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2016年第7期

时间:2016-06-30 14:06:48??来源:??作者:

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李楠,韦灼彬,何学军,张世云
(海军工程大学勤务学院, 天津 300450)
摘要:高架索作为海上横向补给装备中重要的组成部分,其性能指标直接影响海上补给作业的安全。针对目前国内尚没有合适的高架索动力学模型,将高架索作为多柔体系统,建立其多柔体动力学模型,并在此模型的基础上,建立高架索优化设计模型,同时用ADAMS(Automatic Dynamic Analysis of Mechanical Systems)将此优化设计模型进行参数化,建立海上补给高架索参数化设计平台。通过一个海上横向干货补给系统高架索优化设计,结果表明模型和优化设计平台是可以满足设计需要的。
关键词:水路交通;海上横向补给;高架索;多体系统动力学;刚柔混合体系统;ADAMS;优化设计;仿真;参数化设计平台
中图分类号:TP302.1????? ??文献标识码:A??? ???文章编号:1004-731X (2016) 07-1481-08
Research on Highline Cable Parametric Design Platform of Alongside Replenishment at Sea
Li Nan, Wei Zhuobin, He Xuejun, Zhang Shiyun
(Duty School, Naval Engineering University, Tianjin 300450, China)
Abstract:High cable is an important part of the horizontal replenishment equipment at Sea. Its performance directly affects the safety of replenishment at sea. Because there is not a suitable high cable dynamic model in the domestic, for the first time to take the high cable as a multi-body system and established the flexible-body dynamics model. Then the optimization design model of high cable which is on the basis of the model was established. Meanwhile it set up the parametric design platform of high cable by using ADAMS to parameterize the optimization design model. The optimization design results of a horizontal dry goods replenishment system at sea show that the flexible-body dynamics model and optimization design platform of high cable can meet the needs.
Keywords: waterway transportation; alongside replenishment at sea; highline cable; multibody system dynamics; rigid-flexible-body system; ADAMS; optimization design; simulation; parametric design platform
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基于比例策略的多目标PSO的感应电机参数辨识
黄松1田娜1王艳1纪志成1,2
(1.江南大学物联网工程学院, 无锡 2141222.轻工过程先进控制教育部重点实验室, 无锡 214122)
摘要:建立了感应电机多参数多目标辨识模型,提出了一种基于Pareto最优集和比例策略个体最优项的多目标粒子群算法对感应电机参数进行辨识。Pareto最优集不需要考虑各个目标的加权系数,避免了感应电机辨识目标系数选择的主观性,比例策略能更好地平衡从个体最优和全局最优学习经验的能力。通过在Matlab/Simulink中进行验证,结果证明该算法能提高感应电机参数的辨识精度,具有更好的性能。
关键词:粒子群算法;个体最优项;感应电机;参数辨识;Pareto最优集
中图分类号:TP18TM85????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1489-08
Study of IM Parameter Identification Using Multi-objective Particle Swarm Optimization with Proportional Guided Strategy
Huang Song1, Tian Na1, Wang Yan1, Ji Zhicheng1,2
(1. School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China;
2. Key Laboratory of Advanced Process Control for Light Industry, Ministry of Education, Wuxi 214122, China)
Abstract: A multi-parameter and multi-objective identification model of induction motor was established, and a multi-objective particle swarm optimization based on Pareto set and all personal-best positions guided strategy was proposed and applied to the identification model. Not considerring the weighted coefficient of each objective, Pareto set is able to avoid subjective choice of the coefficients of multi-objective identification and proportion strategy with all personal-best positions guided could balance the learning ability from personal-best positions and global-best position. Having verified the performance on Matlab/Simulink, the results show that the proposed algorithm is able to improve parameter identification accuracy, and has a better performance.
Keywords: particle swarm optimization; personal-best; induction motor; parameter identification; Pareto set
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分布式作战体系能力动态演化涌现建模
杨迎辉1,李建华1,南明莉1,2,陈强3,温己方4
(1. 空军工程大学信息与导航学院, 西安 710077; 2. 95881部队,北京 100095; 3. 94285部队, 诸城 261200; 4. 94789部队, 南京 210018)
摘要:针对战场环境的动态性、作战体系的层次性、作战单元的异质性及交互作用的非线性,提出一种分布式作战体系能力演化涌现建模方法。基于超网络理论,构建由单元层、网系层组成的分布式作战体系超网络模型,分析了层级网络间的关系;定义单元能力、网系能力、体系能力、交战程序链等概念,研究了单元能力映射关系和能力能力关联关系、作战单元自作用、作战单元相互作用、作战网系促进作用、战场环境等因素对单元能力的影响,建立单元能力演化模型和体系能力涌现模型。以空中突击作战为例进行仿真分析,结果验证了方法与模型的可行性和有效性。
关键词:作战体系;能力;演化;涌现;超网络;交战程序链
中图分类号:E917; N945????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1497-09
Dynamic Evolvement and Emergence Modeling for Distributed Operational Systems Capability
Yang Yinghui1, Li Jianhua1, Nan Mingli1,2, Chen Qiang3, Wen Jifang4
(1. Information and Navigation College, Air Force Engineering University, Xi’an 710077, China; 2. The Unit 95881 of PLA, Beijing 100095, China; Yzcag8879环亚手机|首页主页
3. The Unit 94285 of PLA, Zhucheng 261200, China; 4. The Unit 94789 of PLA, Nanjing 210018, China)
Abstract: Aiming at dynamic characteristic of battlefield environment, particularity of operational systems, function heterogeneity and nonlinear effect of operational units, a new dynamic evolvement and emergence modeling method for distributed operational systems capability was proposed. Operational systems super-network model composing of unit layer and network & system layer was built based on super-network theory, and relationship between two layers was analyzed. Concepts of unit capability, network & system capability, systematic capability and fire procedure link were defined. Unit to capability mapping relationship and capability to capability relationship were researched respectively. Affects of unit self-effect, units’ inter-effect, network promotion and battlefield environment on unit capability were studied, and unit capability evolvement model and systematic capability emergence model were built accordingly. Taking aviation assault operations as an example, simulation results validate feasibility and validity of the method and model.
Keywords: operational systems; capability; evolvement; emergence; super-network; fire procedure link
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社区结构对微博舆论话题传播的影响研究
朱恒民1,胡炜1,马静2,魏静1
(1. 南京邮电大学管理学院,南京 210023;2. 南京航空航天大学经济与管理学院,南京 210016)
摘要:微博聚集了大量的用户群体,社区结构是微博网络的重要特征。为了探索微博网络的社区结构对舆论话题传播的影响规律,分析了微博用户选择关注对象的心理,基于此提出了微博社区网络的构造模型,该模型可以通过社区因子调节微博网络的社区结构特征。实验中验证了社区因子对微博网络社区结构的影响,基于SIR模型仿真分析了传播源节点和社区因子对微博舆论话题传播的影响机理。仿真结果表明,与名人效应相比,网络的社区结构对微博话题的传播具有一定的抑制作用。通过twitter实例数据对部分结论进行了验证。
关键词:微博;话题传播;社区结构;网络建模
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1506-09
Study on Influence of Community Structure on Opinion Topic Propagation of Micro-blog
Zhu Hengmin1, Hu Wei1, Ma Jing2, Wei Jing1
(1. College of Management, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;Yzcag8879环亚手机|首页主页
2. College of Economics&Management, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
Abstract: Micro-blog gathers a large number of users, and community structure is a typical feature of Micro-blog network. In order to explore the influence of community structure on the opinion topic propagation of Micro-blog, users' psychology was analyzed for selecting their followees, and a model for constructing Micro-blog network was proposed which could modify community structure of network with a community factor. Experiments testify the effect of the community factor on micro-blog network structure, and use a SIR model to analyze the influence of different topic source nodes and community factors on the topic propagation of simulated networks. The result shows that community structure has a negative effect on the topic propagation compared with the effect of celebrities in the Micro-blog. An example data from twitter testifies some conclusions.
