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The design of load frequency variable structure controller for power systems

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The design of load frequency variable structure controller f...

第2.届中国控制与决策会议

作者： Mi Yang 1 , Pan Da 1 , Wu Xiao 1 , Jing yuanwei 2.1. The School of electric power and Automation {2., shanghai University of electric power, shanghai 2.00902. School of Information Science and {2., Northeastern University, Shenyang 110004

In this paper, a variable structure load frequency controller is proposed for a system with parameter uncertainties and load disturbance, the switching surface is designed by pole placement method, the controller is derived from the reaching law, which can assure the hitting condition is satisfied. A simulation study for a numerical example is given to illustrate the effectiveness of this control design.

关键词： Load frequency control Variable structure control reaching law

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电动连续式爬缆机器人设计理论分析与试验

上海交通大学学报 2003年第1期37卷 58-61页

作者：张家梁吕恬生宋立博王钧功东华大学机械工程学院上海200051 上海交通大学机械与动力工程学院上海200030

在分析缆索曲线约束和爬升阻力等工作环境的基础上 ,提出一种采用铰链结构的电动连续式爬缆机器人结构模型 ,建立了其弹簧压紧力、车轮抱紧力等力学模型 ,并对样机研制实例进行了验算 .研制的爬缆机器人具有液压控制的弹簧压紧装置 ,能... 详细信息

在分析缆索曲线约束和爬升阻力等工作环境的基础上 ,提出一种采用铰链结构的电动连续式爬缆机器人结构模型 ,建立了其弹簧压紧力、车轮抱紧力等力学模型 ,并对样机研制实例进行了验算 .研制的爬缆机器人具有液压控制的弹簧压紧装置 ,能在缆索上快速安装和安全收回 .在实验室多次试验后 ,该机器人已在南浦大桥进行了现场试验 .结果表明其能高效。

关键词：爬缆机器人电动连续式铰链结构斜度阻力自动爬升弹簧压紧力车轮抱紧力

Thermal-mechanical analysis of metal forming based on meshfree method

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Thermal-mechanical analysis of metal forming based on meshfr...

第五届国际材料与热加工物理模拟及数值模拟学术会议

作者： Guang-ru HUA1 a* Hong-yu WEN2.b Li-qiang AN1 c (1 School of Mechanical engineering North china {2. power University 619 Yonghua North Road Baoding Hebei Province 071003 china) (2.National Die & Mold CAD engineering Research Center shanghai Jiao Tong University 1954 Huashan Road shanghai 2.0030 china)

A thermal-mechanical analysis of metal forming based on meshfree method is performed. During the coupled analysis, two independent sub-systems, i.e. the velocity field and temperature field are considered. The effect of deformation on temperature field is added into the temperature solution by the vector of heat flux generated by internal energy, and the effect of temperature on plastic deformation is considered by the flow stress at that temperature. The unknown function of temperature distribution is constructed using reproducing kernel approximation. Contours of the temperature field of a metal ring under compression are obtained. Using the thermal-mechanical coupling method, the results are compared with those obtained by FEM and experiment to verify the accuracy of the proposed method.

关键词： Thermal-mechanical Meshfree method Metal forming Reproducing kernel approximation

有外回路的金属管屏蔽单电流磁场源的电路法解析

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上海交通大学学报 2005年第S1期39卷 67-70页

作者：徐霖傅正财宋春燕上海交通大学电子信息与电气工程学院上海200030 杭州市电力局杭州310009

有外回路的金属管能有效屏蔽单电流磁场源,但屏蔽效果的计算要用数值方法,不便于应用.本文提出用电路法求解其屏蔽效能,推导了电路参数,给出了便捷的磁场和屏蔽效果解析计算式,并用边界元法计算软件和实验测量方法进行了验证.最后,给出... 详细信息

有外回路的金属管能有效屏蔽单电流磁场源,但屏蔽效果的计算要用数值方法,不便于应用.本文提出用电路法求解其屏蔽效能,推导了电路参数,给出了便捷的磁场和屏蔽效果解析计算式,并用边界元法计算软件和实验测量方法进行了验证.最后,给出了工程应用的实例.

关键词：磁场屏蔽单向电流金属管电路数值计算

Wind and Solar Energy Combining with Reverse Osmosis System for Brackish Water Desalination

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Wind and Solar Energy Combining with Reverse Osmosis System ...

2.12.环境污染与大众健康学术会议

作者： Qi Houbo 1 , Zhang Pan 2., Hu Jingtao 2., Zhou Ting 2.,Li Wei 2.1 School of Nuclear Science and engineering, North china {2. power University, Beijing, china 2.Sino-Canada Resources and Environmental Research Academy, North china {2. power University, Beijing, china

Solar and wind energy could be used as a means for reverse osmosis desalination as the drive. In this paper some attempts have been made to present some work of the highlights that are important efforts around the world in the field of renewable energy for RO system. In addition, the weakness of solar and wind power is intermittently, therefore batteries are necessary. Both of the energy can be transferred into electricity and then could be the power of the pump, so the pump is the bridge between the renewable energy and the reverse osmosis module. Moreover, response surface methodology （RSM） has been used to develop the predictive model especially for the feed pressure condition.

