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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Xuan Ma Rongjun Tang Jingyan Kang Qing Liu Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of Technology Xi'an China Faculty of Automation and Information Engineering

ISBN: (纸本)9781509040940

In this paper, we propose an approach based on the use of artificial fish swarm algorithm (AFSA) for solving the problem of multicast routing on application layer. Taking delay, stretch, and degree as three optimization objectives, we design the behaviors of artificial fish individual (AF), i.e. moving randomly, preying, following, and use Pareto ranking to evaluate the fitness of AF. The simulation results show that the proposed algorithm is an appropriate method to explore the search space of the complex problem and leads to good solutions in a reasonable amount of time.

关键词： Delays Routing Optimization Fish Network topology Algorithm design and analysis Visualization

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Repeated Strike Process During Disconnector Operation in Ultra-High Voltage Gas-Insulated Switchgear

Repeated Strike Process During Disconnector Operation in Ult...

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作者： Guan, Yonggang Cai, Yuanji Chen, Weijiang Liu, Weidong Li, Zhibing Yue, Gongchang Zhang, Junmin State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing100084 China State Grid Corporation of China Beijing100031 China China Electric Power Research Institute Beijing100192 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China

Very fast transient over-voltage (VFTO), induced by disconnector operations in gas-insulated switchgears, has become the limiting dielectric stress at ultra-high voltage levels. Much work has been done to investigate single-strike waveforms of VFTO. However, little study has been carried out investigating the repeated strike process, which would influence VFTO significantly. In this paper, we carried out 450 effective experiments in an ultra-high voltage test circuit, and conducted calculations through the Monte Carlo simulation method, to investigate the repeated strike process. Firstly, the mechanism of the repeated strike process is proposed, based on the experimental results. Afterwards, statistical breakdown characteristics of disconnectors are obtained and analyzed. Finally, simulations of the repeated strike process are conducted, which indicate that the dielectric strength recovery speed and polarity effect factor have a joint effect on VFTO. This study enhances the understanding of the nature of VFTO, and may help to optimize the disconnector designed to minimize VFTO.

关键词： Monte Carlo methods

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Adaptive-Periodic control for Nonlinear Dynamic Object with Delays on State Set of Functioning

Adaptive-Periodic Control for Nonlinear Dynamic Object with ...

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International Siberian Conference on control and Communications

作者： Eugenie L. Eremin Evgeniy A. Shelenok Information and Control Systems Department Amur State University Blagoveshchensk Russia Automation and System Engineering Department Pacific National University Khabarovsk Russia

For a priori undetermined nonlinear multi-mode dynamic object with several statement delays and the relative order greater than one, it offers a combined adaptive control system, synthesized using the hyperstability c... 详细信息

ISBN: (纸本)9781467383844

关键词： component control system combined regulator periodic signals generator dynamic corrector hyperstability criterion L-dissipativity delay

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Filtering and fusion of consensus-based multi-agent systems with imperfect constraints

Filtering and fusion of consensus-based multi-agent systems ...

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World Congress on Intelligent control and automation (WCICA)

作者： Yunze Cai Hengyu Duan Hua O. Wang Weidong Zhang Department of Automation Key Laboratory of System Control and Information Processing Shanghai China Department of Mechanical Engineering Boston University Boston MA USA

ISBN: (纸本)9781467384155

In state estimation (filtering) applications, state vector of a target always includes some a priori constraints, and utilizing such constraints will help obtain a more precise estimation. While in some cases, a significant issue lies in that when such constraints are not perfect, how we exploit them and improve the performance of estimation. Information contains “imperfection” sometimes because our knowledge of the real world is not absolutely right. This essay proposes a deep research on multi-agent systems with imperfect constraints and highly artificial intelligence: firstly, by using the projection method, results of traditional Kalman Filtering are projected onto the constrain subspace; secondly, based on consensus, this essay has thoroughly introduced the local information exchange and fusion strategy; and thirdly, simulations on target tracking have proved the feasibility and precision of the algorithms mentioned within this essay.

关键词： Decision support systems Intelligent control automation Next generation networking DVD

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Combined adaptive control system for nonlinear object with delay and self-tuning dynamic correction unit

Combined adaptive control system for nonlinear object with d...

