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2016年第12期

时间:2016-12-08 16:02:13??来源:??作者:

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基于WiFi的混合定位算法研究
殷富成,吴栋,王艳,纪志成
(江南大学物联网技术应用教育部工程研究中心,无锡 214122)
摘要:针对在WiFi环境下使用TDOA(Time Difference of Arrival)AOA(Time of Arrival)算法对移动终端进定位时需要添加额外硬件且定位精度不够高的问题,提出了一种TDOAAOE混合定位算法。该方法不使用信号到达角而使用信号发出角AOE(Angle of Emission, AOE)信息进行定位,通过电机带动有向天线旋转,并将有向天线的角度信息编码到信标中,移动终端获取信标后解码即可完成定位,以此代替了测量信号角度的传感器。同时,该方法将TDOA时间差的思想融合到了AOE测量中,减小了角度测量误差。实验结果表明,TDOAAOE混合定位算法与TDOAAOA算法相比,具有更好的定位性能。
关键词:WiFiTDOA算法;AOE算法;定位技术
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2879-08
DOI: 10.16182/j.issn1004731x.joss.201612001
Investigation of Hybrid Positioning Algorithm Based on WiFi
Yin Fucheng, Wu Dong, Wang Yan, Ji Zhicheng
(Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Wuxi 214122, China)
Abstract:TDOA(Time Difference of Arrival) and AOA(Angel of Arrival) methods require additional sensing mechanisms and have poor positioning accuracy used in WiFi environment, so a novel TDOAAOE hybrid positioning algorithm was proposed. The proposed algorithm used the AOE (Angle of Emission) information instead of AOA information to estimate the position of a WiFi-based mobile terminal. In this method, access points emitted signals with angle information encoded in beacon packets through directional antennas; which was rotated by motors. WiFi-based mobile devices estimated angles of the access points by receiving and decoding these beacon packets, which calculated the position themselves. This method integrated time-difference idea of TDOA method to decrease the angular measuring error without any additional sensors. Simulation results indicate that the proposed hybrid algorithm performs much better than TDOA and AOA method in terms of positioning accuracy and deployment costs.
Keywords: WiFi; TDOA algorithm; AOE algorithm; positioning technique
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一种自适应多种群的PSO算法
夏学文1,王博建1,金畅1,何国良2,谢承旺1,魏波1
(1. 华东交通大学软件学院,智能优化与信息处理研究所,江西南昌 3300132. 武汉大学计算机学院,湖北武汉 430079)
摘要:针对粒子群算法易早熟收敛、逃离局部最优能力差、精度低等缺点,提出了一种自适应多种群PSO算法(Self-adaptive Multi-swarm Particle Swarm OptimizationSMPSO)算法通过多个子种群独立进化和自适应重组操作既保持了种群多样性又实现了子种群间的信息共享与交互同时,通过对粒子历史最优解进行周期性采样与统计,进而指导算法进行探测操作,不仅增强算法的全局搜索能力,也提高其跳出局部最优的能力;最后,引入了两种局部搜索策略提升了算法的收敛速度和求解精度。通过和其它PSO算法在标准测试函数和工程应用的实验对比表明,SMPSO在逃逸能力、收敛速度和求解精度上有显着提高。
关键词:粒子群算法;多种群;自适应;探测操作;局部搜索
中图分类号:TP301????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2887-10
DOI: 10.16182/j.issn1004731x.joss.201612002
Self-adaptive Multi-swarm Particle Swarm Optimization Algorithm
Xia Xuewen1, Wang Bojian1, Jin Chang1, He Guoliang2, Xie Chengwang1, Wei Bo1
(1. Intelligence optimization & Information Process Lab., East China Jiaotong University, School of Software, Nanchang 330013, China; NhHag8879环亚手机|首页主页
2. School of Computer, Wuhan University, Wuhan 430079, China)
Abstract:To overcome the shortcomings of poor ability to escape a local optimal, premature convergence and low precision of the traditional particle swarm optimization algorithm (PSO), a self-adaptive multi-swarm particle swarm optimization (SMPSO) was proposed. In SMPSO, the whole population was divided into many parallel-evolution multi-swarms, the aim of which was to keep diversity of the population. Furthermore, a self-adaptive regrouping operator was proposed to reinforce the information sharing and interaction between different swarms. In addition, particles’ historical information were periodic sampling and the statistics results were used to direct the best solution to carry out a detecting operator. The aim of the strategy was to improve PSO’s global searching ability and to help the population escape a local optimal solution. To accelerate convergence speed and improve solutions’ accuracy of PSO, two local search strategies were proposed. The comparisons of SMPSO with other five PSO algorithms on some benchmark functions and an engineering application indicate that the proposed strategies can effectively enhance the ability of escaping local optimal solution, and speed up the convergence and raised solutions’ accuracy.
Keywords: particle swarm optimization; multi-swarm; self-adaptive; detecting operator; local search
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多圆形随机分布覆盖面积的精确算法及仿真
张烨,刘魁,陈余植,刘俊杨,杜建超
(浙江工业大学机械工程学院,杭州 310014)
摘要:当一定区域内随机分布的多个等面积的圆形发生重叠时,计算所有圆形构成的曲边多边形面积之和目前需要一种精确算法。算法主要解决了多圆重合面积的计算原则多圆重合的判断和筛选曲边多边形面积计算等技术难点,根据容斥原理,在总面积中根据多圆重合数的奇偶性加上或减去多圆重合面积,同时还给出了计算机求解的详细实现流程。由于该问题圆形分布的随机性,每次重新部署时面积覆盖率并不相同,为了实际应用的需要,还对多圆形随机多次部署的面积覆盖率分布问题进行了仿真分析。
关键词:多圆形;随机分布;精确算法;置信度
中图分类号:TP391.9?????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2896-07
DOI: 10.16182/j.issn1004731x.joss.201612003
Precisely Algorithm and Simulation of Plurality of Random Deployed Circulars’ Total Coverage Area
Zhang Ye, Liu Kui, Chen Yuzhi, Liu Junyang, Du Jianchao
(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)
Abstract: A precisely algorithm of total coverage area when a plurality of circulars are random deployed and overlapping with each other is needed. The key issues of the solution are the calculating principle of the overlapping area, the differentiation and enumeration of the multi-overlapping circulars, and the calculation of the multi-shaped curved edges. Based on the inclusion-exclusion principle, overlapping area was added or subtracted to the amount area. The computer calculation process was proposed. Because the circulars are random deployed, in order to ensure the area coverage, the area cover rate problem of repeatedly deployment of the circulars were simulated and analyzed.
Keywords: a plurality of circular; random deployed; precisely algorithm; confidence level
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Blind Image Quality Assessment Based on Natural Scene Statistics
Li Haiyang1,2, Cao Weiguo1,2, Li Shirui1,2, Tao Kelu1,2, Li Hua1,2
(1. Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190, China; NhHag8879环亚手机|首页主页
2. University of Chinese Academy of Sciences, Beijing, 100049, China)
Abstract:Nowadays blind/referenceless image spatial quality evaluator (BRISQUE) based on natural scene statistics is one of the state-of-the-art no-reference algorithms. But it only analyzes the original image and ignores the difference of the features constructed. Here an improved algorithm BRISQUEs is proposed and implemented by three steps. First, we apply mean subtracted contrast normalized to the gradient images and construct a new feature vector to assess quality. Second, we weight some key features of BRISQUE to improve assessment. After the two assessments obtained, a further average is made to weaken the bias from different assessments. Through the experiments on the LIVE IQA database, our approach has a remarkable performance than previous no-reference algorithms and is statistically superior to the popular mult i-scale structural similarity index.
