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2012 2nd International Conference on Consumer Electronics, Communications and Networks, CECNet 2012

作者： Yang, Zhengling Song, Yanwen Wang, Teng Li, Yan School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Tianjin Key Laboratory of Process Measurement and Control Tianjin 300072 China

ISBN: (纸本)9781457714153

In order to detect expressway traffic incidents veritably, the probabilistic identifying results are suggested to demonstrate the traffic jam/congestion detection by traffic flow. First, the noise series in a traffic flow is decomposed by wavelet denoising and by second kind Fourier analysis denoising respectively. Second, hypothesis testing by chi-squared distribution is employed to sort out the robust variance (scale) estimators. Last, assuming that the detected flow point with possible congestion follows a normal distribution with the mean of the decomposed signal and the variance estimated from the decomposed noise series previously, the confidence levels of congestions are generated in a probabilistic form. Numerical experiments show that the probabilistic identifying results by this three steps method are reliable and reasonable. © 2012 IEEE.

关键词： Normal distribution

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Gain scheduled L-two-L-infinity filtering for neutral systems with jumping and time-varying parameters

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控制理论与应用（英文版） 2012年第1期10卷 118-123页

作者： Yanyan YIN Fei LIU Yan SHI Key Laboratory of Advanced Process Control for Light Industry （Ministry of Education） Institute of Automation Jiangnan University Wuxi Jiangsu 214122 China School of Industrial Engineering Tokai University 9-1-1 Toroku Kumamoto 862-8652 Japan

In this paper, global exponential stochastic stability based continuous gain-scheduled robust L-two-L- infinity filtering problem is studied for a class of stochastic neutral systems subject to time-varying parameters. First, the stochastic time-varying neutral systems are described by a series of stochastic time-constant systems at some selected time points, then based on stochastic Lyapunov-Krasovskii functional approach, a new globally exponentially stochastically stabilizable criterion is derived for each of the jumping system by means of linear matrix inequalities. Subsequently, L- two-L-infinity filtering systems are designed for such linear jump systems. Finally; continuous gain-scheduled approach is employed to design time-varying filter systems for the whole working region. A simulation example shows the effectiveness and potential of the developed techniques.

关键词： Time-varying neutral system Gain scheduling Exponential stochastic stability L-two-L-infinity filter-ing Markov jump

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Multilinear model-based PI control of block-oriented nonlinear systems

Multilinear model-based PI control of block-oriented nonline...

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2011 International Conference on Electrical, Information engineering and Mechatronics, EIEM 2011

作者： Du, Jingjing Zhang, Xinliang Song, Chunyue School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 China State Key Laboratory of Industrial Control Technology Institute of Industrial Process Control Zhejiang University Hangzhou 310027 China

ISBN: (纸本)9781447124665

In order to overcome the drawbacks of the conventional nonlinearity inversion control method for block-oriented systems, a Multi-PI control method is proposed. The virtue of the proposed method is that the classic PI control algorithm is applied to complex nonlinear systems, which largely simplifies the control problems and improves control performances. Simulations demonstrate the effectiveness of the proposed Multi-PI control method for block-oriented systems with strong nonlinearity. © 2012 Springer-Verlag London Limited.

关键词： Nonlinear systems

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Command switching strategy based safety protection control for aeroengines

Command switching strategy based safety protection control f...

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2012 UKACC International Conference on control, control 2012

作者： Chen, Chao Sun, Xi-Ming State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang 110819 China School of Control Science and Engineering Dalian University of Technology Dalian 116024 China

ISBN: (纸本)9781467315609

Based on the simplified hypersonic air-breathing propulsion model, this paper studies the output regulation/ safety protection multi-objective switching control problem focusing on the safety boundaries existing during the working progressing. Command switching strategy based on the safety margin is researched. In the safe region with a sufficiently large safety margin, the regulation loop is active and the regulated output is controlled to track the reference signal as quickly as possible. But the protected loop will be switched on and the protected output will be forced to escape from dangers once the safety boundaries approach. A dynamical state feedback controller and a protection controller work in turn in a hysteresis switching way to guarantee the asymptotic tracking with certain safety performance. The conditions under which the asymptotic tracking could be guaranteed are given and the control parameters could be calculated by solving optimal problems. It is pointed out in this paper that the designing of the regulation controller and the protection controller could be implemented separately, and the control parameters could be optimized to get certain optimal performance index using numerical method. Finally, simulation researches are performed to verify the effectiveness of the given methods, which also indicate that the commands switching control can improve both safety margin and the dynamical performance indices than the single controller. © 2012 IEEE.

关键词： controllers

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Modified projective synchronization between genesio and rossler chaotic systems with uncertainties

Modified projective synchronization between genesio and ross...

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2012 International Conference on Electrical Insulating Materials and Electrical engineering, EIMEE 2012

作者： Du, Liming Wang, Fengying Liu, Jifei Pan, Rui State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shengyang Liaoning 110819 China Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang China

ISBN: (纸本)9783037854518

The paper discusses the modified projective synchronization of two different chaotic systems by nonlinear control laws, considering the conditions of the master-slave systems with uncertain parameters, the synchronization problem between Genesio system and Rossler system has been investigated, adopting the adaptive control method, a sufficient condition is attainted for the modified projective synchronization between master and slave system, finally, The control performances are verified by the numerical examples. © (2012) Trans Tech Publications, Switzerland.

