recovery efficiency
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
MIMO雷达中的CPCW设计及性能分析
申东1,李强1,刘昕2,周宇2
(1. 兰州交通大学电子与信息工程学院, 甘肃 兰州 730070;2. 西安电子科技大学雷达信号处理国家重点实验室, 陕西 西安 710071)
摘要:基于混沌相位编码波形(chaotic phase coding waveform,CPCW)的良好相关性和随机性,提出了用CPCW提高多发多收(multiple-input multiple-output,MIMO)雷达目标检测性能的方法。通过对混沌序列的均匀量化、四相编码得到CPCW。比较4CPCW的相关性,选取较长的Tent相位编码波形提高MIMO雷达的目标检测性能,特别是对相邻弱小目标的检测性能。同时,基于CPCW建立多脉冲压缩累积信号处理模型。该模型能够有效降低混沌波形的互相关和自相关旁瓣,提高MIMO雷达的目标检测性能,特别是对相邻弱小目标的检测性能。最后的仿真结果表明了该方法的有效性。
关键词:MIMO雷达;混沌序列;相位编码波形;目标检测
中图分类号:TN957.51????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1206-07
CPCW Design and Performance Analysis for MIMO Radar
Shen Dong1, Li Qiang1, Liu Xin2, Zhou Yu2
(1. School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;GDrag8879环亚手机|首页主页
2. National Key Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China)
Abstract: Based on the good correlation and random property of chaotic phase coding waveform (CPCW), a method is proposed to increase the target detection performance of multiple-input multiple-output (MIMO) radar with CPCW. CPCW can be generated by uniform quantifying and quadriphase coding for chaotic sequences. Comparing the correlation property of four kinds of CPCW, the longer Tent phase coding waveform is chosen to increase the target detection performance of MIMO radar, especially for the close small target. Meanwhile, signal processing model is built by CPCW, and multiple pulse compression accumulation can help to reduce the cross-correlation and auto-correlation sidelobes of chaotic waveforms effectively, and then the target detection performance of MIMO radar is increased, especially for the close small target. Simulation results show the proposed method effectiveness.
Keywords: MIMO radar; chaotic sequences; phase coding waveforms; targets detection
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
防暴头盔致头面部积热影响因素的仿真研究
庄弘炜1,项德海2,赵法栋1,庄维伟1
(1.武警工程大学装备工程学院,西安 710086;2.武警杭州士官学校军械系,杭州 310000)
摘要:针对高温炎热天气佩戴防暴头盔给官兵头面部带来的严重积热问题,基于真人头部CT影像数据和《GA294-2012防暴头盔》标准构建了人体头部和防暴头盔的三维几何模型;选取经典Pennes生物传热方程作为控制方程,建立了-防暴头盔的传热模型,在ANSYS-Fluent软件平台下对-防暴头盔系统的三维热学过程进行了数值模拟,在此基础上分析了头盔壳体材料、头盔缓冲层材料、通风孔设计对头面部积热的影响。结果表明:PC(聚碳酸酯),ABS(丙烯腈-丁二烯-苯乙烯)和HDPE(低压聚乙烯) 3种壳体材料下的头面部温度分布差异较小;缓冲层材料的导热系数对头面部温度分布影响较大;在防暴头盔上设计通风孔可有效降低头面部温度。
关键词:防暴头盔;积热;CT影像;仿真;温度场
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 05-1213-06
Research on Influence Factors of Head and Face’s Heat Accumulation in Anti-riot Helmet Based on Simulation
Zhuang Hongwei1, Xiang Dehai2, Zhao Fadong1, Zhuang Weiwei1
(1. Equipment Engineering College, Engineering University of CAPF, Xi’an 710086, china;
2. Department of Armament, Hangzhou Noncommissioned Officer Academy of CAPF, Hangzhou 310000, China)
Abstract: Aiming at the serious heat accumulation problem to soldiers’ head and face while wearing anti-riot helmets in high temperatures, a 3D model of human head and an anti-riot helmet were established based on CT image data and GA294-2012 Standard of Anti-riot Helmet. The Pennes bio-heat transfer equation was chosen as the control equation, then a "head-helmet" heat transfer model was built. On the platform of ANSYS-Fluent software, the three-dimensional thermal process of "head-helmet" system were numerically simulated. And on the basis the influence brought from anti-riot helmet shell material, buffer layer material and vent hole to head facial heat accumulation were analyzed. The results show that the diversity of head and face’s temperature distribution is not obvious among PC, ABS and HDPE shell material, while the thermal conductivity of buffer layer material makes great influence on head and face’s temperature distribution. The head facial temperature can be effectively reduced when vent holes are devised on anti-riot helmet.