Keywords:no-reference image quality assessment; natural scene statistics; gradient image; key feature
基于自然场景统计的无参考图像质量评价
李海洋1,2,曹伟国1,2,李诗锐1,2,陶克路1,2,李华1,2
(1. 中国科学院计算技术研究所智能信息处理重点实验室,北京 100190;2. 中国科学院大学,北京 100049)
摘要:目前基于自然场景统计的无参考图像质量评价方法BRISQUE算法(Blind/Referenceless Image Spatial Quality Evaluator)这类算法的典型代表;但它仅在原始图像基础上做统计分析,且忽略了各特征间的差异性。由此提出了新的改进算法BRISQUEs,并通过三个步骤实现:将被测图像的梯度图做去均值对比归一化处理,在此基础上构造新的特征向量来评价图像质量;将BRISQUE中的关键特征进行适当加权,并对图像再次评价;平均上述两次评价来进一步降低算法的偏差。通过LIVE数据库上的实验,BRISQUEs的统计评价性能明显好于之前的无参考评价算法,也要优于多尺度结构相似度指标。
关键词:无参考质量评估;自然场景统计;梯度图;关键特征
中图分类号:TP391.9????? 文献标识码:A????? 文章编号:1004-731X (2016) 12-2903-09
DOI: 10.16182/j.issn1004731x.joss.201612004
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基于刻痕的云南绝版套刻的数字模拟合成
李杰,侯剑侠,王雪松,徐丹,普园媛
(云南大学,云南省 昆明 650091)
摘要:木刻版画是一种以刀为笔,以板为纸的绘画艺术,云南绝版套刻是它的一种延伸。通过在同一块木板上的多次套印而产生色彩重叠的效果。结合云南绝版套刻的创作过程,我们提出一种自动化的基于刻痕的云南绝版套刻的数字模拟合成方法。通过颜色聚类将图像分割,求出一个平滑的反应图像梯度变化的向量场,根据向量场自动生成均匀分布的流线图,再在流线图上放置刻痕,结合XDOG方法生成的风格化边缘完成图像的绘制。由于使用了取自于真实木刻画中的刻痕,避免了复杂的建模与计算,绘制过程简单快速,无需复杂的人机交互,模拟结果较好。
关键词:云南绝版套刻;版画;向量场;XDOG
中图分类号:TP391????????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2912-06
DOI: 10.16182/j.issn1004731x.joss.201612005
Digital Simulation and Synthesis of Yunnan Out-of-print Woodcuts Based on Nicks
Li Jie, Hou Jianxia, Wang Xuesong, Xu Dan, Pu Yuanyuan
(Yunnan University, Kunming 650091, China)
Abstract: Woodcut printing is a painting, in which knife and wood block are used instead of pen and paper. Yunnan out-of-print woodcut is an extension of the woodcut printing. By working with a single block and multiple printings, Yunnan out-of-print woodcut can produce special effects of color overlap. Following the working process of it, an automatic method was studied based on nicks to synthesize a virtual Yunnan out-of-print woodcut. Image was sliced out by using color clustering. A global orientation field was got which reflected the gradient information. Real nicks guided by streamlines was placed based on orientation field. The image rendering was finished by using stylized edges which were got from XDOG. Because nicks from real woodcuts were used, the complicated calculations and modeling could be avoided. The rendering is simple and efficient, while the simulated result looks good.
Keywords: Yunnan out-of-print woodcuts; woodcuts; orientation field; XDOG
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机场地面交叉口冲突概率估计模型
潘卫军1,罗小林2,康瑞1,黄宸宇1,夏正洪1,邱文彬3
(1.中国民用航空飞行学院,四川 广汉 618307;2.中国民用航空西北地区空中交通管理局,陕西 西安 710082;NhHag8879环亚手机|首页主页
3.中国民用航空西南地区空中交通管理局,四川 成都 610202)
摘要:为提高机场地面运行安全,预防航空器产生滑行冲突,研究了基于航空器特性的机场地面交叉口冲突概率并建立了相应的估计模型。该模型将发动机喷流影响有效距离因素引入到交叉口冲突范围中,描述了航空器滑行冲突的过程。结合实际运行数据对模型进行了验证和数据分析,探讨了速度区间对模型的影响。模型针对三种运动状态航空器滑行冲突概率的变化进行分析,当速度变化区间为0.5 m/s时,冲突概率分析较为理想,能在贴近客观实际的前提下较好地提高冲突概率计算的准确性。仿真结果表明:减速等待避让策略能够有效减小航空器冲突概率,预防事故的发生;该模型能实时计算航空器的冲突概率,可用于航空器地面冲突预警。
关键词:空中交通管理;机场地面交叉口;速度区间;冲突概率
中图分类号:V355 ?????文献标识码:A?????? 文章编号:1004-731X (2016) 12-2918-07
DOI: 10.16182/j.issn1004731x.joss.201612006
Assessment Model of Conflict Probability at Airport Surface Intersection
Pan Weijun1, Luo Xiaolin2, Kang Rui1, Huang Chenyu1, Xia Zhenghong1, Qiu Wenbin3
(1. Civil Aviation Flight University of China, Guanghan 618307, China;NhHag8879环亚手机|首页主页
2. Northwest Regional Air Traffic Management Bureau of Civil Aviation of China, Xi’an 710082, China;NhHag8879环亚手机|首页主页
3. Southwest Regional Air Traffic Management Bureau of Civil Aviation of China, Chengdu 610202, China)
Abstract: Based on aircraft characteristics, the assessment model of conflict probability at airport surface intersection was studied to ensure the safety of airport ground safety. The engine jet effect distance was introduced to expand the scope of intersection conflict, describing the process of aircraft conflict. The model with the actual operation data was verified, and the speed interval's impact on the model was analyzed and discussed. In the viewof three motion states of aircraft, this model analyzed the variations in conflict probability. When speed variation range is 0.5m/s, probability analysis of the conflict is more ideal, and can improve the accuracy of calculating the probability of conflict under the premise of objective reality. The results show that: decelerating and holding avoidance measures can reduce the aircraft conflict probability effectively, thus defending the occurrence of accidents. This method can accurately calculate the conflict probability of aircraft, suitable for aircraft ground conflict alert.
Keywords: air traffic management; airport surface intersection; speed range; conflict probability
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Effective T2FPSO-Based T2FSVM Scene Classification Algorithm
Xu Shuqiong, Yuan Conggui
(Dongguan Polytechnic, Dongguan 523808, China)
Abstract:A systematic design methodology of Type-2 Fuzzy Particle Swarm Optimization (T2FPSO) based Type-2 Fuzzy Support Vector Machine (T2FSVM) classification system was proposed for scene image to improve selectivity and robustness in the machine vision. In the novel classification system, the T2FSVM model was presented to realize a comprehensive learning of the correct class and show the superiority of the generalization capability for classification problem. Furthermore, in order to improve the performance of PSO on complex uncertain environments, the type-2 fuzzy concept was incorporated to PSO to construct T2FPSO searching algorithm, in which the interval type-2 fuzzy inertia weight was designed using an Interval Type-2 Fuzzy Logic System (IT2FLS). Experimental studies indicate that the T2FPSO-T2FSVM approach is effective to deal with uncertainties for scene classification, when scene images are corrupted by the hybrid noises or captured by different view angels and light conditions.
Key words:scene classification; type-2 fuzzy particle swarm optimization (T2FPSO); type-2 fuzzy support vector machine (T2FSVM); type-2 fuzzy logic system (T2FLS)
一种基于T2FPSOtype-2模糊支持向量机场景分类方法
徐淑琼,袁从贵
(东莞职业技术学院,广东东莞 523808)
摘要:为提高机器视觉识别的选择性和鲁棒性,给出了基于T2FPSO优化的T2FSVM场景分类方法。算法中,设计了type-2模糊支持向量机模型以提高其泛化能力并得到正确的场景分类信息;为提高PSO在不确定环境中的优化能力,构建了融合type-2模糊集概念的T2FPSO优化算法,并采用区间type-2模糊逻辑系统推理得到其惯性权值。实验结果表明所提出的场景分类方法可对不确定信息进行有效处理。
关键词:场景分类;type-2模糊粒子群优化;type-2模糊支持向量机;type-2模糊逻辑系统
中图分类号:TP391.9????? 文献标识码:A????? 文章编号:1004-731X (2016) 12-2925-09
DOI: 10.16182/j.issn1004731x.joss.201612007
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流线增强型线性积分卷积流场可视化
韩敏,张海超,边茂松,郑丹晨
(大连理工大学电子信息与电气工程学部,辽宁 大连 116023)
摘要:为全面清晰地展示出流场信息,减小线性积分卷积的计算量,提出一种流线增强型线性积分卷积方法。改进算法中流线生成部分:检测临界点位置并绘制渐变临界点区域,根据积分点所在区域结合不同的积分方法,并自适应更新积分步长。利用GPU的并行能力及使用GLSL (OpenGL Shading Language),进一步增加输出图像的清晰度。仿真结果表明,该算法能够提高渲染速度同时保持可视化结果的清晰度,并利用改进的线性积分卷积方法对河流以及旋风流场进行可视化,以图像形式直观形象地展示流场分布信息。
关键词:流场可视化;线性积分卷积;临界点检测;GPU
中图分类号:TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2933-06
DOI: 10.16182/j.issn1004731x.joss.201612008
Flow Visualization Based on Enhanced Streamline Line Integral Convolution
Han Min, Zhang Haichao, Bian Maosong, Zheng Danchen
(Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116023)
Abstract: In order to show the flow information clearly and reduce the calculation of linear integral convolution, an enhanced streamline linear integral convolution algorithm was proposed. The generation of streamlines were improved. Critical points were detected and the points’ area with a gradient fill was generated. Combined two integration methods in different areas, the integration step was updated adaptively. Utilizing the parallelism of GPU and GLSL (OpenGL shading language), the algorithm further improved the sharpness of the output image. Experiments show that the improved linear integral convolution algorithm posses both the speedability and the precision. And the flow visualization of the river and hurricane with this improved method can show the flow field information intuitively.