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Dynamics of systems, Mechanisms and Machines (Dynamics)

This article considers the problem of constructing an adaptive control system for nonlinear priori uncertain dynamic object with statement delay and relative order greater than one. As methods of solving the hyperstab... 详细信息

ISBN: (纸本)9781509040513

关键词： control systems Heuristic algorithms Adaptive control Nonlinear dynamical systems Transfer functions Integrated circuit modeling Delays

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Adaptive Backstepping Tracking control of a 6-DOF Unmanned Helicopter

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IEEE/CAA Journal of Automatica Sinica 2015年第1期2卷 19-24页

作者： Bin Xian Jianchuan Guo Yao Zhang the Institute of Robotics and Autonomous System Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

This paper presents an adaptive backstepping control design for a class of unmanned helicopters with parametric uncertainties. The control objective is to let the helicopter track some pre-defined position and yaw trajectories. In order to facilitate the control design, we divide the helicopter's dynamic model into three subsystems. The proposed controller combines the backstepping method with online parameter update laws to achieve the control objective. The global asymptotical stability (GAS) of the closed-loop system is proved by a Lyapunov based stability analysis. Numerical simulations demonstrate that the controller can achieve good tracking performance in the presence of parametric uncertainties. © 2014 Chinese Association of automation.

关键词： Backstepping Closed loop control systems Closed loop systems controllers Flight dynamics Helicopters

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Bandwidth Allocation with Minimum Rate Constraints in Cluster-based Femtocell Networks

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International Journal of automation and computing 2015年第1期12卷 77-82页

作者： Kai Ma Liang Li Jie Yang Zhi-Xin Liu Xin-Bin Li Xin-Ping Guan School of Electrical Engineering Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information ProcessingMinistry of Education

Inter-femtocell interference becomes serious when femtocells are densely deployed. To mitigate the inter-femtocell interference, this paper proposes a cluster-based bandwidth allocation algorithm. We create femtocell clusters by constructing a weighted interference graph and allocate bandwidth to each cluster based on a Nash bargaining solution(NBS). Simulation results show that the cluster-based bandwidth allocation algorithm can reduce the inter-femtocell interference and meet the minimum rate constraint of each cluster.

关键词： Femtocell cluster inter-femtocell interference bandwidth allocation Nash bargaining solution(NBS)

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UKF Based Filtering and Curve Fitting for Estimating the Joint Stiffness of Stewart Platform

UKF Based Filtering and Curve Fitting for Estimating the Joi...

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2016 IEEE Chinese Guidance, Navigation and control Conference (IEEE CGNCC2016)

作者： Xin Li Shuling Dai Rui Zeng State Key Laboratory of Virtual Reality Technology and System/Aircraft Control Integration Technology Laboratory/School of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781467383196

In order to improve the precision of most control method for the Stewart platform,this paper gives a novel method to determine the joint stiffness to avoid the negative effect of the actuated joint *** establish the transfer function of the linearized model between the theoretical and the real value of joint deforming length so as to estimate the joint *** the same time,in view of the special noise of the distance measuring sensor output,the unscented Kalman filter is used in signal *** experimental results show that this method can obtain the joint stiffness parameters effectively.

关键词： filter UKF Based Filtering and Curve Fitting for Estimating the Joint Stiffness of Stewart Platform Stewart

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A Virtual-Waypoint Based Artificial Potential Field Method for UAV Path Planning

A Virtual-Waypoint Based Artificial Potential Field Method f...

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2016 IEEE Chinese Guidance, Navigation and control Conference (IEEE CGNCC2016)

作者： Yuecheng Liu Yongjia Zhao State Key Laboratory of Virtual Reality Technology and System/Aircraft Control Integration Technology Laboratory/ School of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781467383196

Unmanned aerial vehicle(UAV) path planning is an important preliminary step in UAV mission *** potential field(APF) UAV path planning method is often employed to build an intuitive model which is updated by the additional forces pushing the trajectory away from threats of non-cooperative objects and toward the predefined ***,APF has its own weaknesses,one of which is the local minima close to concave *** tackle situation mentioned above,we propose a novel additional force model based on virtual *** model provides additional forces for candidate planning points falling into local minimum area and help them escape from local minimum *** the candidate is trapped in minimum area,firstly we calculate measure factor according to the planning area containing current candidate and the target point,and thus determine position of the virtual *** the virtual waypoint generates additional control force so that the candidate can run away from the local minimum ***,the simulation results show that the method can solve the local minimum problem in planning space.

关键词： UAV A Virtual-Waypoint Based Artificial Potential Field Method for UAV Path Planning Virtual

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Three-dimensional Route Planning Considering Threat Blind Area

Three-dimensional Route Planning Considering Threat Blind Ar...

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2016 IEEE Chinese Guidance, Navigation and control Conference (IEEE CGNCC2016)

作者： Jian Guo Xiaoyong Lei State Key Laboratory of Virtual Reality Technology and System/Aircraft Control Integration Technology Laboratory/School of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781467383196

The terrain defilade effect was utilized to propose a low altitude penetration 3D route planning method in consideration of blind ***,the digital elevation map and blind space model were established to obtain the terrain blind space ***,the blind space data was invocated in real-time in the planning ***,A algorithm was promoted and the planned route was smoothing *** results show that the planned route can achieve terrain avoidance and threat avoidance by using blind space ***,the smoothing process algorithm has obtained good smoothing effects.

关键词： Three-dimensional Route Planning Considering Threat Blind Area

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