Keywords:micro-blog; topic propagation; community structure; network modeling
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两层无标度网络谣言传播模型仿真研究
覃志华1,2,刘咏梅1
(1.中南大学商学院,湖南 长沙 410083;2.湖南师范大学研究生院,湖南 长沙 410081)
摘要:人际关系网络是谣言人际传播的载体,将媒体从人际关系网络中分离出来,利用可变聚类系数无标度网络和SIQR传播模型建立了谣言的两层传播模型,并制定了谣言在两层模型上的传播规则及相应算法。在仿真实验中,利用多Agent仿真平台Netlogo4.0.2分析了新模型中与媒体层相关的3个参数谣言激发数、媒体谣言传播率以及节点覆盖度的变化对人际关系网络中谣言传播的影响,发现提高媒体对谣言的敏感度、规范媒体职业操守、扩大媒体的传播范围有利于抑制人际关系网络中谣言的传播。
关键词:谣言传播;无标度网络;人际关系网络;媒体
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1514-06
Simulation Investigation of Rumor Spreading Model Base on Two-layer Scale-free Networks
Qin Zhihua1,2, Liu Yongmei1
(1. Business School of Central South University, Changsha 410083, China; Yzcag8879环亚手机|首页主页
2. Graduate School of Hunan Normal University, Changsha 410081, China)
Abstract: Relationship network is a carrier of rumor spreading. Separating the media from the relationship network, a two-tier rumor spreading model was proposed based on tunable clustering scale-free network and SIQR spreading model. Meanwhile the rumor spreading rules of the new model were developed. In simulation experiments, the influence associated with the three parameters of the media layer was analyzed byusing the Mult-Agent system Netlogo4.0.2. It is found that improving the sensitivity of the media, regulating media ethics and expanding the scope of the media can curb the spread of rumors.
Keywords: rumor spreading; scale-free network; social network; media
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基于观测器的柔性两杆空间机械臂鲁棒控制
于潇雁,陈力
(福州大学机械工程及自动化学院,福建 福州 350116)
摘要:讨论了载体位置、姿态均不受控情况下漂浮基柔性两杆空间机械臂基于线性观测器的关节运动鲁棒控制及柔性振动最优控制。选择合理的联体坐标系,利用拉格朗日方程并结合动量守恒原理得到漂浮基柔性两杆空间机械臂系统的动力学方程。通过合理选择联体坐标系与利用奇异摄动理论,得到柔性两杆空间机械臂的慢变子系统与柔性臂快变子系统。针对两个子系统设计相应的控制规律,即基于线性观测器的鲁棒慢变子系统控制律与基于线性观测器的柔性臂快变子系统最优控制律,系统的数值仿真证实了方法的有效性。
关键词:柔性两杆空间机械臂;奇异摄动法;鲁棒控制;线性观测器;柔性振动最优控制
中图分类号:V448????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1520-08
Robust Control of Free-floating Two-flexible-link Space Manipulator Based on Observer
Yu Xiaoyan, Chen Li
(School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China)
Abstract: The joint motion robust control and optimal flexible vibration control of a free-floating two-flexible-link space manipulator based on linear observers was discussed. The dynamic model of a free-floating space manipulator with two flexible links was established by the momentum conservation and the Lagrange equations. Based on singular perturbation approach and choosing appropriate local coordinate frame, a slow subsystem and a flexible-link fast subsystem were obtained. The corresponding controllers were proposed for the two subsystems, which was the linear observer based robust slow subsystem controller and the linear observer based flexible link fast subsystem optimal controller.Numerical simulation demonstrates the proposed control algorithm’s efficiency.
Keywords: two-flexible-link space manipulator; singular perturbation approach; robust control; linear observer; optimal flexible vibration control
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复杂系统建模仿真语言编译器的实现与应用
周文1,迟鹏2,李伯虎2,宋晓1
(1.北京航空航天大学,北京 100191;2.北京仿真中心,北京 100854)
摘要:仿真语言是实现一体化仿真设计环境的关键技术之一。仿真语言实现的难点是实现其编译器,即自动识别仿真语言语义并将其转换为C++等编程语言。介绍了复杂系统仿真语言(CMSL)的构成及其特性,研究了编译器的结构、工作机理,实现了一个面向CMSL文本的编译器。重点针对离散事件仿真的多层复合模型,提出并实现了一种内嵌于编译器的扁平化方法。利用一个离散系统案例对CMSL的描述能力及编译器的编译功能进行验证,结果表明,CMSL语言具有面向对象和面向组件的特性,其编译器能够编译基于CMSL的仿真文本,并将复合模型扁平化。
关键词:编译器;仿真语言;词法;语法;扁平化
中图分类号:TP391.1????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1528-11
Implementation and Application of Complex System Modeling and Simulation Language Compiler
Zhou Wen1, Chi Peng2, Li Bohu2, Song Xiao1
(1. Beihang University, Beijing 100191, China; 2. Beijing Simulation Center, Beijing 100854, China)
Abstract: Simulation language is a key technology of integrated simulation based design software environment. A difficulty of developing simulation language is the compiler that automatically transfers simulation language Semantics to programming language such as C++. The contents and features of CMSL were introduced. And a compiler which could analyze simulation text written in CMSL was implemented. A decouple method for Discrete System was proposed and integrated in the compiler. The features object-oriented and components oriented of CMSL were verified by an example with its ability to describe discrete system.