Keywords: flow field visualization; line integral convolution; critical points detection; GPU
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非周期信号LCRC滤波的数值分析研究
周靖,周建斌,洪旭,马英杰,王敏,周伟
(成都理工大学核技术与自动化工程学院,成都 610059
摘要:数值方法将LCRC滤波电路用于直流电源输出电压中非周期信号的滤波分析采用微分方程数值解方法求解电路微分方程数值递推解,从而建立电路的数值模型,该模型可用于对非周期信号滤波的定量分析中。发现了LCRC滤波电路在对直流电源输出电压进行滤波时的不足,通过引入LRC滤波电路,数值仿真结果表明,该电路能克服单独使用LCRC滤波电路时的不足,能够同时对纹波和噪声都能很好地滤除。提出了在实际应用中对直流电源输出电压中非周期信号进行滤波时,应采用LRC滤波电路取代LCRC滤波电路。
关键词:LC滤波电路;LRC滤波电路;非周期信号;数值化模型;数值分析
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2939-07
DOI: 10.16182/j.issn1004731x.joss.201612009
Numerical analyses and research of LC and RC filter circuits for nonperiodic signal
Zhou Jing, Zhou Jianbin, Hong Xu, Ma Yingjie, Wang Min, Zhou Wei
(College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China)
Abstract:With a numerical method, LC and RC filter circuits were used to the nonperiodic signal filtering analyses in DC power output voltage. By applying the method of numerical solution of differential equation, the numerical recursive solution of circuit differential equations could be obtained, thus, numerical models of circuits could be established. The numerical models could be used to the quantitative analysis of nonperiodic signal. The defects of LC and RC filter circuits in DC power output voltage filtering were indicated, LRC filter circuit was introduced, and numerical simulation results show that this circuit can overcome the defects of LC and RC filter circuits, thus, ripple and noise can be mostly filtered. It’s proposed that LC and RC filter circuits should be replaced by LRC filter circuit in the practical application of DC power output voltage nonperiodic signal filtering.
Keywords: LC filter circuit; LRC filter circuit; nonperiodic signal; numerical model; numerical analysis
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基于改进混沌自适应粒子群神经网络的磨矿粒度软测量
周颖1,2,赵慧敏1,陈阳1,王龙1
(1. 河北工业大学控制科学与工程学院,天津 300130;2. 河北省控制工程技术研究中心,天津 300130)
摘要:针对磨矿粒度难以实现直接在线测量且化验过程滞后的难题,结合一段磨矿回路的特性,提出基于改进的混沌自适应粒子群优化算法和BP神经网络结合的磨矿粒度软测量模型,本算法利用混沌理论的遍历性和粒子群较强的全局最优搜索能力的优点,自适应的调整BP网络的权值,避免网络陷入局部最优。通过MATLAB仿真表明,改进的混沌自适应PSO-BP神经网络与PSO-BP神经网络和CPSO-BP神经网络相比较,其测量精度明显提高,且网络具有较强的收敛性能和优化能力,结果表明所提出方法的有效性。
关键词:混沌;粒子群优化;神经网络;磨矿粒度;软测量
中图分类号:TP18??????? 文献标识码:A??????? 文章编号:1004-731X (2016) 12-2946-05
DOI: 10.16182/j.issn1004731x.joss.201612010
Soft Sensor of Particle Size of Grinding Process Based on Improved CSAPSO Neural Networks
Zhou Ying1,2, Zhao Huimin1, Chen Yang1, Wang Long1
(1. School of Control Science and Engineering, Hebei University of Technology, Tianjin 300130, China;NhHag8879环亚手机|首页主页
2. Hebei Control Engineering Research Center, Tianjin 300130, China)
Abstract:Aiming at the problems that the particle size can’t be measured online and the offline analysis by lab sample existing in large-time delay, by combining the characteristics of the one stage grinding circuit, the soft sensor model of particle size was proposed by the combination of improved chaotic self-adaptive particle swarm optimization and BP neural network algorithm. Taking advantages of chaotic theory ergodicity and PSO global optimal searching ability, the algorithm above couldadjust the weights of BP network adaptively and avoid falling into the local optimum. As a result of MATLAB simulation, the measurement accuracy of the improved CSAPSO-BP NN is higher than the PSO-BP NN and CPSO-BP NN, and it also has better ability of convergence and optimization performance. To sum up, the proposed soft sensor approach is efficient.
Keywords: chaos; particle swarm optimization; neural network; particle size; soft-sensor
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交错角与半径比对组合型垂直轴风轮影响仿真
傅秀聪1,2,梁小婷2,4,欧宝星1,吴池力1,赵汝恒1, 2,李跃鹏1,皮开红3,肖帅3
(1.广州市香港科大霍英东研究院,广东 广州 511458;2.香港科技大学,香港;NhHag8879环亚手机|首页主页
3.广州红鹰能源科技股份有限公司,广东 广州 510800;4.国科天地科技有限公司,北京 100089)
摘要:Darrieus-Savonius组合型垂直风轮可有效改善单一型垂直轴风力机性能。为探究半径比和交错角对组合风轮性能的影响和其最优参数组合,对多组半径比和交错角参数组合下的组合风轮的气动特性进行仿真研究。数值模拟计算基于二维非定常不可压缩流体,采用Realizable k-ε湍流模型。结果表明,半径比越大,周期内输出的正力矩值(力矩值≥0)所占比例越大;在不同的半径比下,交错角存在最优值使得组合风轮运行在高尖速比区域,并功率系数最高。
关键词:组合型;垂直轴风力机;交错角;半径比;数值模拟
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2951-08
DOI: 10.16182/j.issn1004731x.joss.201612011
Numerical Simulation Study of Impact of Stagger Angle and Radius Ratio on Performance of Combined Type VAWT
Fu Xiucong1,2, Liang Xiaoting2,4, Ou Baoxing1, Wu Chili1, Zhao Ruheng1,2, Li Yuepeng1, Pi Kaihong3, Xiao Shuai3
(1. Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou 511458, China; 2. Hong Kong University of Science and Technology,NhHag8879环亚手机|首页主页
Hong Kong, China; 3. Guangzhou Hong Ying Energy Technology Co., Ltd., Guangzhou 510800, China;NhHag8879环亚手机|首页主页
4.Guoke Tiandi Science and Technology Co., Ltd., Beijing 100089, China)
Abstract: Darrieus-Savonius combined rotor could effectively improve the performance of sole type vertical axis wind turbine. In order to investigate the impacts of radius ratios and stagger angles on the combined rotor, and their best combination, aerodynamic simulations of different radius ratios and stagger angles were studied. The numerical simulation is based on 2D unsteady incompressible air model and realizable k-ε turbulence model. The result indicates that the radius ratio represents the occupied swept area of Savonius rotor, the larger radius ratio, the higher proportion of the positive momentum outputs (M≥0) in a rotation period. In addition, there exists an optimal stagger angle under a specific radius ratio making the turbine operate in higher tip speed ratio zone with maximum power coefficient.
