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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Niemann, Henrik Poulsen, Niels Kjølstad Department of Electrical Engineering Automation and Control Technical University of Denmark Building 326 LyngbyDK-2800 Kgs. Denmark Dept. of Applied Mathematics and Computer Science Section for Dynamical Systems Technical University of Denmark LyngbyDK-2800 Kgs. Denmark

ISBN: (纸本)9783902823625

Active fault isolation of parametric faults in closed-loop MIMO systems are considered in this paper. The fault isolation consists of two steps. The first step is group-wise fault isolation. Here, a group of faults is isolated from other possible faults in the system. The group-wise fault isolation is based directly on the input/output signals applied for the fault detection. It is guaranteed that the fault group includes the fault that had occurred in the system. The second step is individual fault isolation in the fault group. Both types of isolation are obtained by applying dedicated auxiliary inputs and the associated residual outputs. © IFAC.

关键词： Fault detection

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Model-Based Predictive control Scheme for Cost Optimization and Balancing Services for Supermarket Refrigeration systems

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IFAC Proceedings Volumes 2014年第3期47卷 975-980页

作者： H.H.M. Weerts S.E. Shafiei J. Stoustrup R. Izadi-Zamanabadi Department of Electrical Engineering Eindhoven University of Technology Eindhoven Netherlands Automation and Control Department of Electronic Systems Aalborg University Aalborg Denmark Danfoss A/S 6430 Nordborg Denmark

A formulation of model predictive control for supermarket refrigeration systems is proposed to facilitate the regulatory power services as well as energy cost optimization of such systems in the smart grid. Nonlinear dynamics existing in large-scale refrigeration plants challenges the predictive control design. It is however shown that taking into account the knowledge of different time scales in the dynamical subsystems makes possible a linear formulation of a centralized predictive controller. A realistic scenario of regulatory power services in the smart grid is considered and formulated in the same objective as of a cost optimization one. A simulation benchmark validated against real data and including significant dynamics of the system is employed to show the effectiveness of the proposed control scheme.

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Attitude synchronization for multiple flexible spacecraft based on non-smooth control

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IFAC Proceedings Volumes 2014年第3期47卷 9968-9972页

作者： Haibo Du Yigang He Shihua Li Yingying Cheng Xisong Chen School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China

This paper considers the problem of attitude synchronization for a group of flexible spacecraft based on distributed attitude cooperative control strategy. Based on the backstepping design, non-smooth control, and the neighbor-based design rule, a distributed attitude control law is constructed step by step. Under the proposed control law, it is shown that the attitude synchronization is achieved asymptotically and the induced vibration by flexible appendages is simultaneously suppressed.

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Quantized filtering design for Markovian jump systems with defective mode information

Quantized filtering design for Markovian jump systems with d...

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International Conference on Mechatronics and control (ICMC)

作者： Yanling Wei Jianbin Qiu Yuan Fan Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin China School of Electrical Engineering and Automation Anhui University Anhui China

ISBN: (纸本)9781479925391

This paper is concerned with the problem of quantized H ∞ filtering for a class of continuous-time Markovian jump linear systems with defective mode information. By virtue of a mode-dependent logarithmic quantizer, the measurement output of the plant is quantized, and the defective mode information in the Markov stochastic process simultaneously involves the exactly known, partially unknown and polytopic-type uncertain transition rates. By fully exploring the properties of transition rate matrices, together with the convexification of uncertain domains, a new quantized H ∞ performance analysis criterion is first derived and then the filter synthesis is developed. It is shown that via a linearisation procedure, a unified framework can be developed such that both the full-order and reduced-order filters can be obtained by solving a set of linear matrix inequalities. Finally, an illustrative example is given to show the effectiveness of the proposed design method.

关键词： Transmission line measurements Linear systems Markov processes Linear matrix inequalities Robustness Quantization (signal) Performance analysis

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Robust control reconfiguration of resource allocation systems with Petri nets and integer programming

Robust control reconfiguration of resource allocation system...

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作者： Li, Jun Zhou, Mengchu Guo, Tao Gan, Yahui Dai, Xianzhong Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education China School of Automation Southeast University Nanjing 210096 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States

Supervisory control reconfiguration can handle the uncertainties including resource failures and task changes in discrete event systems. It was not addressed to exploit the robustness of closed-loop systems to accommodate some uncertainties in the prior studies. Such exploitation can cost-efficiently achieve reconfigurability and flexibility for real systems. This paper presents a robust reconfiguration method based on Petri nets (PNs) and integer programming for supervisory control of resource allocation systems (RASs) subject to varying resource allocation relationships. An allocation relationship is seen as a control specification while the execution processes requiring resources as an uncontrolled plant. First, a robust reconfiguration mechanism is proposed. It includes updating the P-invariant-based supervisor and evolving the state of the closed-loop system. The latter adapts to the control specification changes by the self-regulation of the closed-loop system's state. Next, two novel integer programming models for control reconfiguration are proposed, called a reconfiguration model with acceptability and reconfiguration one with specification correction. Since both models integrate the firability condition of transitions, no additional efforts are required for the state reachability analysis. Finally, a hospital emergency service system is used as an example to illustrate them. © 2014 Elsevier Ltd. All rights reserved.