Keywords: compiler; simulation language; lexical; grammar; decouple
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操作机主运动机构液压控制系统力顺应性研究
李阁强1,张静伟1,李跃松1,周斌2,马淑叶2
(1.河南科技大学机电工程学院,洛阳 471003;2.安阳锻压机械工业有限公司,安阳 455000)
摘要:提出重载锻造操作机配合压机锻压时,主运动机构液压控制系统的力顺应性方法。以操作机的主运动机构为对象,建立其逆运动学和动力学模型;以压力为被控量,利用联合仿真技术,搭建提升液压控制系统模型;基于水平缓冲原理,推导出水平缓冲液压系统的模型。以锻件锻压过程中的变形为输入,通过仿真分析得到提升缸和缓冲缸的位移和力的变化规律,通过经典PID控制方法仿真分析验证了提升系统主动压力顺应性,以及缓冲系统被动顺应的有效性。
关键词:主运动机构;提升系统;水平缓冲系统;力顺应性
中图分类号:TP24 ??????文献标识码:A?????? 文章编号:1004-731X (2016) 07-1538-09
Research on Force Compliance of the Hydraulic Control System in Major-Motion Mechanism for Manipulator
Li Geqiang1, Zhang Jingwei1, Li Yuesong1, Zhou Bin2, Ma Shuye2
(1. Department of Mechanical and Electrical Engineering, Henan University of Science and Technology, Luoyang 471003, China;Yzcag8879环亚手机|首页主页
2. Anyang Forging-Press Machinery Industry Corporation, Anyang 455000, China)
Abstract: The force compliance method of the hydraulic control system in major-motion mechanism was proposed during the forging process. Taking the major-motion mechanism of the forging manipulator as the target, the inverse kinematics model of major-motion mechanism was established, and the dynamic model of hydraulic control system was built. Through taking the pressure as the controlled variable, the model of the lifting hydraulic control system was obtained by using the co-simulation technology. Based on the principle of the horizontal buffering system, the model of the buffering hydraulic system which was made up of the buffering cylinder and the accumulator was deduced.variations of the displacements and forces for the lifting cylinder and the buffering cylinder were obtained by simulation. The effectiveness of active pressure compliance of the lifting control system through using the classical PID control strategy and that of passive compliance of the buffering system were verified. The deformation of workpiece under the forging process was taken as an input, the
Keywords: major-motion mechanism; lifting system; horizontal buffering system; force compliance
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磁致伸缩惯性冲击电机建模与仿真
赵冉1,2,卢全国1
(1.南昌工程学院江西省精密驱动与控制重点实验室,南昌 330099;2.河北工业大学电气工程学院,天津 220000
摘要:将磁致伸缩式惯性冲击电机的动力学模型与基于Jiles-Atherton模型的磁致伸缩材料非线性本构模型相结合建立磁致伸缩惯性冲击电机的步长及速度预测模型。利用MATLAB / Simulink软件搭建仿真系统,通过仿真可得到惯性冲击电机的位移及速度。搭建实验系统对模型进行验证。仿真与实验结果表明,在驱动电流0.4~4A、驱动频率10~80 Hz的工作区间内,模型预测值与电机实际输出之间的误差不超过15%,能够对磁致伸缩惯性冲击电机的运动性能进行准确预测。
关键词:惯性冲击电机;磁致伸缩材料;非线性模型;动力学模型
中图分类号:TM381????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1547-06
Modeling and Simulation of Magnetostrictive Impact Drive Mechanism
Zhao Ran1,2, Lu Quanguo1
(1. Jiangxi Province Key Laboratory of Precision Drive And Control, Nanchang Institute of Technology, Nanchang 330099, ChinaYzcag8879环亚手机|首页主页
2. Department of Power Electrical, Hebei University of Technology, Tianjin 220000, China)
Abstract: A model of magnetostrictive impact drive mechanism (IDM) was built to predict the step size and velocity, in which the dynamical model and the second order non-linear model of magnetostrictive material based on Jiles-Atherton model were considered. The simulation model was developed by utilizing MATLAB /Simulink software, and the data of IDM’s displacement and velocity was obtained based on the model. The experimental system was built to testify the given model. The results illustrate that the error between experiment and simulation results are less than 15% within the range of driving current 0.2~0.4A and working frequency 10~100Hz. The proposed model can be used to predict the motion performance of magnetostrictive impact drive mechanism.
Keywords: impact drive mechanism; magnetostrictive materials; non-linear model; dynamic model
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子母弹抛撒流场仿真和气动效应研究
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:为研究子母弹抛撒过程中的复杂空气动力学问题,和建立非线性气动特性的的工程分析方法,采用计算流体力学方法对子母弹抛撒过程进行数值仿真,详细讨论了出舱条件、气动干扰和非定常效应等对分离运动的影响,并结合蒙特卡洛方法开展统计研究。研究表明,子弹的分离运动以径向远离和姿态俯仰为主;出舱条件决定了质心运动和姿态运动的方向,但姿态运动易受各类气动效应干扰,其中以母弹激波干扰的影响最大;根据典型工况的数值仿真结果建立了干扰修正模型,能较好修正各类气动效应;由蒙特卡洛方法获得的统计结果与理论分析结论一致。
关键词:计算流体力学子母弹抛撒;多体干扰;非定常流动
中图分类号:V211.3????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1552-09
Numerical Simulation and Aerodynamic Effect Research for Multi-warhead Projection
Yuan Wu
(Supercomputting Center, Computer Network Information Center, Chinese Academy of Sciences, Beijing 100190, China)
Abstract: In order to study the complex aerodynamic problem in multi-warhead projection, and also establish the practical analysis method for nonlinear aerodynamic characteristics, the separation process was simulated by using CFD technology as well as Monte Carlo method for a statistical research, while effects of the projection condition, multi-body intervene and unsteady characteristic during the separation process were discussed. The present research shows that the main forms of the submunition movement are radial separation and pitching movement; the direction of mass center motion and attitude motion is determined by the projection condition, however the attitude motion is also sensitive to aerodynamic effects especially the shock effects from the dispenser;the interference correction model has been established according to the numerical results of typical conditions and this model is proved to be in a good performance; the statistical results obtained by the Monte Carlo method are consistent with the theoretical analysis conclusions.
Keywords: CFD; multi-warhead projection; multi-body interference; unsteady flow
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交叉环单向循环搬运系统调度问题的仿真优化研究
李军涛1,夏琨1,木濑洋2
(1.上海海洋大学工程学院,上海 201306;2. 京都工艺纤维大学,日本 京都 601-8585)
摘要交叉环单向循环搬运系统是柔性制造系统或物流系统的典型基本环节,在半导体晶圆制造自动化搬运系统中有着广泛的运用,其搬运效率的叠加往往决定着整个系统的效率。不同的调度规则影响着小车间的堵塞状况,进而影响了整个柔性制造系统的搬运效率。为了减少堵塞并提高系统效率,构建了交叉环单向循环搬运系统的数学模型并对系统进行仿真分析,比较了不同调度规则的优劣性,得出较优的调度规则。仿真显示:在工件处理时间相同时,顺序调度规则优于随机调度规则在工件处理时间不同时,最短处理时间与顺序调度规则相结合能减少更多的堵塞且提高效率,实现系统优化
关键词:物料搬运系统;调度;交叉环;优化
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1561-07
Scheduling Problem of Unidirectional Material Handling System with Short-cut
Li Juntao1,XiaKun 1, Kise Hiroshi2
(1. College of Engineering Science and Technology, Shanghai Ocean University Shanghai, Shanghai 201306, China;Yzcag8879环亚手机|首页主页
2.
Kyoto Institute of Technology, Kyoto, 601-8585, Japan)
Abstract: Unidirectional circulation-type material handling system on a single loop with a shortcut is a typical and basic unit in a flexible manufacturing system or logistics system. It is widely used in semiconductor wafer fabrication system. Superposition efficiency of the basic unit often determines the one of the whole system. Different scheduling rules impact the interference between AGVs and then have an important effect on the efficiency of the whole system. To decrease the interference and improve performance of the system, a mathematical model of this system was made, analyzing this system by simulation and comparing the merits and demerits under the different scheduling rules. Simulation results show that the Order rule is better than the Random rule under the condition of same processing time. Under the condition of different processing time, the SPT-Order rule not only makes congestion (interference time) decrease but also achieves the optimal performance.
Keywords: material handling system; scheduling; short-cut; optimization
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对置活塞发动机缸内流动的模型分析与仿真验证
马富康1,2,赵长禄1,赵振峰1,王豪1,于霞3,曹艳3,张吉庆4
(1. 北京理工大学机械与车辆学院,北京 100081;2. 中北大学 机械与动力工程学院,太原 030051;Yzcag8879环亚手机|首页主页
3. 山西柴油机工业有限责任公司,大同 037036;4. 中国国际工程咨询公司,北京 100042)
摘要:为分析对置活塞二冲程发动机缸内流动的组织方法与影响规律,分别设计均匀和非均匀进气腔以及平顶和凹坑活塞进行缸内流动计算。通过建立缸内流动的零维模型,对缸内流动的组织和影响规律进行定性分析。同时,通过三维计算流体动力学仿真验证了零维模型的分析结论。研究表明,均匀进气可组织较强的缸内涡流,非均匀进气配合活塞顶面的凹坑导流结构,可实现缸内流动的合理组织和平均湍动能变化,相比平顶活塞缸内湍动能提高了1.5倍。
关键词:对置活塞二冲程;流动;零维模型;仿真
中图分类号:TK412???? ??文献标识码:A????? ?文章编号:1004-731X (2016) 07-1567-08
In-cylinder Flow Analysis and Verification of Opposed-piston Two-stroke Engine
Ma Fukang1,2, Zhao Changlu1, Zhao Zhenfeng1, Wang Hao1, Yu Xia3, Cao Yan3, Zhang Jiqing4
(1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China; 2. School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China; 3. Shanxi Diesel Engine Industry co., LTD, Datong 037036, China; Yzcag8879环亚手机|首页主页
4. China International Engineering Consulting Corporation, Beijing 100042, China)
Abstract: The effects of flat piston uniform scavenging chamber, flat piston non-uniform scavenging chamber and pit piston non-uniform scavenging chamber on the in-cylinder flow were analyzed. Uniflow scavenging zero-dimensional model was used to qualitative analysis in-cylinder flow organizational process and influence rule for opposed-piston two-stroke engine. Results show that uniform scavenging chamber can organize swirl and increase scavenging efficiency and non-uniform scavenging chamber can organize tumble and increase turbulent kinetic energy. Scheme 3 is favorable to organize tumble and maintain the in-cylinder turbulence intensity, which is increased by 150 percent.