Keywords: combined type; vertical-axis wind turbine; stagger angle; radius ratio; simulation
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城市群复合交通网络特性研究
李成兵,魏磊,郝羽成
(内蒙古大学交通学院,内蒙古呼和浩特 010070)
摘要:为使交通基础设施建设更好地服务于城市群社会经济的发展,以复合这样一种全新的视角探索城市群交通网络的性能。对城市群复合交通网络结构进行深入分析,采用站点映射法构建城市群复合交通网络模型;基于复杂网络理论构建城市群复合交通网络的特性指标,并提出指标计算方法;以呼包鄂城市群为例进行实证研究,构建道路交通网络和轨道交通网络叠加形成的复合交通网络采用PajekMatlab仿真计算网络的节点度、节点度分布、平均路径长度、网络聚集系数。通过对比分析道路交通网络和复合交通网络的特性指标,发现轨道交通网络的叠加提高了城市群交通网络的可达性。
关键词:城市群;复合交通网络;复杂网络;网络特性
中图分类号:U491????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2958-08
DOI: 10.16182/j.issn1004731x.joss.201612012
Research on Characteristics of City Agglomeration Compound Traffic Network
Li Chengbing, Wei Lei, Hao Yucheng
(School of Transportation, Inner Mongolia University, Hohhot 010070, China)
Abstract: In order to serve the economic development of city agglomeration, revealing the characteristics of city agglomeration compound traffic network was focused on. The model of city agglomeration compound traffic network was built using the site mapping method based on analysis of the structure of city agglomeration compound traffic network. The characteristics and specific calculation method based on complex network theory were put forward. Compound traffic network of road and rail traffic network was generated through an empirical study of Hu-Bao-E city group, and node degree, node degree distribution, average path length, clustering coefficient of this network be computed by Pajek and Matlab. By comparing the characteristics of road traffic network and compound traffic network, results show that superposition of the rail transit network can improve the accessibility of city agglomeration traffic network.
Keywords: city agglomeration; compound traffic network; complex network; network characteristic
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大型商场智慧购物系统研究
陈立龙1,宋建文2,周伟2,张立国2,潘志庚3
(1. 三明学院海峡动漫学院,福建 三明 365004;2. 中国美术学院互动艺术与技术研究所,浙江 杭州 310024;NhHag8879环亚手机|首页主页
3. 杭州师范大学DMI中心,浙江 杭州 311121)
摘要:大型商场面积大、商品种类繁多,顾客需要花大量时间在寻找商品和排队结账上;而商店在商品的导购和收银等环节中需要投入大量的人力和财力,且效率不高,同时也缺少对每位顾客的消费习惯进行统计的手段。通过将信息化移动技术自动识别技术(射频识别技术)以及网络数据库等技术的结合为商场构建一个以智能购物车为核心技术的智能购物系统使顾客快速付账无需等待提高商场效率和服务质量,对大型超市具有较强的实用价值。
关键词:射频识别技术;智能购物;室内导航;快捷支付;购买习惯
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2966-07
DOI: 10.16182/j.issn1004731x.joss.201612013
Research of Smart Shopping System
Chen Lilong1, Song Jianwen2, Zhou Wei2, Zhang Liguo2, Pan Zhigeng3
(1. Strait Animation Institute of Sanming University, Sanming 365004 China; 2. Institute of Interactive Art and Technology, China Academy of Art, NhHag8879环亚手机|首页主页
Hangzhou 310024, China; 3. DMI Center, Hangzhou Normal University, Hangzhou 311121, China)
Abstract: Hypermarket is quite large in area, and rich in many different kinds of goods, the customer needs to spend a lot of time looking for the products and waiting in check-out queues; And hypermarket not only needs to invest a lot of manpower and financial resources in links such as shopping guide and check-out, and the efficiency is not high, but also lack of statistical means in spending habits of each customer. It has an important significance in the hypermarket to create a smart shopping system by putting mobile information technology, automatic identification technology (RFID technology, for example), the network and database technology together, smart cart was the core element of the system, the system could save customers time, improve the efficiency of the market activities of each link and the quality of services to improve the user experience at the same time, the shop also could earn more profits.
Keywords: RFID; smart shopping; indoor navigation; quick payment; buying habit
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一种求解车辆垂向振动系统H2/H多目标控制的方法
孟建军1,2,3,白欢1,牟健1,银铭1,关旭日1
(1.兰州交通大学 机电工程学院,兰州 730070; 2.兰州交通大学 机电技术研究所,兰州 730070;NhHag8879环亚手机|首页主页
3.甘肃省物流及运输装备信息化工程技术研究中心,兰州 730070)
摘要:针对车辆减振系统中的目标单一的问题,应用H2/H控制算法实现轨道车辆减振系统集减振、节能于一体的多目标优化控制。采用6自由度轨道车辆垂向振动模型为控制对象,以得到较好乘坐舒适性和较少能耗为控制目的,选取作动器控制输出力的H2范数作为能耗指标,以车体浮沉振动位移和加速度、点头振动转角的H范数作为车辆乘坐舒适性指标,设计基于LMIH2/H输出反馈控制器。研究结果表明,该控制器能在保证不过多降低车辆乘坐舒适性的同时,能有效降低作动器能耗,较好地解决了车辆舒适性和作动器能耗之间的矛盾
关键词:轨道车辆;H2/H控制;乘坐舒适性;能耗
中图分类号:U270.1+1????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2973-06
DOI: 10.16182/j.issn1004731x.joss.201612014
Method to Calculate Multi-objective and H2/H Control of Vehicle Vertical Vibration System
Meng Jianjun1,2,3, Bai Huan1, Mou Jian1, Yin Ming1, Guan Xuri1
(1.The Mechatronic Technology Research Institute, Lanzhou Jiaotong University, Lanzhou 730070, China; 2.Mechatronics T&R Institute, Lanzhou Jiaotong University, Lanzhou 730070, China; 3.Engineering Technology Center for Informatization of Logistics & Transport Equipment, Lanzhou 730070, China)
Abstract: Aiming at the disadvantage of single object in railway vehicle damping system,the multi-objective optimal control law of railway vehicle damping system was?devised to balance shock absorption control and energy saving control. To improve the riding comfortability and reduce the energy consumption, the multi-objective H2/H output-feedback controller based on LMI was developed for an active suspension of 6-DOF vertical vibration model of railway vehicle. Norm H2 of the actuator output was taken as the energy consumption indexes, and norm H of the vertical vibration displacement, the acceleration and the nutation angle was taken as the riding comfortability indexes. The?results?show?that the controller can decrease the energy consumption of the actuator effectively and at the same time reduce the riding comfortability to an acceptable level, and make the railway vehicle obtain a good performance of riding comfortability and energy consumption of the actuator.
Keywords: rail vehicle; H2/Hcontrol; riding comfort; energy consumption
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灾变通风中矿井多风井异步反风的仿真实现
李宗翔1,2,路宝生1,2,王天明1,2,王雅迪1,2
(1. 辽宁工程技术大学 安全科学与工程学院,辽宁 阜新 123000;2. 矿山热动力灾害与防治教育部重点实验室,辽宁 阜新 123000)
摘要:为更准确描述矿井反风时期通风系统网域中风流与瓦斯的变动过程,定义了通风机可能出现的停机、单机运行和双机运行等3种工作状态,给出对应状态编码。结合鹤壁矿区八矿实例,运用TF1M3D进行仿真分析,仿真结果与现场实测各特征点的瓦斯浓度相拟合。反风开始,通风机停机,矿井依靠自然风压通风,风量小,出现短时间的瓦斯积聚。通风机反风启动后,工况点发生变动;风流随之变化,工作面瓦斯出现高峰超限现象;随着反风的进行,运移瓦斯的浓度呈阶段性的降低。TF1M3D描述异步反风时矿井系统瓦斯气体组分变化的仿真。
关键词:灾变通风;矿井反风;通风机状态;浓度高峰流;3D网域仿真
中图分类号:TD724,TD725????? 文献标识码:A?? ????文章编号:1004-731X (2016) 12-2979-07
DOI: 10.16182/j.issn1004731x.joss.201612015
Simulation on the Asynchronous Reverse Ventilation in Multi-airshaft Mine
Li Zongxiang1,2, Lu Baosheng1,2, Wang Tianming1,2, Wang Yadi1,2
(1. College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, China; NhHag8879环亚手机|首页主页
2. Key Laboratory of Mine Thermodynamic disasters and Control of Ministry of Education, Fuxin 123000, China)
Abstract: To describe accurately the change process of airflow and gas in mine ventilation system during mine reverse ventilation period, the software TF1M3D was used to research the asynchronous reverse ventilation in multi-airshaft mine. The possible appeared three ventilator working conditions that shutdown, single operation, dual machine operation were defined and the according three codes were given respectively which were used to be the judgment of ventilator working condition. A numerical simulation test was made with the eighth of Hebi Colliery, the simulation results is consistent with the actual testing records of gas density. At the beginning of reverse ventilation, the ventilator stopped working, during a short pause, the mine ventilation relies on natural ventilation pressure, the velocity is low and the volume is small, the gas accumulation appeared in a short time. The airflow changes with the starting of reverse ventilation, TF1M3D gives out the change of ventilator operation point; at the same time, the gas flow changes with it, the peak overrun of gas in working face appears; with the reverse ventilation goes on, the gas concentration declines in stages. The asynchronous reverse ventilation simulation accurately describes the change of gas species in multi-airshaft mine during ventilation stopping period, and improves the calculation accuracy of emergency ventilation simulation.