关键词： Synchronization

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New criteria of reachable set estimation for time delay systems subject to polytopic uncertainties

New criteria of reachable set estimation for time delay syst...

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7th IFAC Symposium on Robust control Design, ROCOND'12

作者： Zuo, Zhiqiang Chen, Yinping Wang, Yijing Chen, Michael Z.Q. Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Department of Mechanical Engineering University of Hong Kong Hong Kong Hong Kong

ISBN: (纸本)9783902823038

The problem of reachable set estimation for linear systems subject to both time delay and polytopic uncertainties is considered in this paper. Our aim is to find a set as small as possible to bound the states starting from the origin by inputs with peak values. The Lyapunov-Krasovskii functional together with free-weighting matrix technique are proposed to derive some sufficient conditions for the existence of an ellipsoidal bound to estimate the states. This method eliminates the conservatism generated by Jensen's inequality and obtains a much tighter reachable set bound. In addition, the number of variables to be determined is smaller than the previous result based on the maximal Lyapunov functional. Finally, an example illustrates the merits of our proposed results. © 2012 IFAC.

关键词： Linear systems

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Robot visual servo control based on fuzzy adaptive PID

Robot visual servo control based on fuzzy adaptive PID

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2012 International Conference on Systems and Informatics, ICSAI 2012

作者： Dong, Jie Hu, Yu Peng, Kaixiang School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control of Iron and Steel Process Ministry of Education Beijing 100083 China

ISBN: (纸本)9781467301992

Visual servo control is one of the central issues in the research field of intelligent robot. In order to obtain more effective information from the environment, visual sensor is used in robot control. This paper sets up the suitable model of the robot, with mathematical formulas derivation of visual servo control. Fuzzy adaptive PID is introduced to IBVS, in order to get a better performance. The simulation result shows that control strategy is effective. © 2012 IEEE.

关键词： Intelligent robots

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Bounded synchronization of switched dynamical networks with non-identical nodes

Bounded synchronization of switched dynamical networks with ...

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2012 International Conference on Modelling, Identification and control, ICMIC 2012

作者： Du, Liming Wang, Fengying Qiao, Feng State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Ministry of Education of China China Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang 110819 China

ISBN: (纸本)9780956715715

This paper investigates the synchronization problem of a complex dynamical network with non-identical nodes and switching topology. Neither an equilibrium for each node nor a synchronization manifold is assumed to exist. We select average state trajectory as the target of synchronization and establish the error dynamical equations. Using single Lyapunov function method and the bounded synchronization theory, the switching law design method presented which guarantee the bounded synchronization of switched dynamical networks with non-identical nodes. Simulation results verify the validity of the results. © 2012 Huazhong Univ of Sci & Tec.

关键词： Synchronization

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A PXI based operating-strategy-configurable ERT for gas-water horizontal flow regime identification

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AIP Conference Proceedings 2012年第1期1428卷 182-188页

作者： Yang Cao Feng Dong Chao Tan Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

Electrical Resistance Tomography (ERT) technique has great prospective in industrial measurement and monitoring with merits of non-intrusive, non-radiant, visualization and etc. However, the application of this technique is restricted by its real-time performance. In this paper, the scheme of the Operating-Strategy-Configurable ERT system based on PXI module instruments has been proposed. The Operating-Strategy-Configurable ERT System can work in different working Strategies including 16-electrodes mode, 8-electrodes mode and 4-electrodes for different flow regime, 16-electrodes mode is used for imaging, 8-electrodes and 4-electrodes mode for regime identification and monitoring The result shows that, when the ERT system is working in dual-plane mode, the sampling speed of each plane is 625 frames/s at 16-electrodes mode, 1562frames/s at 8-electrodes mode, and 3125 frames/s at 4-electrodes mode. It has improved the system real-time performance. The characteristic value which is extracted by the wavelet from the measured data of each cross section shows that the system has a good capacity of identification flow regimes.

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Optimum design of vision sensor for the three-dimensional measurement of bubbles

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AIP Conference Proceedings 2012年第1期1428卷 160-166页

作者： T. Xue Y. X. Jin Z. F. Cao T. Zhang Tianjin Key Laboratory of Process Measurement and Control College of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

We develop a novel virtual stereo vision sensor which contains just single high-speed camera and two reflector sets to measure three-dimensional feature parameters of bubbles in the gas-liquid two-phase flow. The measurement principle of the binocular stereo vision sensor and the virtual stereo vision sensor are analyzed in detail. According to the mathematical model of the virtual stereo vision sensor, the structure parameters of virtual stereo vision sensor are optimized based on the actual size of view field, and the three-dimensional measurement error is analyzed. The three-dimensional modality and motion parameters are tested on the upstream bubble producing appliance. The experimental results show that the three-dimensional distance error of the virtual stereo vision sensor is better than 0.132mm and the relative error is better than 0.5%, and the three-dimensional motion trail of bubble is reconstructed.

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