关键词： Wind and solar energy Reverse osmosis Desalination Response surface methodology

Optimal Energy Management for a Complex Hybrid electric Vehicle:Tolerating power-loss of Motor

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Journal of shanghai Jiaotong university(Science) 2009年第4期14卷 476-481页

作者：张培智殷承良张勇吴志伟 School of Mechanical engineering Shanghai Jiaotong University

The energy management may perform well under normal conditions, but may lead to poor behavior under abnormal situations. To tackle this problem, an optimal control strategy called rule-based equivalent fuel consumption minimization strategy （RECMS） is developed for a new complex hybrid electric vehicle （CHEV）. It optimizes the energy efficiency and drive performance to cater for normal and power-loss operations of the tractive motor. Firstly, the strategy formulates a novel objective function based on the equivalent fuel concept. By accounting for the actual fuel cost, the equivalent fuel cost for the electric machines and virtual fuel cost for the drivability, the cost function is obtained. Furthermore, some penalty factors are presented to optimize the performance target. Finally, experiments for a practical CHEV are performed to validate a simulation model. Then simulations are carried out for both rule-based and RECMS. The results show that the optimal energy management is working well.

关键词： optimal energy management hybrid electric vehicle control strategy equivalent fuel consumption Dower-loss

Motion Planning of Inspection Robot Suspended on Overhead Ground Wires for Obstacle-navigation

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Motion Planning of Inspection Robot Suspended on Overhead Gr...

2.09中国控制与决策会议

作者： Ren Zhi-bin~(1,2.,Ruan Yi~2.Li Zheng~2.Yang Yong~2.1.School of Mechanical and electrical Eneineerine,Jianexi University of Scince and Technology,Jiangxi 341000 2.School of Mechatronics engineering and Automation,{2. University,{2. 2.0072

＜正＞The purpose of inspection robot for power transmission lines is to check running state and find damages of extra-high voltage（EHV） power transmission lines *** key of the control design is how to design a robot for obstacles *** paper presents the robot configuration,and describes obstacle-navigation control *** the horizontal pose of the body is kept through the gripping mechanism,the gripping force will become bigger,and result in the damage of *** a centroid adjustment method,which enables the centroid of inspection robot to adjust is proposed in this *** then paper presents expert system with hybrid architecture and analyzes decision-making of obstacle-navigation in layered planning ***-line experiment results show that the control strategy can guide the inspection robot to patrol along the transmission lines and cross obstacles efficiently.

关键词： power transmission line inspection robot centroid adjustment obstacles navigation automatically

Application of Wavelet Analysis Theory in Storage Energy System of Lithium Battery

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Application of Wavelet Analysis Theory in Storage Energy Sys...

第三十届中国控制会议

作者： HAN Xiaojuan~1,CHEN Xiaojun~1,LI Jianlin~2.HUI Dong~2.1.Control and Computer engineering College,University of North china {2. power,Beijing 102.06,P.R.china 2.china electrical engineering & New Material Department,china {2. power Research Institute,Beijing,100192.P.R.china

＜正＞The group technology is the bottleneck of large-scale lithium battery storage energy *** estimate of residual capacity of SOC（state of charge） is an important method to realize large-scale group technology and the resistance of battery is a major index evaluating *** analysis theory is used for equivalent circuit model of lithium battery aiming at the characteristics of output signal with gaussian white noise when the lithium battery is discharged or *** output of current signal and voltage signals in lithium battery are decomposed into multi-scale functions by choosing the optimum wavelet base function to realize filter processing of noise signals,and then the filtered signals be reconstructed to obtain more accurate battery *** with the traditional filtering method（LMS adaptive method）,wavelet filtering method provided in this paper can effectively remove interference signals and realize accurately estimate of SOC for lithium battery in large-scale battery storage energy system with certain practical significance for group technology.

关键词： Wavelet analysis Battery resistance SOC Equivalent circuit model

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变压缩比下自由活塞式内燃发电机的效率分析

上海交通大学学报 2009年第5期43卷 745-749页

作者：李庆峰肖进黄震上海交通大学动力机械与工程教育部重点实验室上海200240

利用Matlab/Simulink软件耦合Chemkin程序以及电磁场有限元工具对均质混合压燃(HCCI)自由活塞式内燃发电机(FPLA)建立仿真模型,分析了不同负荷和燃空当量比下FPLA的可变压缩特性,以及系统效率和输出电功率.结果表明:FPLA能够根据负荷灵... 详细信息

利用Matlab/Simulink软件耦合Chemkin程序以及电磁场有限元工具对均质混合压燃(HCCI)自由活塞式内燃发电机(FPLA)建立仿真模型,分析了不同负荷和燃空当量比下FPLA的可变压缩特性,以及系统效率和输出电功率.结果表明:FPLA能够根据负荷灵活调节压缩比,以拓宽内燃机的运行范围;在高压缩比下能够大幅提高内燃机的效率与输出功率.

关键词：自由活塞发电机压缩比效率