Keywords: disaster ventilation; mine reverse ventilation; fan working condition; concentration peak flow; 3D ventilation net simulation
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基于预测功率模型的级联整流器均压新方法
盘宏斌,刘林海,肖志勇,欧思程,朱茂琨,许芬
(湘潭大学信息工程学院,湖南 湘潭 411105)
摘要:基于二阶广义积分构造虚拟电压和电流正交分量来建立dq旋转坐标系,以有功和无功占空比为控制对象,结合瞬时功率理论推导出预测功率模型,构造级联H桥整流器主控制系统。然后,针对其直流侧电压不平衡问题,提出了一种新型均压控制策略,即通过电压平衡控制器计算得出耦合效应目标函数取得最小值时有功占空比的修改量,重新构造了各H桥模块有功占空比,调节有功功率分配,从而在保持各H桥模块直流侧电压平衡的基础上,减小了电压平衡控制器与主控制系统之间的耦合效应仿真和实验结果证明了所提方法的正确性和可行性。
关键词:级联H桥;预测功率;电压平衡;二阶广义积分;耦合效应
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2986-08
DOI: 10.16182/j.issn1004731x.joss.201612016
New Voltage Balancing Method for Cascaded Rectifier Based on Predictive Power Model
Pan Hongbin, Liu Linhai, Xiao Zhiyong, Ou Sicheng, Zhu Maokun, Xu Fen
(College of Information Engineering of Xiangtan University, Xiangtan 411105, China)
Abstract: The dq synchronous system was built by constructing virtual orthogonal voltage and current based on second order generalized integrator. The predictive power model was derived to construct main control system of cascaded H-bridge rectifier combining the instantaneous power theory, which took the duty cycle of active and reactive power as control object. Then, a new voltage balancing control strategy was proposed dealing with the problem of DC voltage imbalance in cascaded H-bridge rectifier. The modification of active power was obtained by the voltage balance controller when the objective function of coupling effect achieves minimum and the active power was distributed by reconstructing the duty cycle of active power in each modular, which eliminated the coupling effect between the voltage balance controller and the main control system on the basis of ensuring the DC voltage balance.The correctness and effectiveness of the proposed method was verified by simulation and experimental results.
Keywords: cascaded H-bridge; predictive power; voltage balance; second order generalized integrator; coupling effect
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粒子群与电导增量法结合的光伏发电MPPT
余运俊1, 2刘涛1王时胜1辛建波2聂晓华1
(1.南昌大学,江西 南昌 330031;2. 江西省电力科学研究院,江西 南昌 330096)
摘要:光伏阵列在局部阴影遮蔽时其P-V特性曲线会呈现出多个局部峰值的情况,电导增量法可能跟踪在某个并非最大的极值点上,从而造成跟踪失败。粒子群算法有全局寻优的特点,但跟踪精度有欠缺。提出了一种基于电导增量法优化的粒子群全局MPPT算法,粒子群算法能够快速跟踪到全局最大功率点附近,电导增量法可以进一步精确跟踪到最大功率点。通过将所提方法与传统电导增量法simulink仿真对比以及当局部阴影情况发生突变时的研究,结果证明了该方法能快速准确地跟踪到光伏阵列全局最大功率点。
关键词:光伏阵列;局部阴影;电导增量法;粒子群算法;多峰值最大功率点
中图分类号:TM615????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-2994-07
DOI: 10.16182/j.issn1004731x.joss.201612017
Global optimized Photovoltaic MPPT Algorithm Based on PSO and Incremental Conductance Method
Yu Yunjun1, 2, Liu Tao1, Wang Shisheng1, Xin Jianbo2, Nie Xiaohua1
(1. Nanchang University, Nanchang 330031, China; 2. Jiangxi Electric Power Research Institute, Nanchang 330096, China)
Abstract: The P-V array characteristic curve exhibits a plurality of local maximum power point under conditions of partial shading. The incremental conductance method maybe track an extreme value point that is not the largest power point, thus lead to tracking failure. The PSO algorithm has the characteristics of global optimization, but its tracking precision is deficient. A global MPPT algorithm based on PSO algorithm by incremental conductance method was proposed, PSO algorithm could quickly locate to the approximate global MPP, INC could further precise the MPP. Compared to the traditional incremental conductance method Simulink simulation and the research when partial shade suddenly changed, the result shows that the present method can track the global MPP of the PV array quickly and accurately.
Keywords: PV array; partial shading; INC; PSO algorithm; Multi-peak MPP
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刚体轮式机器人高速避障的生存控制方法
刘磊1,高岩1,吴越鹏2
(1. 上海理工大学管理学院,上海市 2000932. 上海理工大学光电学院,上海市 200093)
摘要:现有的轮式机器人导航控制方法多是将机器人考虑成质点,在实际使用中往往存在局限性。如果将机器人考虑成刚体,要实现高速导航则需要详细的考虑机器人模型,轮廓以及障碍之间的相互关系。因此提出了一种基于生存理论的高速避障方法。对障碍进行线特征抽取,利用所抽取的特征,刚体轮廓,系统状态设计出高维的生存边界;根据生存理论给出符合该生存边界切锥的系统控制量集合。对控制集合优化,获得刚体激进高速的避障控制。生存仿真显示该方法解决了大惯性轮式机器人轮廓与障碍碰撞复杂多样的难题,获得了安全、高速的避障控制效果。
关键词:刚体机器人;高速避障;生存性;微分包含
中图分类号:TP242????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3001-09
DOI: 10.16182/j.issn1004731x.joss.201612018
Viability Control of Rigid Body Wheeled Robots for High Speed Obstacle Avoidance
Liu Lei1, Gao Yan1, Wu Yuepeng2
(1. School of Management, University of Shanghai for Science and Technology, Shanghai 200093, China; NhHag8879环亚手机|首页主页
2. School of Optical-electrical, University of Shanghai for Science and Technology, Shanghai 200093, China)
Abstract:The robot is taken as a point during most existing obstacle avoidance control methods for wheeled robot. These methods have limitations in actual situation. When a robot is considered as a rigid body, in order to get high speed performance, the relationship between robot model, contour and obstacle should be considered in detail. An approach to avoiding obstacle with high speed based on viability theory was proposed for wheeled robots. The line features were extracted from the obstacles, and then high dimension viability boundaries were designed via these features, rigid body contours and states of the robot. According to the viability theory, the viability control set was given to make the system suitable for the tangent cone of these viability boundaries. This control set was optimized for the radical high speed obstacle avoidance control of wheeled robots. The viability simulation shows that, the proposed approach can solve the problem of complex collision scenarios between large inertia robots with the rigid body contours and the obstacles. The effect of the approach is secure and speedy.