Keywords: opposed-piston two-stroke; flow; zero-dimensional model; simulation
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用于黑启动暂态分析的DFIG空载并网仿真
刘力卿1,米增强1,杜平2,万玉良2,袁贺1
(1. 新能源电力系统国家重点实验室(华北电力大学),河北 保定 071003Yzcag8879环亚手机|首页主页
2. 国网内蒙古东部电力有限公司调度控制中心,呼和浩特 010020)
摘要:建立用于孤网黑启动电磁暂态分析的双馈风电机组(Doubly-Fed Induction Generator based Wind Turbine, DFIG)空载并网模型,对于含风电孤网黑启动策略的研究与验证具有重要作用。为此,提出一种基于Simulink平台的DFIG空载并网仿真方法。通过对双馈发电机在空载和并网发电两种工况下的运行特性进行分析,建立了其双工况仿真模型;根据DFIG的空载并网运行原理,将所建双馈发电机模型与风力机、变频器等软件内置模块相连接,并通过建立其空载并网控制模型,建立了DFIG空载并网的整体仿真模型。仿真结果表明所提仿真方法是可行的。
关键词:孤网黑启动;电磁暂态;双馈风电机组;空载并网;双工况仿真模型
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1575-10
DFIG Grid Connection Simulation Method Used for Transient Analysis of Black-start
Liu Liqing1, Mi Zengqiang1, Du Ping2, Wan Yuliang2, Yuan He1
(1. State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, Baoding 071003, China;Yzcag8879环亚手机|首页主页
2. Power Dispatching Control Center, State Grid East Inner Mongolia Electric Power Company Limited, Hohhot 010020, China)
Abstract: Establishing a grid connection model of doubly-fed induction generator based wind turbine (DFIG) could be useful in the research and verification of black-start strategy in isolated power grid containing wind power. A DFIG grid connection simulation method based on Simulink was proposed. Through analyzing the operation characteristics of doubly-fed induction generator in no-load and grid-connected conditions, its dual-operation simulation model was established. According to the grid-connection theory of DFIG, the established doubly-fed induction generator model was combined with wind turbine, converter and other built-in modules, and the DFIG grid connection model was built with its control system added. Simulation results show that the simulation method is feasible.
Keywords: isolated power grid black-start; electromagnetic transient; DFIG; grid connection; dual-operation simulation model
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压裂车作业过程耦合振动仿真分析
王川1,谢真强1,王国荣1,张仕民2侯雯3,黎俊1,周旭1,楚飞1
(1.西南石油大学机电工程学院,成都 610500;2.中国石油大学(北京)机械与储运工程学院,北京 102249
3.国家油气钻井装备工程技术研究中心,宝鸡 721002
摘要:为了研究压裂车作业过程中车台发动机和压裂泵双振源作用对车体影响,运用集中参数法和状态空间法建立了平衡悬架、轮胎、车台发动机和压裂泵与车架的多体耦合动力学模型,并采用MATLAB/Simulink2 500型压裂车作业过程中的转速、刚度、阻尼等参数进行了耦合振动仿真分析。结果表明,垂向振动强度比俯仰振动最大值相差2个数量级;0~10 Hz频率的振动对功率影响最明显;前、中悬挂的阻尼变化和后悬挂刚度变化主要影响振动幅值,而前、中悬挂的刚度变化和后悬挂的阻尼变化主要影响峰值对应的振动频率。
关键词:压裂车;振动;集中参数法;状态空间法;阻尼
中图分类号:TE934????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1586-07
Simulation and analysis on coupled vibration of fracturing truck process
Wang Chuan1, Xie Zhenqiang1, Wang Guorong1, Zhang Shimin2, Hou Wen3, Li Jun1, Zhou Xu1, Chu Fei1
(1. College of Mechanical and Electrical Engineering Southwest Petroleum University, Chengdu 610500, China;Yzcag8879环亚手机|首页主页
2. College of Mechanical and Transportation Engineering China Petroleum University (Beijing), Beijing 102249, China;Yzcag8879环亚手机|首页主页
3. National Engineering Technology Research Center of Oil and Gas Drilling Equipment, Baoji 721002, China)
Abstract: In order to study the effect of vibration of engine and fracturing pump on truck body during fracturing operation, lumped parameter method and state space methodwere used to build multi-body dynamics coupling model between the balanced suspension, tires, engine, fracturing pump and the frame. Based on this model, the MATLAB/Simulink software was applied to simulate the characteristic of rotational speed, stiffness and damping of the 2 500 fracturing truck during fracturing operation.The results show that the maximum intensity of vertical vibration is stronger hundreds times than pitch motion. Vibration frequency range of 0~10 Hz affects vibration most evidently; the variation of stiffness of rear suspension and the damping of the front and central suspension have a great influence on amplitude, while the variation of damping of rear suspension and the stiffness of the front and central suspension have a great influence on frequency of peak.
Keywords: fracturing truck; vibration; lumped parameter method; state space method; damping
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Research on Reactor Modeling Simulation Based on Neutron Equivalence Homogeneous Theory
Ma Jin, Liu Zhibin, Wang Bingshu, Duan Xinhui
(Department of Automation North China Electric Power University, Beijing 102206, China)
Abstract: A mathematical nuclear CANada Deuterium Uranium (CANDU) reactor steady and transient modelling simulation is built to get the axial thermal power distribution. With a relatively small number of nodes (100-500 nodes) to present the core, based upon two energy group Neutron Diffusion Formulation and a typical spatial discretization, according to equivalence theory and homogeneous method, this is accomplished by properly defining the nuclear properties (absorption and fission cross sections, diffusion coefficient, etc.) characterizing each of the nodes finished. The 390 channels thermal power distribution is calculated under Linux language environment. The thermal power difference is within 5% error with IAEA database. The proposed modeling simulation can solve the large error and big redundant in comparison with the Flux-Volume-Weighted (FVW) method and Finite Difference Method (FDM), there is an important meaning for nuclear reactor fuel management research and optimization.