Keywords: anti-riot helmet; heat accumulation; CT image; simulation; temperature field
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
双光楔扫描激光成像系统三维动态仿真
马杰1,余巍1,周志伟2,杨文秀1,吴学刚1
(1. 华中科技大学自动化学院多谱信息处理技术国家级重点实验室,武汉 430074;2. 天津津航技术物理研究所,天津 300384
摘要:双光楔扫描是具有广泛应用前景的下一代激光扫描工作体制,由于双光楔扫描具有独特的工作模式和成像特性,其成像数据受参数、环境影响较大,因而对该扫描体制激光成像系统数据的时间、空间特性进行研究具有重要的理论和实际应用价值。针对双光楔扫描机制的成像原理,对双光楔扫描激光成像过程进行三维、动态的建模并设计仿真平台变得十分关键。同时,对不同成像参数及环境条件下的成像数据进行仿真生成点云数据分析不同场景下扫描数据的成像特性也具有特殊意义。运用仿真结果来验证三维目标检测和识别算法的性能,对双光楔扫描激光成像系统的设计和研制具有参考价值。
关键词:双光楔;激光成像系统;三维点云;动态仿真
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1218-07
3D Dynamic Simulation of Dual Wedge Scanning Imaging System
Ma Jie1, Yu Wei1, Zhou Zhiwei2, Yang Wenxiu1, Wu Xuegang1
(1. National Key Laboratory of Science and Technology on Multi-Spectral Information Processing, School of Automation,GDrag8879环亚手机|首页主页
Huazhong University of Science and Technology, Wuhan 430074, China; 2. Tianjin Institude of Technical Physics, Tianjin 300384, China)
Abstract: Dual wedge scanning is a broad prospect method of next generation Laser imaging system. Due to the unique scanning mode and imaging characteristics, data of dual wedge Laser imaging system is sensitive to parameters and environment, and it is significant in both theory and application to research its feature of time and space. Based on the imaging principle of dual wedge scanning, the dynamic imaging process was modeled and a simulation system in three-dimensional environment was designed. Based on the imaging principle of dual wedge scanning, the dynamic imaging process was modeled and a simulation system in three-dimensional environment was designed. Then the point cloud data simulated in different scenes of distinct parameters was analyzed in several aspects. The research result can be used to verify the performance of the three-dimensional object detection and recognition algorithms, in addition, it has reference value for design and development of the dual wedge scanning Laser imaging system.
Keywords: dual wedge; Laser Imaging System; three-dimensional point cloud; dynamic simulation
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于SRCLCD的行波检测故障定位方法
高艳丰1,2,朱永利1,闫红艳2,张媛媛1
(1. 华北电力大学新能源电力系统国家重点实验室,河北 保定 071003;2. 河北工程大学水电学院,河北 邯郸 056038)
摘要:故障行波检测的准确性是输电线路行波测距的关键之一。从减少量化误差着手,兼顾信号分解的真实性,提出一种基于采样率转换 (Sampling Rate Conversion, SRC)和局部特征尺度分解(Local Characteristic scale Decomposition, LCD)相结合的故障行波检测方法。对某一采样频率的电流线模分量进行采样率转换,实现对重构信号的重采样;对重采样信号进行局部特征尺度分解,利用Teager能量算子提取首个内禀尺度分量的瞬时频率,确定故障初始行波到达检测点的时刻;利用三测点行波定位算法计算故障点位置。仿真验证了该方法的正确性和准确性。
关键词:输电线路;行波测距;量化误差;采样率转换;局部特征尺度分解
中图分类号:TM726????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1225-08
Traveling Wave Detection Fault Location Method Based on SRC and LCD
Gao Yanfeng1,2, Zhu Yongli1, Yan Hongyan2, Zhang Yuanyuan1
(1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University,GDrag8879环亚手机|首页主页
Baoding 071003, China; 2. Hebei University of Engineering, Handan 056038, China)
Abstract: The accuracy of fault detection by traveling wave is a key for distance measurement on transmission lines. A new traveling wave detection method was proposed based on SRC (Sampling Rate Conversion) and LCD (Local Characteristic scale Decomposition), which considered quantization error reduction and the signal decomposition. The sampling rate of the current line mode components with fixed sampling rate was converted to realize resampling of reconstructed signal. The local characteristic scale of resampling signal was decomposed and the instantaneous frequency of the first intrinsic scale component was calculated by using Teager energy operator, which identified the moment of fault first traveling wave arriving detecting point. The fault location was calculated with three points traveling wave localization algorithm. Simulation results verify the proposed method validity and accuracy.