Keywords: rigid body robot; high speed obstacle avoidance; viability theory; differential inclusion
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基于苍狼算法的感应电机改进模型参数辨识
吕小意,黄松,王艳,纪志成
(江南大学 物联网技术应用教育部工程研究中心,江苏 无锡 214122)
摘要:为解决感应电机高性能控制中参数估计不准的问题,提出基于苍狼算法的感应电机参数辨识方法。该优化算法是一种新颖的元启发式算法,运用起来简单、灵活,需调节参数少。考虑到两种经典动态数学模型对不同参数辨识精度影响不同,提出了一种改进的感应电机参数辨识模型。相对于经典模型,仿真表明提出的模型使电阻特别是定子电阻的辨识效果得到较大提升,证明改进模型的有效性。在改进的模型下,将该算法与粒子群算法、遗传算法进行电机参数辨识的对比实验。实验结果表明苍狼算法具有较高的辨识精度,证明应用该算法辨识感应电机参数的可行性。
关键词:感应电机;参数辨识;苍狼算法;定子电阻
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3010-09
DOI: 10.16182/j.issn1004731x.joss.201612019
Grey Wolf Optimizer for Parameters Identification of Induction Motor with Improved Model
Lü Xiaoyi, Huang Song, Wang Yan, Ji Zhicheng
(Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Jiangnan University, Wuxi 214122, China)
Abstract: According to the problems of inaccurate parameters estimation of the induction motor in high-performance control, a grey wolf optimizer was used to identify the parameters of the induction motor. Grey wolf optimizer is a new meta-heuristic. Itis simple and flexible to implement, and has fewer parameters to tune. Considering that two typical dynamic mathematical models have different identification precision on different parameters, the improved identification model of the induction motor was proposed. Compared with typical model, simulation results show that the proposed model obviously improves the identification performance of resistances especially stator resistance, verifying the validity of improved model. The algorithm was compared with particle swarm optimization and genetic algorithm for parameters identification of the induction motor with the improved model. Experimental results show that grey wolf optimizer has higher identification precision, demonstrating that parameters identification of the induction motor based on this algorithm is feasible.
Keywords: induction motor; parameter identification; grey wolf optimizer; stator resistance
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基于改进教与学算法的离散制造车间能效优化
徐军辉,王艳
(江南大学物联网技术应用教育部工程研究中心,江苏 无锡 214122)
摘要:针对离散制造车间多目标性、多约束性的特点,以车间总耗能最小为优化目标,构建离散制造车间能效优化模型;针对上述模型提出了一种基于改进教与学算法的离散车间能效优化方法,该改进算法在教阶段引入自适应参数,提高算法的学习效率和适应性,同时在教和学两个阶段加入二次离散过程,在保证算法的收敛性快速和寻优能力强的特点的前提下,使该算法能够应用于离散制造车间优化中。对具体实例进行测试,将基本教与学算法、粒子群算法、鸡群算法与改进教与学算法的结果进行比较,通过分析该改进算法优化的能效明显优于另外两种算法,验证了算法的有效性。
关键词:离散制造车间;能效优化;教与学优化算法;自适应参数;二次离散
中图分类号:TP278????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3019-08
DOI: 10.16182/j.issn1004731x.joss.201612020
Energy Efficiency Optimization for Discrete Manufacturing Workshop Based on Discrete Teaching-learning-based Optimization Algorithm
Xu Junhui, Wang Yan
(Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Jiangnan University, Wuxi 214122, China)
Abstract: Because the discrete manufacturing workshop is multi-objective and multi-constraint, an energy efficiency optimization model whose optimization objective was to minimize the total energy consumption was built for discrete manufacturing workshop. Besides, an improved teaching--learning-based (TLBO) optimization algorithm for discrete energy efficiency workshop optimiz-ation was proposed. This improved algorithm introduced adaptive parameter in training phase to improve the learning efficiency and adaptability of the algorithm. In addition, second discrete process was introduced in the teaching stage and learning stage, respectively. This algorithm could be applied to the optimization of discrete manufacturing workshop under the precondition of ensuring the convergence of the algorithm is fast and strong searching ability of the characteristics. The experimental result was compared with basic teaching-learning-based optimization algorithm (TLBO), particle swarm optimization algorithm (PSO), chicken swarm optimization (CSO). Based on the analysis, optimization of this improved algorithm is superior to the other two algorithms, which indicates that the proposed algorithm is effective.
Keywords: discrete manufacturing workshop; energy efficiency optimization; teaching-learning-based optimization algorithm; adaptive parameter; second discrete process
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条纹管成像激光雷达仿真技术研究
夏文泽,韩绍坤,曹京亚
(北京理工大学光电学院,北京 100081)
摘要:提出了一种条纹管成像激光雷达的仿真模型在仿真模型中激光雷达距离方程发射激光脉冲模型和扫描方程被使用;对系统噪声组成进行了分析。实验结果证明了仿真模型的有效性,并分析了发射激光峰值功率对重构后距离像精度的影响。为条纹管成像激光雷达的设计提供了理论指导和效果预判
关键词:条纹管;距离方程;激光雷达仿真;距离像;成像仿真
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3027-07
DOI: 10.16182/j.issn1004731x.joss.201612021
Simulation Technology Research on Streak Tube Imaging Lidar
Xia Wenze, Han Shaokun, Cao Jingya
(School of Opto-Electronics , Beijing Institute of Technology, Beijing 100081, China)
Abstract: A simulation model on streak tube imaging lidar was introduced. The range equation of lidar, the pulse model of illuminating laser and the scanning equation were used in the model. The system noise was analyzed. The experiment result shows the effectiveness of proposed simulation model. The effect of the pulse laser peak power on distance precision of reconstructed range image was analyzed. This method provided theoretical guidance and desired result inspection for designing of the streak tube imaging lidar.
Keywords: streak tube; range equation; lidar simulation; range image; imaging simulation
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水轮机调速系统的线性自抗扰优化控制
黄宇,王佳荣
(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:针对线性自抗扰控制器参数较多、调节起来较为困难的缺点。提出一种基于下山单纯形法的引力搜索算法,该算法将下山单纯形法的替换机制融入到引力搜索算法粒子的更新中,利用单纯形法具有较强的局部搜索能力,有效克服了引力搜索算法陷入局部最优的缺点。将本文提出的算法应用于水轮机调速系统的线性自抗扰控制器参数优化。仿真结果表明:优化后的线性自抗扰控制器能够很好的抑制超调、减小负调并缩短调节时间,在系统工况发生变化时,仍有良好的控制效果,具有较强的鲁棒性,且能够取得比PID控制更好的抗干扰性能。
关键词:水轮机调速系统;线性自抗扰控制;引力搜索算法;下山单纯形法
中图分类号:TK730????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3033-08
DOI: 10.16182/j.issn1004731x.joss.201612022
Optimized Linear Active Disturbance Rejection Controller Design for Hydraulic Turbine Governing Systems
Huang Yu, Wang Jiarong
(Hebei Engineering Research Center of Simulation & Optimized Control for Power Generation, North China Electric Power University, Baoding 071003, China)
Abstract: The linear active disturbance rejection control is difficult to obtain good control effect as its parameters are not easy to get. A gravitational search algorithm based on Nelder-Mead (NM) simplex search was presented. The replace mechanism of NM simplex search and the particles update method of gravitational search algorithm were combined together in this algorithm. Simplex method has strong local search ability, therefore, the algorithm can overcome the shortcomings of gravitational search algorithm plunging into the local optimal. The proposed algorithm was applied to the parameter optimization of linear active disturbance rejection controller of hydraulic turbine governor system. Simulation results show that: the optimized linear active disturbance rejection control can well suppress overshoot, reduce the negative tone and shorten adjustment time. When system conditions change, control results are still satisfactory. The control performance is much better than PID controller in anti-interference as it has strong robustness.