Keywords: canada deuterium uranium (CANDU); equivalence theory; homogeneous parameters; nuclear reactor power; modelling
基于中子等效均匀扩散理论的反应堆建模仿真研究
马进,刘志宾,王兵树,段新会
(华北电力大学自动化系,北京 102206
摘要:建立了稳态的和动态的CANDU核反应堆轴向功率分布模型通过研究中子扩散和输运方程:以有限的粗网节点为模型,基于两群中子扩散方程和空间离散化,一般等效均匀化方法;通过定义核反应堆参数(吸收和裂变截面,扩散系数等)建立了CANDU核反应堆热功率分布模型。仿真得到390个燃料通道的轴向热功率。搭建以LINUX环境,通过与实际运行数据比对进行验证,其与实际反应堆数据误差在5%以内。所建模型及仿真结果解决了传统体积权重方法和有限差分方法的计算误差偏大、计算过程冗长及参数计算不准确等问题,对于核反应堆燃耗管理软件的研究和优化有重要的参考价值。
关键词:CANDU堆;等效理论;均匀化参数;核反应堆; 建模仿真
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1593-08
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基于采煤机可靠性的智能牵引调速系统研究
刘旭南,赵丽娟,盖东民,杜章雨,郝良英
(辽宁工程技术大学 机械工程学院,辽宁 阜新 123000)
摘要:在井下,采煤机牵引速度直接影响到采煤机的效率及可靠性。以MG70*2/325-BWD型采煤机为研究对象,从采煤机可靠性出发,采用Simulink建立了基于采煤机关键零件可靠性的智能调速系统,解决了牵引电机负载转矩模块、经过神经网络拟合的最优牵引速度生成模块等模块的构建及仿真问题,仿真结果表明:该系统可实现牵引速度对推荐最优牵引速度的快速、精准跟踪;当煤岩坚固性系数为2.85、截割深度为0.58 m时,牵引电机转速最大为1 142.06 r/min,牵引速度可达到4.85 m/min;由于牵引电机裕度较大,可通过提高薄弱环节可靠性来进一步提升采煤机生产效率,使采煤机整体性能达最优。
关键词:采煤机;可靠性;Simulink;智能牵引
中图分类号:TD421.63????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1601-08
Research on Intelligent Hauling Speed Regulation System Based on Shearer’s Reliability
Liu Xunan, Zhao Lijua, Gai Dongmin, Du Zhangyu, Hao Liangying
(College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China)
Abstract: Under the mine, Shearer’s hauling speed affected the shearer’s efficiency and reliability. Taking MG32570*2/325-BWD shearer as research object, from shearer’s reliability, by using Simulink, the intelligent speed regulation system was established, based on shearer key parts’ reliability. The building & simulation of hauling motor load torque block and recommended optimum hauling speed generation block which was fitted by neural network was solved. The simulation results show that: this system can achieve the recommended speed, which is traced by hauling speed rapidly and accurately. When consistent coefficient and cutting depth are 2.85 and 0.58m, the hauling motor’s maximum speed is 1142.06r/min, hauling speed can reach 4.85m/min. Because the hauling motor’s tolerance is big enough, the shearer’s productivity can increase by improving the weak parts’ reliability, which can let the shearer get the optimal performance.
Keywords: shearer; reliability; simulink; intelligent hauling
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高等级飞行模拟机视景客观测试方法研究
刘长发,李慧涌
(北京蓝天航空科技有限责任公司,北京 100085
摘要:随着我国商用飞机的发展,对高等级飞行模拟机的需求将越来越大,除研制生产外,对模拟的测试鉴定,也是保证模拟机质量的关键环节。视景系统是飞行模拟机的主体部分之一,为满足民航总局对飞行模拟机的鉴定要求,根据飞行模拟设备主鉴定测试指南,开展视景客观测试,深入分析传输延迟、视场角、系统几何、表面对比度、亮度、表面分辨率、光点大小、光点对比度和可视地面区段共9个客观测试项的鉴定测试要求、测试原理和测试方法,指出测试案例和测试的流程,对视景系统的性能评估具有重要意义,也对业内其他飞行模拟机的鉴定有借鉴作用。
关键词:高等级飞行模拟器;视景系统;主鉴定测试指南;客观测试项
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1609-06
Research on Visual Objective Test Method of High-Level Flight Simulator
Liu Zhangfa, Li Huiyong
(Beijing Bluesky Aviation Technology Co., Ltd, Beijing 100085, China)
Abstract: With the development of commercial aircraft, the demand of high-level flight simulator will increase. In addition to development and production, qualification test is a key link to ensuring the quality of simulator. Visual system plays an important role of flight simulator. In order to meet the requirement of qualification from CAAC, visual objective test based on main qualification test guide of flight simulator was developed. It is very significant that test requirements, test theory and test methods of visual objective test item were researched deeply, including transport delay, field of view, system geometry, surface contrast, brightness, surface resolution, light point size, light point contrast and visual ground segment, which have reference value of testing other flight simulator.
Keywords: high-level flight simulator; visual system; main qualification test guide; objective test item
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面向渐进传输的图像多功能水印算法
金剑秋1,曹帮琴2,王勋1,吴海燕1,杨柏林1
(1.浙江工商大学计算机与信息工程学院,浙江 杭州 310018;2.信阳职业技术学院,河南 信阳 464000)
摘要:多功能水印同时实现了用于版权保护的鲁棒水印和用于内容认证的半脆弱水印。它分为多段水印嵌入与单段水印嵌入,后者在不可见性上优于前者,但技术上更具挑战性。提出了一种面向图像渐进传输的单段水印嵌入的多功能水印算法,它将图像的特征子图作为水印信息,依据宿主图像局部区域的纹理强度和高亮强度,动态调整水印嵌入的强度,将水印嵌入至DCT (Discrete Cosine Transform) 变换域的中低频系数,从而能在图像渐进传输的过程中快速判断版权归属和定位恶意篡改,具备自验证特性。实验表明:我们的方法在实现了版权保护的同时,也实现了篡改定位。
关键词:多功能水印;渐进传输;JPEG;人类视觉系统
中图分类号:TP309.7????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1615-08
Multipurpose Image Watermarking Algorithm for Progressive Transmission
Jin Jianqiu1, Cao Bangqing2, Wang Xun1, Wu Haiyan1, Yang Bailing1
(1. School of Computer Information and Engineer, Zhejiang Gongshang University, Hangzhou 310018, ChinaYzcag8879环亚手机|首页主页
2. Xinyang Vocational & Technical College, Xinyang 464000, China)
Abstract: Multipurpose watermarking, which has the property of both robust and semi-fragile watermarking, can realize two or more purposes in one algorithm, e.g. copyright protection and content authentication usually. It can be classified into multi-segment and single-segment watermark embedding. The latter is better in invisibility, but more challenging than the former. A multi-purpose image watermarking algorithm with single-segment watermark embedding for progressive transmission was proposed. It embedded a watermark abstracted from original image into middle and low-frequency coefficients of block DCT transform. In the watermark embedding process, the intensity of watermark could be dynamically adjusted according to the local texture and highlight intensity of the host image. In this way, the algorithm could fast perform copyright protection and locate spiteful tamper. The intensive experimental results show that our algorithm meets our expectation that copyright protection and locating spiteful tamper can be carried out at the same time.
