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Asian control Conference

作者： Meng Zhang Ming-Gang Gan Jie Chen Zhong-Ping Jiang State Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing China Department of Electrical and Computer Engineering New York University Brooklyn NY

ISBN: (纸本)9781509015740;9781509015733

This paper focuses on the optimal control of continuous-time linear time-varying uncertain systems with completely unknown internal dynamics and proposes a novel approach which leads to an optimal controller with guaranteed stability. A model-free algorithm of adaptive dynamic programming is employed to deal with the uncertainty of system parameters, yielding an optimal feedback controller for the system subject to a predefined cost. Then the stability of the system in time-varying uncertain situation which may undergo parameter changes or jumps is analyzed from the perspective of finite-time stability. On the basis of these results, a switching control strategy is presented to ensure the stability of the time-varying uncertain system with desired optimality properties in the long run. The effectiveness of the strategy is verified by simulations on a DC torque motor servo system.

关键词： Time-varying systems Stability analysis Symmetric matrices Asymptotic stability Uncertainty Optimal control

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Motion Detection Based on Improved Sobel and ViBe Algorithm 35

Motion Detection Based on Improved Sobel and ViBe Algorithm

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第35届中国控制会议

作者： ZHANG Yujia ZHAO Xiaoguang TAN Min State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences University of Chinese Academy of Sciences School of Computer and Control Engineering

ISBN: (纸本)9781509009107

Motion detection plays a crucial role in most video based applications.A particular background subtraction technique called ViBe(Visual Background Extractor) is commonly used to obtain foreground objects from the background due to its high detection rate and low computational ***,the performance is not very ***,this paper presents an improved ViBe algorithm to increase the accuracy and robustness of motion ***,a foreground feature map is created by optimizing the result of ViBe *** the edge detection of the original video frames is achieved after pre-sharpening using improved Sobel operator and Otsu ***,by feature fusion(of the foreground and background feature maps) and contour filling,the motion detection results can be *** experiments demonstrate the improvements of the proposed modifications at a limited additional cost.

关键词： Motion detection Otsu algorithm Sobel operator Visual Background Extractor(ViBe)

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Theranostics: Boosting Postsurgical Outcomes of Orthotopic Hepatocellular Carcinoma via an EpCAM-Targeting Theranostic Nanoparticle (Part. Part. Syst. Charact. 8/2019)

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Particle & Particle systems Characterization 2019年第8期36卷

作者： Min Hu Kun Wang Wenting Shang Ziyu Han Hongmei Jiang Chihua Fang Jie Tian Department of Hepatobiliary Surgery Zhujiang Hospital Southern Medical University Guangzhou 510280 China CAS Key Laboratory of Molecular Imaging The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China Department of Hepatobiliary Surgery The First Affiliated Hospital of Jinan University Guangzhou 510630 China Institute of Automation University of Chinese Academy of Sciences Beijing 100080 China Guangdong Provincial Clinical and Engineering Technology Research Center of Digital Medicine Guangzhou 510280 China

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An Initiative Service Method Based on Intention Understanding for Drinking Service Robot

An Initiative Service Method Based on Intention Understandin...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Man Hao Weihua Cao Min Wu Zhentao Liu Jin-Hua She Luefeng Chen Ri Zhang School of Automation China University of Geosciences Wuhan China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems School of Engineering Tokyo University of Technology Tokyo Japan

To ensure that people can supplement enough water at the right time, an initiative service method based on intention understanding for drinking service robot is proposed. Firstly, individual factors and environmental factors which are associated with personal intentions are collected. Secondly, users' intention and desire degree for intention are obtained by an improved Fuzzy-Context-specific Intention Inference method. Then the relationship between personal intention and human demands is established by an initiative service model. Finally, robots provide drinking water service initiatively according to humans' demands. Drinking service experiments are performed in a laboratory scenario using a humans-robots interaction system. The experimental results show that the drinking time of actual situation lags behind the initiative service time 25 minutes on average, and the initiative service renders drinking service 2 times more than actual situation on average, which demonstrates the feasibility of the proposal. In prospect, the initiative service method could be applied to many occasions in our daily life, e.g., family service, caring for the elderly, and medical rehabilitation.

关键词： Service robots Temperature Environmental factors Humidity Correlation

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Quantized effects on robust consensus of linear multi-agent systems via sliding-mode control

Quantized effects on robust consensus of linear multi-agent ...

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Annual Conference of Industrial Electronics Society

作者： Bo-Chao Zheng Yanmei Xue Guoying Miao Kun Li Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Nanjing China School of Mathematics and Statistics Nanjing University of Information Science and Technology Nanjing China CICAEET Nanjing University of Information Science and Technology Nanjing China School of Information and Control Nanjing University of Information Science and Technology Nanjing China

In this paper, the analysis of quantized effect on robust distributed consensus of linear uncertain multi-agent systems(MASs) via sliding-mode control(SMC) is investigated. Two kinds of phenomena on input quantization, including quantization mismatch and quantization measurement saturation, are analyzed. It shows that robust distributed consensus of linear uncertain MASs via SMC strategy might not be well achieved when the two kinds of quantization phenomena are ignored in the control design. Several research ideas for quantized feedback robust consensus via SMC strategy are finally discussed.

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Integrated capacity planning and production control of a parallel-machine manufacturing system

Integrated capacity planning and production control of a par...