关键词： Integer programming

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Approximation-error-ADP-based optimal tracking control for chaotic systems with convergence proof

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Chinese Physics B 2013年第9期22卷 305-311页

作者：宋睿卓肖文栋孙长银魏庆来 School of Automation and Electrical Engineering University of Science and Technology Beijing The State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences

In this paper, an optimal tracking control scheme is proposed for a class of discrete-time chaotic systems using the approximation-error-based adaptive dynamic programming （ADP） algorithm. Via the system transformation, the optimal tracking problem is transformed into an optimal regulation problem, and then the novel optimal tracking control method is proposed. It is shown that for the iterative ADP algorithm with finite approximation error, the iterative performance index functions can converge to a finite neighborhood of the greatest lower bound of all performance index functions under some convergence conditions. Two examples are given to demonstrate the validity of the proposed optimal tracking control scheme for chaotic systems.

关键词： chaotic systems approximation error adaptive dynamic programming optimal tracking control

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Adaptive cubature strong tracking information filter using variational Bayesian method 19

Adaptive cubature strong tracking information filter using v...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Ge, Quanbo Wen, Chenglin Chen, Shaodong Sun, Ruoyu Li, Yuan Institute of Systems Science and Control Engineering School of Automation Hangzhou Dianzi University Hangzhou Zhejiang310018 China Luoyang Institute of Electro Optical Equipment of AVIC Luoyang Henan471000 China Department of Electrical and Computer Engineering University of Minnesota MinneapolisMN55414 United States Information Engineering School Shenyang University of Chemical Technology Shenyang Liaoning100142 China

ISBN: (纸本)9783902823625

For most practical nonlinear state estimation problems, the conventional nonlinear filters do not usually work well for some cases, such as inaccurate system model, sudden change of state-interested and unknown variance of measurement noise. In this paper, an adaptive cubature strong tracking information filter using variational Bayesian (VB) method is proposed to cope with these complex cases. Firstly, the strong tracking filtering (STF) technology is used to integrally improve performance of cubature information filter (CIF) aiming at the first two cases and an iterative scheme is presented to effectively evaluate a strong tracking fading factor. Secondly, the VB method is introduced to iteratively evaluate the unknown variance of measurement noise. Finally, the novel adaptive cubature information filter is obtained by perfectly combining the STF technology with the VB method, where the variance estimation provided by the VB method guarantees normal running of the strong tracking functionality. © IFAC.

关键词： Information filtering

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Consensus control of a class of nonlinear systems with communication time delay

Consensus control of a class of nonlinear systems with commu...

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2014 American control Conference, ACC 2014

作者： Sheng, Jie Shao, Chenhui Ding, Zhengtao Ji, Haibo Department of Automation University of Science and Technology of China Hefei 230027 China Department of Mechanical Engineering University of Michigan Ann Arbor 2350 Hayward St. Ann Arbor MI 48109 United States Control Systems Centre School of Electrical and Electronic Engineering University of Manchester Manchester M13 9PL United Kingdom

ISBN: (纸本)9781479932726

This paper investigates the consensus control of a class of Lipchitz nonlinear multi-agent systems with communication time delay. Upon exploring certain features of Laplacian matrix, global consensus control conditions are identified using Lyapunov method in the time domain. The proposed control only uses relative state information of the system. Numerical simulations validate the effectiveness of the proposed controller design and show its performance with different nonlinearities and time delays. © 2014 American Automatic control Council.

关键词： Nonlinear systems

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Sensor system for unsteady flow characteristics in a sonic nozzle with vapor condensation

Sensor system for unsteady flow characteristics in a sonic n...

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International Instrumentation and Measurement Technology Conference

作者： Chao Wang Hongbing Ding Yakun Zhao Yong Yan Yonghui hu Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Instrumentation Control and Embedded Systems Group School of Engineering and Digital Arts University of Kent School of Control and Computer Engineering North China Electric Power University

ISBN: (纸本)9781467363846

Experiments on periodic, unsteady compressible flow in a sonic nozzle with heat addition were reported. This unsteady flow is caused by the condensation of water vapor in the sonic nozzle which will affect the flow rate of the sonic nozzle. A dimensional analysis for the essential effect factors of unsteady flow frequency was carried out. An experimental system including a sensor for pressure oscillation monitoring was built. The experimental results agree well with the simulation and semi-empirical formula. Both the sensor and experimental results can be used to further study the effect of unsteady flow due to the condensation of water vapor on the flow rate of the sonic nozzle.

关键词： fast pressure sensor frequency characteristics unsteady flow rate vapor condensation sonic nozzle

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Leader-Following Output Consensus in a Network of Linear Agents with Communication Noises

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IFAC Proceedings Volumes 2014年第3期47卷 1825-1830页

作者： Yunpeng Wang Long Cheng Zeng-Guang Hou Min Tan Ming Wang State Key Laboratory of Management and Control for Complex Systems (SKLMCCS) Institute of Automation Chinese Academy of Sciences Beijing 100190 China School of Information and Electrical Engineering Shangdong Jianzhu University Jinan 250101 China

The leader-following output consensus problem of multi-agent systems (MAS) is studied in this paper. Each agent is modeled by a single-input single-output (SISO) system which can be further described by a controllable and observable linear state space model. An observer is constructed to estimate the agent's state, and the estimated state is shared with neighbor agents via the noisy communication channels. Similar to the previous work, in the proposed protocol a time-varying gain is employed to attenuate the noise's effect. However, in this paper, each agent is allowed to have its own time-varying gain. Some sufficient conditions on the time-varying gain are given for ensuring the consensus in the mean square sense. Finally, a simulation example is presented to verify the theoretical results.

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