Keywords: multipurpose watermarking; progressive transmission; JPEG; human visual system (HVS)
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基于特征值合并的语音增强算法
陆慧娟1,刘亚卿1,刘砚秋1,关伟2
(1.中国计量学院信息工程学院,浙江 杭州310018;2.中国计量学院现代科技学院,浙江 杭州 310018)
摘要:为进一步抑制噪声,提出一种基于特征值合并的语音增强算法。在经典的内嵌式预白化子空间方法的基础上,用特征值合并来提高语音质量。研究发现,对含噪语音的协方差矩阵进行特征值分解后,大特征值分量主要包含语音信息,而小特征值分量主要包含噪声,特征值分量按特征值从小到大排序后,剔除相邻的小特征值分量,可有效抑制噪声,提高语音质量。相比于其它方法,基于特征值合并的语音增强算法能有效工作于各种噪声环境中,显着提高信噪比,并有更好的语音可懂度。
关键词:语音增强;子空间方法;特征值分解;语音质量
中图分类号:TN912.3????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1622-06
Eigen-value Combination Approach for Speech Enhancement
Lu Huijuan1, Liu Yaqing1, Liu Yanqiu1, Guan Wei2
(1. College of Information Engineering, China Jiliang University, Hangzhou 310018, China;Yzcag8879环亚手机|首页主页
2. College of Moder Science and Technology, China Jiliang University, Hangzhou 310018, China)
Abstract: In order to further suppress noise, a kind of speech enhancement algorithm based on Eigen-value merge was proposed. Eigen-values combination was used to improve the speech quality on the basis of the classic embedded pre-whitening subspace methods. The study shows that, after decomposing the covariance matrix of speech signals with noise, the larger Eigen-value component mainly includes speech information, and the smaller Eigen-value component mainly contains noise. Sorted by Eigen-values from small to big, the adjacent large Eigen-value component replaces with small Eigen-value component, which can effectively suppress noise and improve the quality of speech. Compared with other speech enhancement algorithm, this algorithm based on Eigen value merger can work effectively in a variety of noisy environment, significantly improves the SNR, and has better speech intelligibility.
Keywords: speech enhancement; subspace method; eigen-value decomposing; speech quality
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TNPC型逆变器无死区载波层叠PWM控制
李文娟,冯杰,王超
(哈尔滨理工大学电气与电子工程学院,黑龙江 哈尔滨 150080)
摘要:载波层叠PWM(Carrier Disposition Pulse Width Modulation)调制法在实际应用中加入死区后会引起电流波形畸变及电压利用率降低等问题,以TNPC(T-type Neutral Point Clamped)型三相三电平逆变器拓扑结构作为研究对象,提出一种应用于三电平逆变器的无死区载波层叠PWM调制法。该调制法采用三重载波生成三路PWM调制信号,通过分析不同工作状态时死区引起的效应,推导出功率开关管的导通和关断规律。在MATLAB/Simulink环境下进行仿真,结果表明该方法可降低电流中的谐波含量、提高电流的基波幅值和电压利用率,实现TNPC型三电平逆变器无死区控制。
关键词:TNPC型逆变器;三电平;载波层叠PWM;无死区
中图分类号:TM46????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1628-09
Carrier Disposition PWM Control with No Dead Zone for TNPC Inverter
Li Wenjuan, Feng Jie, Wang Chao
(School of Electric and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China)
Abstract: After the addition of dead zone, the carrier disposition PWM modulation method could have some problems, such as distortion of current waveform and decreasing of voltage utilization ratio. Taking the TNPC type three-level inverter as a researching object, a novel method of the carrier disposition PWM modulation with no dead zone for three-level inverter was proposed, in which three PWM modulation signals were generated by using triple carrier wave. By analyzing the effect caused by the dead zone in different operating states, on and off rules of power switches were derived. Simulation results in MATLAB/Simulink environment show that the proposed method can reduce harmonic content of the current, and increase the amplitude of the fundamental current and the voltage utilization ratio, which realizes no-dead-zone control of the TNPC type three-level inverter.
Keywords: TNPC inverter; three-level; carrier disposition PWM; no dead zone
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一种状态与杂波相关条件下的GM-CPHD算法
马丽丽,秦晓姗,陈金广
(西安工程大学 计算机科学学院,陕西 西安 710048)
摘要:对许多传感器而言,所观测到的杂波更容易集中在目标所处区域。此时,杂波不再是均匀分布,杂波的分布与真实目标所处状态相关,这与传统滤波算法中的假设不同。在此条件下,传统多目标跟踪算法的跟踪精度和实时性会受到很大影响。针对该问题,提出一种状态与杂波相关条件下的GM-CPHD滤波算法。对状态与杂波之间的相关性进行建模;根据整个监视区域的杂波分布重新计算杂波强度,并将其应用于滤波更新过程中;为降低时间复杂度,采用自适应椭球门限在算法更新步骤之前对量测集合进行预处理,使用落入门限内的量测集合进行更新步骤的运算。仿真结果表明,在状态与杂波相关条件下,本文算法较传统算法具有更好的滤波精度以及更低的时间复杂度。
关键词:状态相关杂波;概率假设密度滤波;目标跟踪;杂波强度;自适应椭球门限
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1637-07
GM-CPHD Filter with State-dependent Clutter
Ma Lili, Qin Xiaoshan, Chen Jinguang
(School of Computer Science, Xi’an Polytechnic University, Xi’an 710048, China)
Abstract: For many sensors the clutters observed are easier to concentrate in the area around targets, namely the state-dependent clutter, which is different from the known clutter distribution in traditional filtering algorithms. So, the accuracy the real-time performance and of traditional multi-target tracking will be greatly degraded. To solve this problem, a kind of GM-CPHD filter with state-dependent clutter was proposed. The relationship between clutter and state was modeled. The clutter intensity was recalculated according to the distribution of clutter in the whole surveillance area and applied to update process; at the same time, in order to reduce the time complexity, an adaptive gating strategy was adopted to make a pretreatment, that is, only the measurements which fell into a threshold were used in update process. The simulation results show, in the environment of state-dependent clutter, the proposed algorithm has better filtering accuracy and lower time complexity.
Keywords: state-dependent clutter; probability hypothesis density filter; target tracking; clutter intensity; adaptive ellipsoid gating
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基于Bladed风电机组变速与变桨距控制器参数优化
高峰,王伟,凌新梅
(华北电力大学控制与计算机工程学院,北京 102206)
摘要:由于风力发电系统具有非线性和参数时变等特点,其控制器参数在设计和优化时不易计算与整定。利用Bladed软件中模型线性化结合模型降阶算法建立了适用于参数整定的机组线性化模型,应用免疫记忆粒子群算法整定控制器PI(Proportion Integral)参数,并基于Bladed参数辨识结果计算了最优转速-转矩控制的增益系数和自适应PI变桨距控制的增益因子,形成了一种基于Bladed的风电机组变速与变桨距控制器参数优化方法。仿真结果表明了该优化方法的正确性和有效性。
关键词:风电机组;Bladed;控制器;优化;免疫记忆粒子群算法
中图分类号:TM614????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1644-08
Parameters Optimization for Variable Speed and Pitch Controller of Wind Turbine Based on Bladed
Gao Feng, Wang Wei, Ling Xinmei
(School of Control and Computer Engineering, North China Electric Power University, Changping District, Beijing 102206, China)
Abstract: Due to nonlinearity and time-varying parameters of wind power system, its controller parameters are hard to be calculated and tuned during the process of design and optimization. The linear model which is suitable for parameters tuning was built through model linearization of Bladed and model reducing-order algorithm. The PI parameter was tuned with the IM-PSO (Immune Memory Particle Swarm Optimization). Moreover, the gain coefficient of optimal torque control and the gain divisor of adaptive PI pitch control conducted optimizing calculation based on the identification parameters of Bladed. A set of optimization method for variable speed and pitch controller of wind turbine was established. The simulation results show the validity and advantages of the proposed methods.