Keywords: hydraulic turbine regulating system; linear active disturbance rejection control; gravitational search algorithm; NM simplex search
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海洋石油支持船抛锚作业建模与仿真
孙洪波1, 2,施朝健1,林文锦3
(1. 上海海事大学商船学院,上海 2001352. 集美大学航海学院,厦门 3610213. 中海油服,天津 300450)
摘要:为了解海洋石油支持船(Offshore Support Vessel-OSV)抛锚作业过程中,系泊缆和工作缆的缆型、张力变化以及抛锚作业对锚作船的影响,提出了一种OSV抛锚作业的建模方法。采用MMG(Ship Manoeuvring Mathematical Model Group)建模思想建立了六自由度拖船运动数学模型通过水下缆索任一微元段的受力平衡条件导出各微元段的动力学微分方程建立了拖缆模型在此基础上考虑耦合边界条件建立了船---缆系统的运动数学模型, 并采用龙格库塔方法对船舶运动积分求解,采用差分法对拖缆运动进行求解。仿真结果表明该模型可为制定抛锚控制策略提供参考依据,并对OSV模拟器开发提供理论基础。
关键词:海洋石油支持船;系泊缆;工作缆;船舶运动数学模型;有限差分
中图分类号:U661.33?????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3041-07
DOI: 10.16182/j.issn1004731x.joss.201612023
Modeling and Simulation of Offshore Support Vessel Anchoring Operation
Sun Hongbo1, 2, Shi Chaojian1, Lin Wenjin3
(1. Merchant Marine College, Shanghai Maritime University, Shanghai 200135, China; 2. Navigation College, Jimei University, Xiamen 361021, China;
3. China Oilfield Services Limited, Tianjin 300450, China)
Abstract: In order to understand the configurations of mooring line and working wire, tension variation at release point of working wire and the influence of the offshore support vessel during anchoring operation, a mathematical models of OSV anchoring operation was established. According to the MMG (Ship Manoeuvring Mathematical Model Group) ship motion mathematical modeling theory, a 6dof ship motion mathematical model was built. And a 6dof cable motion mathematical model was established with finite difference method. A coupling ship-cable-anchor-cable system model was established.The system motion simulations were carried out, and the results indicate that the model can be used to determine the control strategy of the systems during operation, and provide theory support for offshore oil ship simulator development.
Keywords: offshore support vessel; mooring line; working wire; ship motion mathematical model; finite difference method
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刘清友1,徐涛2
(1. 西南石油大学油气藏地质及开发工程国家重点实验室,成都 610500;2. 四川省特种设备检验研究院,成都 610061)
摘要:油田注水管在安装等作业过程中会形成影响管体应力和强度的各种缺陷。为研究不同缺陷形状对油田注水管强度的影响,选择注水管外表面的半球形、半圆柱形和半圆锥形三类缺陷在单内压、单拉伸载荷和内压-拉伸复合载荷三种载荷工况下对管体应力场分布情况进行分析。仿真结果表明:管体在三类缺陷存在条件下有高应力区和低应力区出现,在缺陷圆弧面与底平面界线处易形成断裂开口,不同管体缺陷的应力场分布由大到小分别为半圆锥形、半圆柱形和半球形该仿真结果有助于了解注水管自身状态和保证注水作业顺利进行。
关键词:采油设备;注水;缺陷形状;注水管;强度
中图分类号:TE984????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3048-06
DOI: 10.16182/j.issn1004731x.joss.201612024
Study on Defect Shape Influence on Strength of Oilfield Water Injection Tubing
Liu Qingyou1, Xu Tao2
(1. State Key Laboratory of Oil and Gas Geology and Exploration, Southwest Petroleum University, Chengdu 610500, ChinaNhHag8879环亚手机|首页主页
2. Sichuan Special Eqiupment Inspection Institute, Chengdu 610500, China)
Abstract: Oilfield water injection tubing can form various defects which affect the strength of tubingbody during the installation and other operations. For studying the influence of different shape defects to stress field of the oilfield water injection tubing, three kinds of defects which are hemispherical, half cylindrical and conical were chosen on the body surface of oilfield water injection tubing, to analyze the stress field distribution of tube body in the three kinds of load conditions that are the single internal pressure, the tensile load and internal pressure-tensile complex load. The simulation result show that: there are high and low stress areas appearing separately in the condition of the tubing body which exist three types of defect, the boundary of bottom flat and circular surface of defects where the fracture opening are easy to form, the stress field distribution from big to small of the tubing body with the defects are the semi-conical, the semi-cylindrical and the hemispherical. Simulation results contribute to understand water injection pipe state and ensure the smooth progress of water injection operation.
Keywords: oil extraction equipment; water injection; defect shape; water injection tubing; strength
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基于系统动力学的锅炉过热蒸汽温度系统建模与仿真
魏乐1,闫媛媛2
(1.华北电力大学控制与计算机工程学院,河北 保定 071003;2.河北华电石家庄热电有限公司,河北 石家庄 050000)
摘要:基于系统动力学建模原理从质量和能量守恒宏观角度,以因果回路图和存量流量图为载体,从系统的运行机理出发,建立了锅炉过热蒸汽温度系统的系统动力学模型。该模型结构层次清晰,繁简适当。以河北清苑热电厂300 MW机组高温过热器为研究对象,在Vensim PLE环境下对所建模型进行了仿真研究。通过仿真曲线与实际生产数据及针对该数据采用粒子群算法辨识得到的传统模型的仿真曲线进行对比分析,验证了所建系统动力学模型的有效性和合理性。
关键词:过热汽温;系统动力学;因果回路图;存量流量图;建模
中图分类号:TM621TP391????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3054-07
DOI: 10.16182/j.issn1004731x.joss.201612025
Modeling and Simulation of Boiler Superheated Steam Temperature System Based on System Dynamics
Wei Le1, Yan Yuanyuan 2
(1. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China;
2. Hebei Huadian Shijiazhuang Thermal Power Co., Ltd, Shijiazhuang 050000, China)
Abstract: Based on the principle of system dynamics, from the perspective of mass and energy conservation, taking the causal loop diagrams and the stock and flow diagrams as the carriers, and starting from the running mechanism of the system, the system dynamics model for the boiler superheated steam temperature system was established. This model has clear structure and reasonable complexity. By using the high temperature super-heater of the 300 MW boiler-turbine unit of Hebei Qingyuan Power Plant as the research object, simulation studies were carried out in Vensim PLE environment. The simulation curves were compared with the curves of the actual production data and the traditional model, whose data was identified by using the particle swarm algorithm. The results of the comparisons verify the effectiveness and rationality of the established model.
Keywords:superheated steam temperature; system dynamics; causal loop diagram; stock-flow diagram; modeling
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多层球壳构件FBP重建差异化滤波设计与仿真
夏惊涛,王群书,马继明,黑东炜,盛亮,魏福利,宋顾周
(强脉冲辐射环境模拟与效应国家重点实验室(西北核技术研究所),陕西 西安 710024)
摘要:针对高密度差多层球壳这一类特殊工件的CT检测技术研究,构建平行束CT投影及图像重建系统模型,开发建立CT研究软件平台,结合理论分析和仿真着重研究基于滤波反投影(FBP)理论重建图像的滤波处理方法。首先通过限定扫描方式使多层球壳截面的CT投影正弦图呈现空间区域性分布,结合图像分析和先验知识对其进行分割,再根据重建细节的频率特征和检测需求,对不同区域投影分别采用RLSL函数进行针对性的滤波处理。仿真结果表明,相对于传统FBP算法中的单一函数滤波,所提出的分区域差异化滤波方法能够获得更好的图像重建效果。
关键词:CT;滤波反投影;图像重建;多层球壳;仿真
中图分类号:TP391.7????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3061-06
DOI: 10.16182/j.issn1004731x.joss.201611026
Design and Simulation of Regional Differently Filtering Method of FBP Algorithm for Multilayer Spherical Shell
Xia Jingtao, Wang Qunshu, Ma Jiming, Hei Dongwei, Sheng Liang, Wei Fuli, Song Guzhou
(State Key Laboratory of Intense PulsedRadiation Simulation and Effect(Northwest Institute of Nuclear Technology), Xi’an 710024, China)
Abstract: Aiming at the CT detection technology research for multilayer spherical shell with great density difference, the parallel beam CT projection and image reconstruction system model were built and a software platform was developed. Combined with theoretical analysis and computer simulation, the filtering method of FBP theory for image reconstruction was focused on. A special scanning mode was limited to make the projection sinogram of multilayer spherical shell show a regional spatial distribution, which was divided up combined with image analysis and priori knowledge. Then, according to the frequency characteristic and reconstruction demand, RL and SL functions were respectively used to filter projection data of different regions. The simulation results show that the proposed method can obtain better image reconstruction results compared with the single function filter in the traditional FBP algorithm.