Keywords: transmission lines; traveling wave location; quantization error; sampling rate conversion; local characteristic scale decomposition
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
基于混沌识别的振动压实系统动态设计分析
沈培辉1,林述温2
(1.福建船政交通职业学院机械工程系,福州 350007;2.福州大学机械工程及自动化学院,福州 350002)
摘要:针对传统的简单动态设计方法,在研究压实系统中忽略非线性混沌态振动对人体身心健康的影响,提出基于系统混沌识别的动态设计方法。通过建立振动压实系统的二自由度动力学模型,采用周期取点构建混沌识别分叉图方法,分析在物料压实初、中、后期3种不同的土壤参数情况下的压实系统非线性振动响应。研究表明,选取机架质量为振动轮质量的0.85~1倍、机架振动固有频率为8~9.5和阻尼比系数为0.195~0.215时,可以弱化系统的非线性特性从而避开混沌振动区。
关键词:振动压路机;动力学模型;混沌振动;动态设计
中图分类号:TU663????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1232-10
Dynamic Design for Vibratory Compaction System Basing on Chaos Identification
Shen Peihui1, Lin Shuwen2
(1. Department of Mechanical Engineering, Fujian Chuanzheng Communications College, Fuzhou 350007, China;GDrag8879环亚手机|首页主页
2. College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350002, China)
Abstract: According to the shortage of traditional design method and the fact that the effects of nonlinear chaotic vibration on human health were ignored in the research of compaction system, a dynamic design method basing on chaos identification was proposed. A two degree of freedom dynamic model was established and the bifurcation diagrams were described for vibratory compaction system. The dynamic responses of the system were analyzed in the cases of three different soil parameters representing the early, medium and later stage of compacted material. Research shows that, selecting the ratio of the frame quality and the vibration wheel quality in the range from 0.85 to 1, the natural frequency of frame in the range from 8 to 9.5 and the damping ratio in the range from 0.195 to 0.215 can weaken the nonlinear characteristics of the system so as to avoid chaotic vibration as much as possible.
Keywords: vibratory roller; dynamic model; chaotic vibration; dynamic design
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
一种矩阵变换器网侧功率因数控制策略
国海,权悦,孙雯,范智平
(安徽科技学院,安徽 凤阳233100)
摘要:矩阵变换器的调制策略未考虑网侧滤波器的影响,仅能控制变换器输入侧电流与电网电压相位一致,而滤波器电容电流使得网侧电流相位超前,降低了变换器网侧功率因数。针对该问题,研究了矩阵变换器的数学模型,分析了网侧实际功率因数角与系统参数之间的关系,提出一种网侧电流闭环控制策略,该策略以同步旋转坐标系下网侧电流为控制目标,通过调整变换器输入测电流来间接控制网侧电流,实现网侧功率因数的准确控制。仿真结果表明该策略能在全功率范围内使网侧保持较高功率因数,提高系统效率。
关键词:矩阵变换器;输入滤波器;电流闭环;功率因数
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 05-1242-05
Grid Side Power Factor Control Strategy for Matrix Converter
Guo Hai, Quan Yue, Sun Wen, Fan Zhiping
(Anhui Science and Technology University, Fengyang 233100, China)
Abstract: Since input filter is usually ignored in the modulation strategy for matrix converter, only the input current of converter is controlled in the same phase with grid voltage. Phase advance of grid current will come about as a result of current of capacitor and the power factor of grid side will be reduced. To solve this problem, the mathematical model of matrix converter was analyzed and the relationship between the real power factor and parameters of the system was studied. A grid current closed-loop control strategy was proposed. As the control objective of the strategy, the grid current was indirectly controlled by adjusting the input current of converter. In this way, the power factor of grid side was able to be controlled correctly. The effectiveness and feasibility of the new control method were confirmed by the simulation results, the power factor keeps high regardless of the system power.
Keywords: matrix converter; input filter; current closed-loop; power facto
?
来顶一下
近回首页
返回首页
推荐资讯
相关文章
    无相关信息
栏目更新
栏目热门