Keywords: wind turbine; Bladed; controller; optimization; immune memory particle swarm optimization
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支持向量机参数优化的土地集约利用评价与分析
陈莉1,李姣姣1,肖曙露2
(1. 安徽建筑大学管理学院,安徽 合肥 230601;2. 安徽省施工图审查有限公司,安徽 合肥 230022)
摘要:对国内外土地集约利用评价的相关文献研究,在支持向量机、蚁群算法基础上,提出相关系数、蚁群算法与支持向量机相结合评价方法,对指标进行相关分析,确定指标集,运用蚁群算法,优化支持向量机参数,得出较好的惩罚因子C,核函数σ和不敏感系数ε,再对支持向量机训练,该方法提高了训练准确度,对土地集约利用进行cACO-SVM评价,并与ACO-SVMGA-SVM的土地集约利用评价进行比较,评价与仿真结果表明,cACO-SVM的土地集约利用评价优于ACO-SVMGA-SVM两种方法,cACO-SVM的土地集约利用评价效果比较理想。
关键词:土地集约利用;相关系数;蚁群算法;支持向量机;评价
中图分类号:F292????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1651-09
Evaluation and Analysis of Land Intensive Utilization Based on Parameters Optimization of SVM
Chen Li1, Li Jiaojiao1, Xiao Shulu2
(1. School of Management, Anhui Jianzhu University, Hefei 230601, China;Yzcag8879环亚手机|首页主页
2. Anhui construction drawing review Co., Ltd, Hefei 230022, China)
Abstract: Based on relevant literature research of evaluation on intensive land-use both at home and abroad, the theory of Support Vector Machine (SVM) and Ant Colony Algorithm (ACO) was discussed. A new method of Correlation Coefficient, the Ant Colony Algorithm and Support Vector Machine (cACO-SVM) was proposed, which analyzed the relevant indicators to determine index set, using ACO, optimization of SVM parameters to draw a good penalty factor C and kernel function sigma and epsilon insensitive coefficient and training SVM, the method improved the training accuracy. Optimization of the land intensive utilization evaluation based on cACO-SVM was put forward, comparing with the ACO-SVM and GA - SVM intensive land use evaluation. Evaluation and simulation results show that analysis of cACO-SVM intensive land use evaluation is better than that of the ACO - SVM and GA - two methods of SVM. Intensive land use evaluation effect of cACO - SVM is more ideal.
Keywords: intensive land use; correlation coefficient; ACO; SVM; evaluation
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基于α阶神经网络逆系统孵化过程解耦控制
周国雄,李俊超,陈爱斌
摘要:针对家禽孵化过程是一个复杂的生物过程,温度、湿度和氧气浓度之间耦合严重,常规的控制方法难以保证3个参数之间的稳定,提出一种基于α阶神经网络逆系统家禽孵化过程解耦控制方法。将3个参数进行耦合度分析分组,采用α阶神经网络逆系统控制耦合度较强的2个参数,另一个则通过模糊控制器控制,从而保证3个参数的稳定。实验结果表明了该方法的有效性。
关键词:孵化过程;逆系统;模糊控制;耦合度
中图分类号:TP299????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1661-07
Decoupling Control of Poultry Hatching Process Based on α-order Neural Network Inverse System
Zhou Guoxiong, Li Junchao, Chen Aibin
(School of Computer and Information Engineering, Central South University of Forestry & Technology, Changsha 410004, China)
Abstract: The poultry hatching process is a complex biological process, in which coupling between temperature, humidity and oxygen concentration is serious, and conventional control methods can not guarantee the stability of three parameters. An α-order inverse system decoupling control method for poultry hatching process was proposed. The three factors were grouped by coupling degree analysis, using α-order neural network inverse system to control the two parameters whose coupling degree is stronger, another parameter would be controlled by fuzzy controller, thus ensuring the stability of the three parameters. The experimental results show the effectiveness of this method.
Keywords: incubation process; inverse system; fuzzy control; coupling degree
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基于Bayes方法的机床主轴加速寿命试验可靠性研究
迟玉伦,李郝林
(上海理工大学机械工程学院, 上海 200093)
摘要:随着高精度机床发展,对机床主轴可靠性要求越来越高。利用加速寿命试验对机床主轴可靠性寿命评估正在成为研究热点,如何提高其评估精度是一个非常重要的问题。根据机床主轴的可靠性寿命服从Weibull分布特性,利用贝叶斯(Bayes)方法对机床主轴进行加速寿命可靠性研究,由于加速寿命试验载荷环境与实际工作载荷环境存在一定差异,提出了在Bayes理论中引入环境差异因子的方法对机床主轴可靠性分析计算,获得更高的可靠性寿命评估精度。通过Monte-Carlo方法仿真与实验研究,验证了该方法对机床主轴可靠性评估的准确性和有效性,为提高主轴可靠性寿命提供了理论基础和解决办法。
关键词:机床主轴;Bayes;环境差异因子;可靠性
中图分类号:TH123????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1667-06
Study Machine Tool Spindle Performance Reliability Based on Bayes Method
Chi Yulun, Li Haolin
(Mechanical Engineering College, University of Shanghai for Science and Technology, Shanghai 200093, China)
Abstract: With the development of high precision machine tool, the reliability requirement is higher and higher for machine tool spindle. Reliability evaluation of spindle based on accelerated life testing is becoming a hot spot of research, and how to improve the precision of evaluation is one of the most important issues. According to the Weibulldistribution characteristic of machine tool spindle reliability, the spindle accelerated life reliability was studied by using the Bayes method. Due to the environment difference between the accelerated test load and the actual working load. The Bayes theory which used the environment difference factor, was introduced to calculate spindle reliability and to get higher accuracy assessment. The method effectiveness was proved by the Monte-Carlo simulation and experiment research, and it provides theoretical basis and solution for the spindle reliability assessment.
Keywords: machine tool spindle; Bayes; environmental difference factor; reliability
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开关用BJT的特性研究和PSPICE仿真
李孜,张渊博
(上海理工大学,上海 200093)
摘要:Marx脉冲功率发生器中,开关是最重要的组件,其特性直接影响输出脉冲上升沿。提出一种利用BJT(Bipolar Junction Transistor)集电极与发射极间的雪崩击穿特性的新型开关器件代替传统开关的方法,可实现Marx输出上升沿小于5ns的脉冲电压,可代替传统Marx发生器中的气体开关。介绍不同型号的BJT集电极与发射极间雪崩击穿特性,根据实验结果,以适合小型Marx发生器的BJT开关特性为主要依据选用合适的BJT。目前没有雪崩击穿的仿真元件,只能用PSPICE建立BJT的集电极与发射极间击穿仿真模型代替实际BJT的雪崩击穿,并以此来辅助Marx脉冲发生器的设计
关键词:BJT;雪崩击穿;PSPICE仿真;Marx发生器
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1673-07
Switching characteristics of BJT and PSPICE Simulation
Li Zi, Zhang Yuanbo
(University of Shanghai for Science and Technology, Shanghai 200093, China)
Abstract: In Marx type pulsed power devices, the switch is the most important component to determinethe rising time of output pulses. A novel switching device utilizing the avalanche breakdown characteristic between the collector and emitter of BJT,was proposed to replace the traditional switch. Impules voltage could be outputted in less than 5ns by Marx circuit using BJT which could be the alternative switch of general Marx generator. Different BJTs’ avalanche breakdown characteristics between the collector and emitter were introduced, according to experimental results, some appropriate BJTs were chosen to be used in Marx generator. At present there is no simulation of the avalanche breakdown, and a simulation model about the avalanche breakdown between the collector and emitter of BJT is built utilizing PSPICE and is applied to assist the designing of Marx generator.
