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2011 IEEE International Conference on Service Operations, Logistics and Informatics, SOLI 2011

作者： Zhang, Jianhua Hong, Liu Wang, Shuliang Xu, Xiaoming Department of Control Science and Engineering Key Lab for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan 430074 China University of Shanghai for Science and Technology Shanghai Academy of System Science Shanghai 200093 China

ISBN: (纸本)9781457705731

With the economic developments, high speed railway has been paid many attentions in China and medium- short term planning of Chinese high speed railway network has been formed and most of the railways have been started into operations. In this paper, graph theory and complex network theory are adopted to assess the reliability of Chinese high speed railway network. The topological characteristics and real distances between pairs of stations are discussed to investigate the reliability of Chinese high-speed rail network. Several parameters are presented to investigate the topological characteristics and the reliability and robustness of the network subject to failures. The parameter called unit degree betweenness is proposed to assess the transport capacity of lines connecting with the nodes. The largest degree node-based attacks and the highest betweenness node-based attacks are involved into Chinese high speed railway network to assess the topological reliability and robustness. The results show that the highest betweenness node-based attacks are more effective to destroy the network than the largest degree node-based attacks. Moreover, the cumulative degree distribution and the real mileages of railways between pairs of stations can be fitted by Gauss functions, and the distribution of real shortest distances over all pairs of stations of the network is fitted by a normal distribution function. By the simulations, the critical stations, Guangzhou Station, Zhengzhou Station and Jinan Station for the largest degree node-based attacks, and Wuhan Station, Xuzhou Station and Shijiazhuang Station for the highest betweenness node-based attacks, can be obtained in this paper. © 2011 IEEE.

关键词： Graph theory

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Adaptive control of 6-DOF parallel manipulator

Adaptive control of 6-DOF parallel manipulator

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作者： Jin, Qinglong Chen, Wenjie School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing 100081 China

ISBN: (纸本)9789881725592

This paper presents an adaptive controller equipped with disturbance rejection capability for a 6 degrees of freedom (6-DOF) parallel manipulator. The control scheme is proposed given that the 6-DOF parallel manipulator system's parameters are all subject to uncertainties, and only the positions and the velocities of links are measurable. In this paper, the dynamics of the 6-DOF parallel manipulator is denoted in the Lagrange method, and, as well as an appropriate storage function, some important properties of the dynamics are derived to develop an adaptive controller which, by the penalty signal chosen, can drive the motion tracking error to zero asymptotically. Lyapunov theory is used to guarantee the stability of the system. Simulation results show that the 6-DOF adaptive control system has a good tracking performance in both normal and extreme limited working conditions. © 2011 Chinese Assoc of Automati.

关键词： Adaptive control systems

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Virtual realization of dynamic path planning in target-creator based on Vega/HLA

Virtual realization of dynamic path planning in target-creat...

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作者： Zhu, Wenbin Zhang, Juan Yu, Haixin Peng, Zhihong School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing 100081 China

ISBN: (纸本)9789881725592

The importance of testing for multi-targets detecting and tracking algorithms accelerates the current technologies of target-creator system which provides multiple and various targets. Traditional target-creator systems are mostly based on the physical devices or video stream. Based on the need of building virtual environment and realizing system integration, VR technology and HLA technology are applied to improve the efficiency. With VR technology, three-dimensional models and visual scenes are built effectively and method of dynamic path planning is put forward. Through HLA technology, targets position information will be interacted real time, so algorithm evaluation is available by comparing real positions and detection results. In this paper, a virtual target-creator system based on Vega/HLA is designed which cuts down the outlay and time of the experiment. © 2011 Chinese Assoc of Automati.

关键词： Motion planning

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Timeliness evaluation of task-oriented networked space-based information system

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Journal of systems Engineering and Electronics 2011年第4期22卷 621-627页

作者： Chen Chen 1,2,and Jie Chen 2,3 1.Department of Automation,Tsinghua University,Beijing 100084,P.R.China 2.School of Automation,Beijing Institute of technology,Beijing 100081,P.R.China 3.complex system intelligent control and Decision,Ministry of Education,Beijing 100081,P.R.China Department of Automation Tsinghua University Beijing 100084 P. R. China School of Automation Beijing Institute of Technology Beijing 100081 P. R. China School of Automation Beijing Institute of Technology Beijing 100081 P. R. China Complex System Intelligent Control and Decision Ministry of Education Beijing 100081 P. R. China

Task-oriented networked information system is an integrated information system which builds on multi-satellite networking to accomplish one or more tasks. In the background of emer- gency relief for applications, system working flow and response process are analyzed, and a timeliness effectiveness evaluation index system is constructed at multi-task level. The effectiveness is a measurement of promptness of information return. In evalua- tion process, system performance and tasks are associated, then an evaluation model based on efficacy function is established, and different evaluation criteria are selected for different tasks. A distributed simulation system is constructed, and the execution of task is decomposed. The simulation platform provides a comprehensive data source for evaluation. The results are easy to compare with each other, which reflects system time efficiency in different satellites networks and provides actual systems with basis and reference for design and application.

关键词： timeliness efficacy function space-based informationsystem simulation system.

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Adaptive control of air delivery system for PEM fuel cell using backstepping

Adaptive control of air delivery system for PEM fuel cell us...