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2016 IEEE International Conference on Automation Science and engineering, CASE 2016

作者： Chen, Wenliang Wang, Zheng Key Laboratory of Measure and Control of Complex Engineering Systems School of Automation Southeast University Nanjing Jiangsu210096 China

ISBN: (纸本)9781509024094

Optimal capacity planning and optimal production control are both very important to the improvement of the performance of a manufacturing system. However, in existing research and practice, the two problems are usually studied separately, although they actually depend on each other. In this paper, we investigate the problem of integrated capacity planning and production control of a multiple-parallel machine and single-part-type manufacturing system, in which every machine has the same maximum production rate, failure rate and repair rate, so that better performances on both sides can be obtained. To solve this problem, firstly, we develop the method of computing the probability distribution of the state variables for a parallel-machine system under the hedging point policy. Based on that, the average production cost for inventory holding and demand backlog are evaluated. A derivative-based analytical method of optimizing the hedging point is proposed to minimize the production cost, and a binary search algorithm is employed to optimize the production capacity. Finally, numerical experiments are conducted to verify the feasibility of this method, and the effectiveness of this algorithm. © 2016 IEEE.

关键词： Production control

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Data-based robust near-optimal decentralized stabilization of unknown large-scale systems

Data-based robust near-optimal decentralized stabilization o...

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IEEE Symposium Series on Computational Intelligence (SSCI)

作者： Bo Zhao Derong Liu Yuanchun Li State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China School of Automation Guangdong University of Technology Guangzhou China Department of Control Science and Engineering Changchun University of Technology Changchun China

This paper investigates a data-based robust decentralized stabilizing control scheme for unknown large-scale systems via adaptive critic designs. The control consists of near-optimal stabilizing control and adaptive robustifying compensation. In order to avoid the common assumptions of boundedness and matched condition on interconnections, the actual states of interconnected subsystems are replaced with their desired ones. By using local input-output data, the subsystem dynamics can be obtained by neural network (NN) identifier. Then, with the help of local critic NN, the near-optimal decentralized control is derived via identifier-critic architecture for corresponding subsystems. Considering the replacement error, identification error and approximation error as overall error, an adaptive robustifying term is added to overcome it in real-time. Simulation example is given to verify the effectiveness of the present control scheme.

关键词： Integrated circuits Robustness Artificial neural networks Cost function Decentralized control Approximation error Adaptive systems

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On the nonexistence of event-based triggers that preserve Gaussian state in presence of package-drop

On the nonexistence of event-based triggers that preserve Ga...

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American control Conference

作者： Enoch Kung Junfeng Wu Dawei Shi Ling Shi Electronic and Computer Engineering Hong Kong University of Science and Technology Department of Automatic Control The Royal Institute of Technology (KTH) State Key Laboratory of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology

ISBN: (纸本)9781509045839

State estimation is a core objective in cyber-physical systems. In the state estimation problem over linear systems, the Kalman filter is the standard solution. The filter is the format on which the solutions to subsequent estimation problems are based. Among these problems are the estimation problem in the presence of packet drops and estimation problem involving event-based triggers. We study in this paper both phenomena simultaneously. In an attempt to find the Kalman-like filter, which proves the Gaussianity of the state and offers a set of update equations, our paper shows that no such filter exists. More precisely, one cannot find an event-based trigger such that under possible packet drops, the state variable remains a Gaussian variable. This conclusion can be reasonably extended to a more general setting.

关键词： State estimation Packet drops Event-based triggers State estimation Event-based Filters State variable TRIGGERS Gauss

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Bifurcation behaviors of an Euler discretized inertial delayed neuron model

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Science China(Technological Sciences) 2016年第3期59卷 418-427页

作者： HE Xing LI ChuanDong HUANG TingWen YU JunZhi School of Electronics and Information Engineering Southwest University Chongqing 400715 China Texas A & M University at Qatar Doha 5825 Qatar State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China

This paper presents an Euler discretized inertial delayed neuron model, and its bifurcation dynamical behaviors are discussed. By using the associated characteristic model, center manifold theorem and the normal form method, it is shown that the model not only undergoes codimension one(flip, Neimark-Sacker) bifurcation, but also undergoes cusp and resonance bifurcation(1:1 and 1:2) of codimension two. Further, it is found that the parity of delay has some effect on bifurcation behaviors. Finally, some numerical simulations are given to support the analytic results and explore complex dynamics, such as periodic orbits near homoclinic orbits, quasiperiodic orbits, and chaotic orbits.

关键词： resonance bifurcation Euler discretized inertial delayed neural network

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Adaptive droop control with self-adjusted virtual impedance for three-phase inverter under unbalanced conditions 50

Adaptive droop control with self-adjusted virtual impedance ...

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50th IEEE International Symposium on Circuits and systems, ISCAS 2017

作者： Lu, Zelun Li, Wenxuan Li, Zhen Chen, Xi Lu, Herbert H. C. Dong, Ning Liu, Xiangdong School of Automation Key Laboratory for Intelligent Control and Decision on Complex Systems Beijing Institute of Technology BeijingI0008I China Global Energy Interconnection Research Institute North America Santa Clara 5451 Great America Parkway CA95054 United States School of Electrical Electrical and Computer Engineering University of Western Australia CrawleyWA6009 Australia

ISBN: (纸本)9781467368520

Three-phase inverter is a very important interface in microgrid. Droop control and virtual impedance are widely used to improve the power sharing capability and stability of such system, which however becomes ineffective under unbalanced conditions and may even cause potential stability problems. This paper proposes a fully self-adjusted virtual impedance design to guarantee the decoupling of active and reactive power. The arbitrary unbalanced information is acquired through the pseudo-inverse impedance matrix modeled by full-dq technique. Based on the unbalanced impedance identified, the adaptive droop control is achieved for not only accurate power sharing but also reliable voltage support with autonomous unbalanced voltage compensation. Simulations results verify the accurate identification of unbalanced impedance and effectiveness of the proposed method on the unbalanced compensation. © 2017 IEEE.

关键词： Electric inverters

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