Keywords: Bipolar Junction Transistor; avalanche breakdown; PSPICE simulation; Marx generator
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基于ANSYSXX型圆管相贯节点静力性能研究
潘颖1,秦林肖1,2
(1. 上海工程技术大学机械工程学院,上海 201620;2. 上海海隆石油管材研究所,上海 200949)
摘要:采用ANSYS软件对平面XX型圆管相贯节点的极限承载力进行了非线性有限元分析,揭示了相贯节点塑性区的应力分布情况,确定了节点的主要破坏模式,并重点探讨了一些基本几何参数对节点承载力的影响。研究结果表明,支主管外径之比b、主支管轴线夹角q、主管径厚比γ是影响平面XX型圆管相贯节点极限承载力的主要因素;平面XX型圆管相贯节点的破坏模式大多属于节点塑性破坏;平面XX型圆管相贯节点的极限承载力计算公式,可在K型节点承载力设计公式的基础上乘以一个修正参数。
关键词:平面XX型相贯节点;极限承载力;有限元分析;几何参数
中图分类号:TU392.3????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1679-06
Research on Static Behavior of XX-Joints Based on ANSYS
Pan Ying1, Qin Linxiao1,2
(1. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;Yzcag8879环亚手机|首页主页
2. Shanghai Hilong Petroleum Tubular Goods Research Institute, Shanghai 200949, China)
Abstract:Nonlinear finite element analysis was used in the ultimate bearing capacity on planar XX-joints by ANSYS software. The stress distributions of the joints were demonstrated, the main failure modes of the joints were determined, and the influences of some fundamental geometric parameters on the ultimate strength were the research points. The results show β (diameter ratio of the branch to the chord),q(axial angle of the chord and the branch), γ (the ratio of the diameter of the chord to the thickness of the walls of the chord) are the main factors of the bearing capacity on planar XX-joints; the failure modes mostly belong to plastic failure of the walls of the chord; the computational formula of the bearing capacity on planar XX-joints is multiplied by a correction parameter based on the design formula of the bearing capacity on K-joints.
Keywords: planar XX-joints; the ultimate bearing capacity; finite element analysis; geometric parameters
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基于蒙特卡罗法的一维弹道修正弹落点精度分析
雷晓云,张志安
(南京理工大学智能弹药国防重点实验室,江苏 南京 210094)
摘要:一维弹道修正弹出炮口后会因各种扰动因素影响形成落点散布利用蒙特卡洛法研究影响射击精度的因素。根据实际试验数据,确定了3个主要扰动因素:阻尼片张开延时误差、阻力系数误差和目标测距误差。针对扰动因素,利用randn函数在Matlab软件平台下,进行弹道仿真研究;基于确定的各因素误差分布,得到各个因素对落点影响的概率分布以及落点密集度,确定了各项误差的最大、最小允许范围,仿真研究表明,在最小误差源条件下可以保证落点精度要求,为提高修正精度提供依据。
关键词:弹道修正弹;蒙特卡洛法;误差分析;落点精度
中图分类号:TJ013.2??????文献标识码:A??? ???文章编号:1004-731X (2016) 07-1685-08
Research of Impact Point Accuracy of One-dimensional Trajectory Correction Projectile Based on Monte Carlo
Lei Xiaoyun, Zhang Zhian
(ZNDY of Ministerial Key Laboratory, NUST, Nanjing 210094, China)
Abstract: After the one-dimensional trajectory correction projectile out of the muzzle, various disturbance factors caused the impact point dispersion. Monte Carlo method was utilized on the shooting accuracy analysis. Based on the practical test datasets, three major factors were determined, namely, time delay of opening-damper mechanism, error of drag coefficient and measurement error of target. As to the disturbances, function randn was used for the analysis of the three major factors on the flat of Matlab. According to error distribution of the factors, the probability distribution and dispersion of the impact point were obtained. The maximum and minimum ranges of allowable errors were determined. Simulation results show that, the minimum range of the errors can meet the requirement of the shooting accuracy, which provides some basis for further improvement of correction accuracy.
Keywords: one-dimensional trajectory correction projectile; Monte Carlo study; error analysis; impact point accuracy
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基于马尔可夫链的自动化立体仓库的绩效评估
马向国1,刘同娟2,王丽3,蒋荣芬3
(1. 北京物资学院物流学院,北京 101149;2. 北京物资学院信息学院,北京 101149;3. 北京物资学院研究生部,北京 101149)
摘要:科学可行的评估方法是改善自动化立体仓库应用现状的必要前提。已有的基于自动化立体仓库的绩效评估方法以静态的、定性的分析方法为主,其结论与实际情况存在一定的偏差。采用动态的、定量的评估方法对自动化立体仓库的绩效进行分析,从而为提高自动化立体仓库的使用效率提供分析依据。确定了自动化立体仓库的绩效评估的指标变量,并将马尔可夫分析法应用到自动化立体仓库的绩效评价系统中,建立了数学求解模型,并通过ARENA仿真技术,验证了该模型的可行性与科学性
关键词:自动化立体仓库;绩效评估;马尔科夫分析法;ARENA仿真
中图分类号:TP391.9????? 文献标识码:A?????? 文章编号:1004-731X (2016) 07-1692-09
Performance Evaluation of Automated Warehouse Based on Markov Chain
Ma Xiangguo1, Liu Tongjuan2, Wang Li3, Jiang Rongfen3
(1. Logistics School, Beijing Wuzi University, Beijing 101149, China; 2. School of Information, Beijing Wuzi University, Beijing 101149, China; Yzcag8879环亚手机|首页主页
3. Graduate School, Beijing Wuzi University, Beijing 101149, China)
Abstract: It is necessary that the way of evaluating the AS/RS is scientific and feasible. However the majority of existing evaluate methods is static and qualitative, whose analysis results deviation, to a certain extent, from the real data. To support the improvement of the AS/RS use, the performance of AS/RS with a dynamic and quantitative method was analyzed. Specifically, the automated stereoscopic warehouse performance evaluation indicators were established; by using Marco analysis, the mathematical model of performance evaluation was got; based on ARENA software, the feasibility and validity of the mathematical solution model were verified.
Keywords: AS/RS; performance evaluation; markov analysis; ARENA simulation
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基于PSOESNs的马铃薯贮藏库温度预测控制
刘俊霞1,2,熊新荣1,胡兵1
(1.新疆工程学院电气与信息工程系,乌鲁木齐 830023;2.新疆大学信息科学与工程学院,乌鲁木齐 830046)
摘要:针对马铃薯存储现状及其加工企业原材料和人力资源的严重浪费问题,结合新疆大罗素农业科技开发有限公司马铃薯储藏库温度数据的非线性、时变性等特点,采用常规控制方法控制效果不理想。提出了新的温度预测控制方法,它是用粒子群优化算法滚动优化输入控制量并得到实际输出值,ESNs对储藏库内温度进行预测,利用预测输出和实际输出的偏差来对系统反馈较正。仿真结果表明:提出的温度预测控制方法是有效的,不仅在控制效果上优于LS-SVM预测控制,还有良好自适应性以及对扰动信号有较好的鲁棒性。
关键词:粒子群优化算法;回声状态网络;温度预测控制;马铃薯储藏库
中图分类号:TP391.9????? 文献标识码:A??? ???文章编号:1004-731X (2016) 07-1701-05
Potato Storage Temperature Prediction Control Based on PSO and ESNs
Liu Junxia1,2, Xiong Xinrong1, Hu Bing1
(1. Department of Electrical and Information, Xinjiang Institute of Engineering, Urumqi 830023, China; Yzcag8879环亚手机|首页主页
2. School of Information Science and Engineering, Xinjiang University, Urumqi 830046 China)
Abstract: According to the current situation of potato storage and serious waste of raw materials and human resources of potato processing enterprises, combined with temperature data characteristics of potato storage from Xinjiang Great Russell Agricultural Science and Technology Development LTD., and control effect of the conventional control methods which is not ideal, a new temperature predictive control method was proposed, which rolled to optimize the input control variable by using particle swarm optimization algorithm and get the actual output values, use ESNs to forecast the temperature in the storage, the system was corrected by deviation between forecasting output and actual output. The simulation results show that the proposed temperature control method is effective, not only the control effect is better than that of the LS-SVM predictive control, but also has good adaptability and robustness to disturbance signals.
Keywords: PSO; ESNs; temperature predictive control; potato storage
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