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作者： Li, Peng Chen, Jie Cai, Tao Zhang, Bo School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Ministry of Education Beijing 100081 China

ISBN: (纸本)9788995605646

The proton exchange membrane (PEM) fuel cells have attracted significant attention due to high efficiency and low pollution. The performance and lifetime of the fuel cell power system depend on the heat and water management, gas flow control and pressure regulation. This paper focuses on the oxygen excess ratio regulation for the fuel cell system to improve the performance and extend the lifetime. Firstly, a third-order model of the air delivery subsystem is introduced based on suitable assumption and simplification. Secondly, the third-order model is transformed to the non-affine nonlinear form, and the oxygen excess ratio regulation is reconsidered as load current tracking problem. Using the backstepping technique and neural network, an adaptive controller is proposed for the tracking problem and guarantees the system's stability in presence of modeling errors, external disturbances and uncertainties. Finally, the simulation illustrates the effectiveness of the adaptive controller. © 2011 Asian control Association.

关键词： Backstepping

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Multi-group consensus via pinning control with non-linear heterogeneous agents

Multi-group consensus via pinning control with non-linear he...

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作者： Sun, Wei Bai, Yongqiang Jia, Rui Xiong, Rui Chen, Jie School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Ministry of Education Beijing 100081 China

ISBN: (纸本)9788995605646

The agents connected by networks are capable to reach a prescribed state if only a small fraction of them are controlled with feedback information. The present work tries to stabilize groups of non-linear agents in a directed network onto a stable state with several equilibriums. The agent dynamics can be identical or heterogeneous. But the agents in the same group share a same non-linear model. The conditions to reach multiple consensus states are provided under both non-switching and switching topologies. The maximum number of heterogeneous equilibriums is discussed. It is proved theoretically and by simulations that under certain conditions, pinning control can lead a multi-group network to reach a multi-valued consensus state. © 2011 Asian control Association.

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Recursive blind LMS parameter identification for single-input multiple-output system

Recursive blind LMS parameter identification for single-inpu...

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作者： Chen, Jie Ma, Tao Chen, Wenjie Zhang, Bo School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Ministry of Education Beijing 100081 China

ISBN: (纸本)9788995605646

A blind least-mean-squares (BLMS) algorithm is proposed for the parameter identification of single-input multiple-output (SIMO) systems. Without requiring knowledge of a reference signal, it is proved that the presented parameter estimates almost sure converge to their real value under the assumption that the observed noises are mutually independent distributed additive white sequence with known variance. The noise variance of observed signal is estimated from the eigenvalues of a matrix related to observed signal sequence firstly. We back our theoretical findings with experiments showcasing the potential merits of the BLMS in practice. © 2011 Asian control Association.

关键词： Eigenvalues and eigenfunctions

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Adaptive sliding mode control of electromechanical actuator with improved parameter estimation

Adaptive sliding mode control of electromechanical actuator ...

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作者： Li, Hao Bai, Yongqiang Su, Zhong School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology Ministry of Education Beijing 100081 China Key Laboratory of Modern Measurement and Control Technology Beijing Information Science and Technology University Ministry of Education Beijing 100101 China

ISBN: (纸本)9788995605646

An adaptive sliding mode control scheme for electromechanical actuator has been presented. The adaptive control strategy can estimate the uncertain parameters and adaptively compensate the modeled dynamical uncertainties, while the sliding mode control method overcomes the unmodelled dynamics. In the adaptive law an equivalent output injection of the sliding mode observer which contains the parameter estimation error is used, and estimates of parameters can approximate the true values without prediction-error that is typically used in compositive adaptive law. Due to the improved estimation of uncertain parameters, the sliding mode law can robustifies the design against model uncertainties with a small swithcing gain. Stability of the system with the proposed approach has been proved and it has also been shown that the system states can reach the sliding mode in finite time. Finally, the effectiveness of the proposed control scheme has been exhibited via simulation examples. © 2011 Asian control Association.

关键词： Parameter estimation

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Unsupervised robust adaptive filtering against impulsive noise

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Journal of systems Engineering and Electronics 2012年第1期000卷

作者： Tao Ma Jie Chen Wenjie Chen and Zhihong Peng School of Automation Beijing Institute of Technology Beijing 100081 P. R. China Key Laboratory of Complex System Intelligent Control and Decision(Ministry of Education) Beijing Institute of Technology Beijing 100081 P. R. China

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Cooperative Pollution Supervising and Neutralization with Multi-actuator-sensor Network

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自动化学报 2011年第1期37卷 107-112页

作者： SUN Wei School of Automation Beijing Institute of Technology Beijing 100081 P. R. China Key Laboratory of Complex System Intelligent Control and Decision (Beijing Institute of Technology) Ministry of Education Beijing 100081 P.R. China

现在的工作认为一个 multi-actuator-sensor 网络抵销的一种情形是污染在一个围住的区域采购的有毒的气体和磁道。当在致动器的工作量上到达平衡时，一个新奇算法被建议最小化系统信息无常。方法把 centroidal Voronoi 镶嵌细工(CVT ) ... 详细信息

现在的工作认为一个 multi-actuator-sensor 网络抵销的一种情形是污染在一个围住的区域采购的有毒的气体和磁道。当在致动器的工作量上到达平衡时，一个新奇算法被建议最小化系统信息无常。方法把 centroidal Voronoi 镶嵌细工(CVT ) 与一致策略相结合。这个区域的 CVT 保险致动器的一种本地最佳的位置配置，因此，察觉到的无常能被最小化。一致算法在致动器之中利用连接信息，并且帮助他们到达普通工作量。当工作量被平均时，一致部件将被终止或压制。一致部件可以推迟 CVT 配置的实现。但是它能被看作帮助致动器从本地最佳的 CVT 配置跳的不安。作为结果，信息无常可以进一步被减少。比较与一致策略在纯 CVT 算法和方法之间被拉。模拟验证了建议途径。

关键词：传感器 CVT 运算法则仿真

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