Keywords: CT; filter back projection; image reconstruction; multilayer sphere; simulation
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双质体三机驱动振动系统同步特性数值模拟
侯勇俊,余乐,方潘,周然
(西南石油大学机电工程学院,成都 610500)
摘要:提出了一种双质体三机驱动自同步振动系统。推导出了双质体振动系统的运动微分方程,并给出了系统的机电耦合数学模型。建立了新的机电耦合仿真模型。最后,运用控制变量法以数值试验的方式研究了中间弹簧刚度、共振、激振力以及电机安装位置对系统自同步性以及同步相位差角的影响。研究结果表明:双质体振动系统在一定条件下能实现稳定的同步运动;中间弹簧刚度、激振力以及电机安装位置对系统的同步特性均有较大的影响;系统处于共振状态时,不能实现同步;上质体两电机水平安装距离的增大,有利于系统同步运动的实现。
关键词:双质体振动系统;机电耦合;控制变量;自同步
中图分类号:TH113;0322????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3066-07
DOI: 10.16182/j.issn1004731x.joss.201612027
Numerical Simulation on Self-synchronization of Double Mass Vibrating System with Tri-exciter
Hou Yongjun, Yu Le, Fang Pan, Zhou Ran
(School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China)
Abstract: A double mass vibrating system of self-synchronization with tri-exciter was put forward. The dynamic differential equation of the double mass vibrating system was established and the electromechanical coupling mathematical model was got. The new electromechanical coupling simulation model was built. By the method of controlling variables, the effects of various factors, such as stiffness of middle spring, resonance, centrifugal force and motor mounting position on self-synchronization of the system and phase difference were studied in a numerical experiment manner. The research results show this system can achieve a stably synchronized motion under certain conditions. The stiffness of intermediate spring, exciting force and installation position of motors have a significant impact on the performance of the system synchronization. System synchronization can’t be obtained when the resonance happens. Increasing horizontal mounting distance of motors of upper body benefits system synchronization.
Keywords: double mass vibrating system; electromechanical coupling; controlling variables; self- synchronization
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单相H6拓扑离网型逆变器无死区控制方法仿真研究
夏鲲1,李菁1,葛越1,沈丽蓉1,王一鸣2,许颇2
(1.上海理工大学,上海 200093;2.宁波锦浪新能源科技有限公司,宁波 315712)
摘要:提出了一种基于H6拓扑的无死区控制方法,通过检测输出电压、电感电流的大小和方向,在输出电压与电感电流同向时调制桥臂开关管,反向时调制续流开关管,而在电压、电流过零点附近仍然加入死区,以确保直流母线不会短路,由控制模块计算后进而调整开关管的开关状态,消除绝大多数死区时间的加入。在MATLAB/Simulink环境下构建了基于H6拓扑的单相离网型逆变器电压电流双闭环无死区控制方法仿真模型。仿真结果表明,与传统有死区控制相比,无死区控制方法能够显着提高直流母线电压利用率,降低输出电压总谐波畸变率(THD)。
关键词:H6拓扑;无死区控制;直流母线电压利用率;总谐波畸变率
中图分类号:TM464????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3073-08
DOI: 10.16182/j.issn1004731x.joss.201612028
Research of Non-dead-time Control Method on Single-phase Off-grid Inverter Based on H6 Topology
Xia Kun1, Li Jing1, Ge Yue1, Shen Lirong1, Wang Yiming2, Xu Po2
(1.University of Shanghai for Science and Technology, Shanghai, 200093, China; 2. Ginlong Technologies Co. Ltd, Ningbo, 315712, China)
Abstract: A novel non-dead-time control strategy based on H6 topology was proposed. Through detecting the value and direction of the output voltage and current of inductor, the power switches of bridge arm were modulated if they were in the same direction, and the freewheeling switches were modulated if they were opposite. In order to protect the DC bus voltage from shorting out, the dead time should be added during the zero-crossing of voltage and current. And the states of switches were adjusted by calculation of the control module. Then most dead time could be eliminated. The simulation model for the single-phase off-grid inverter based on H6 topology was constructed in MATLAB/Simulink circumstance, in which the non-dead-time control with voltage and current double closed loop was applied. Simulation results show that, compared with dead-time control, the new control method can significantly improve the utilization of DC bus voltage and reduce Total Harmonic Distortion (THD) of output voltage.
Keywords: H6 topology; non-dead-time control; the utilization rate of DC bus voltage; THD
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交流电场下变压器油中气泡动力学特性仿真
赵涛1,刘云鹏1,律方成1,刘山2
(1. 华北电力大学电力工程系,河北 保定 071003;2. 国网保定供电公司,河北 保定 071000)
摘要:对交流电压下变压器油中柱板电极间气泡动力学特性进行了数值仿真研究。建立了交流电压下变压器油中气泡运动二维数值模型,通过麦克斯韦应力张量在气泡界面上的面积分求得气泡受到的电动力,通过气泡受力分析获得交流电场中不同位置释放后气泡的运动轨迹。计算结果显示在工频交流电场作用下,气泡在柱板电极间场强集中区域存在振荡平衡位置,不同大小的气泡对应的振动平衡位置比较接近,且处于柱板电极间场强集中区域。这意味着气泡有可能在该位置出现聚集,导致油间隙击穿电压的降低。
关键词:气泡轨迹;聚集;变压器油;电动力
中图分类号:TM854????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3081-07
DOI: 10.16182/j.issn1004731x.joss.201612029
Bubble Dynamics Simulation in Transformer Oil under AC Electric Field
Zhao Tao1, Liu Yunpeng1, Lü Fangcheng1, Liu Shan2
(1. School of Electrical engineering, North China Electric Power University, Baoding 071003, China; NhHag8879环亚手机|首页主页
2. State Grid Baoding Electric Power Supply Company, Baoding 071000, China)
Abstract: The dynamics of gas bubbles in transformer oil was theoretically explored. A numerical model was introduced for the bubble dynamics in the transformer oil under AC electric field. The electrodynamic force was calculated by integrating the Maxwell stress tensor on the surface of the bubble, and then the bubble trajectory was obtained through the force calculation of the bubble under the AC electric field. Notably, trajectories calculated indicate the bubble aggregation in concentrated area of the electric field between the needle-plane electrode, and different bubble radius will affect the trajectory of the bubble. Also, different bubble radiuses cause a small change in the equilibrium position of bubble between the electrodes. It is concluded that the bubble can play a catalytic role in the breakdown of the oil gap.
Keywords: bubble trajectory; aggregation; transformer oil; electrodynamics force
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基于改进主成分分析法的离散制造能耗分析
陈彦,王艳
(江南大学物联网技术应用教育部工程研究中心,江苏 无锡214122)
摘要:针对离散制造能耗构成的复杂性,能耗指标之间相互影响,能耗分析结果难以获取的问题,从产品能耗、设备能效、任务流程能效三个层面,建立离散系统能效评价指标体系,进而提出一种基于改进主成分分析法的离散制造能耗分析方法,该方法引入指标重要性权重,优化了传统主成分分析只强调信息权重的缺陷,实现了指标客观性和主观性的有机结合,并在数据无量纲化处理时采用改进的数据标准化方法,避免了原始数据的信息丢失,全面考虑离散能耗分析的各个因素。实例分析和仿真结果表明改进方法更具合理性和稳定性。
关键词:离散制造;能耗;评价指标体系;改进主成分分析
中图分类号:TP278????? 文献标识码:A?????? 文章编号:1004-731X (2016) 12-3087-08
DOI: 10.16182/j.issn1004731x.joss.201612030
Energy Consumption Analysis of Discrete Manufacturing Based on Improved Principal Component Analysis Method
Chen Yan, Wang Yan
(Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Jiangnan University, Wuxi 214122, China)
Abstract: Due to the complexity of energy consumption of the discrete manufacturing system and the interaction between energy consumption indexes, the result of energy consumption analysis is hard to obtain, establishing energy efficiency evaluation index of discrete system, based on the three levels of energy consumption of products, equipment energy efficiency, the energy efficiency of task process. Furthermore, a method was proposed to analyze the discrete manufacturing process energy consumption based on improved principal component analysis method. The method introduced importance weights, overcame the shortcoming of traditional component analysis, which only emphasized the information weights, combined the subjective and objective of indexes which integrate, adopted the improved normalization during the data nondimensionalization to avoid the loss of original data information and considered every factors of energy consumption analysis of discrete manufacturing. Case analysis and simulation show that the improved method is more reasonable and stable.
Keywords: discrete manufacturing; energy consumption; evaluation index system; improved principal component analysis
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