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2018 Annual American control Conference, ACC 2018

作者： He, Wei Abraham Soriano-Rangel, Carlos Ortega, Romeo Astolfi, Alessandro Mancilla-David, Fernando Li, Shihua Ministry of Education School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Nanjing210096 China University of Colorado Denver Department of Electrical Engineering Denver United States Laboratoire des Signaux et Systemes Supelec Plateau du Moulon Gif-sur-Yvette91192 France Department of Electrical and Electronic Engineering Imperial College London LondonSW72AZ United Kingdom

ISBN: (纸本)9781538654286

We develop in this paper an adaptive passivity-based controller for output voltage regulation of DC-DC buck-boost converter with unknown constant power load. This control problem is theoretically challenging since the average model of the converter is a bilinear second order system that, due to the presence of the constant power load, is non-minimum phase with respect to both states. A solution to the problem was recently reported in [9], however, the resulting control law is extremely complicated to be of practical interest. The aim of the paper is to design a novel, significantly simpler, controller that can be easily implemented in applications. The key modifications introduced in the new design are the use of a change of coordinates and a partial linearization that transform this system into a cascade form, to which an adaptive energy-shaping controller is applied. Another merit of the designed control law, besides its simplicity, lies in that it is amenable for the addition of an outer-loop PI that improves its transient and disturbance rejection performances. Simulations and experimental results are provided to assess the improved performance of the proposed controller. © 2018 AACC.

关键词： Mathematical model Load modeling Asymptotic stability Voltage control Adaptation models Adaptive systems Stability analysis"

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Spherical Formation Enclosing control for Second-Order Agents with An Unknown Target 36

Spherical Formation Enclosing Control for Second-Order Agent...

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第36届中国控制会议

作者： CHEN Yang-Yang DONG Yi LIN Tailai SUN Hao ZHA Junyu School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast University School of Automation Nanjing University of Science and Technology

ISBN: (纸本)9781538629185

This paper deals with the cooperative control problem for second-order agents formation circling along meridian and parallel on a given sphere centered at a target of interest,where the direction of the target's movement is known to each agent but the target's speed is *** using local measurements of relative position,a novel distributed solution is proposed by separatively designing each agent's control input projected onto the spherical normal vector,the direction of spherical meridian and parallel.A second-order coordinated adaptive upgrade law is given to estimate the given target's speed by using adaptive backstepping and ***,a potential function is introduced to avoid the undefined angle coming from the trajectory between the poles of *** theoretical result is proved by the numerical simulation.

关键词： Spherical Formation Enclosing Coordinated Adaptive Estimation Potential Function

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An Effective Method for Forest Fire Smoke Detection

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Journal of Physics: Conference Series 2019年第5期1187卷 052045-052045页

作者： Qin, Luxing Wu, Xuehui Cao, Yichao Lu, Xiaobo School of Automation Southeast University Nanjing 210096 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China

This paper focuses on smoke detection in forest environments. In this paper, dark channel prior and OTSU based multi-threshold are used to find the disturbances such as sky and haze. These regions are blocked to reduce false alarm rate. A motion detection method based on frame difference is adapted to find the motion objects. Color moments, HOG and LBP are chosen as features of smoke and SVM is used as the classification. To reduce more false alarms, the motion regions are classified for several consecutive frames. They won’t be regarded as smoke regions unless M frames of them are classified as smoke ones. Experiment results showed that the proposed method can detect smoke in video effectively and work real-timely.

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Event-driven synchronization of Lur’e system subject to cyber attack

Event-driven synchronization of Lur’e system subject to cyb...

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第37届中国控制会议

作者： Liuwen Li Wenlin Zou Jie Cao Yushun Tan Shumin Fei School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast University School of Information Engineering Nanjing Xiaozhuang University School of Computer Science and Engineering Nanjing University of Science and Technology

This paper studies event-driven synchronization control problem for chaotic Lur’e system with cyber ***,In order to save network bandwidth resources,the event-driven scheme is employed to determine whether the sampled state should be transmitted to the ***,a synchronization error model is designed to describe the master-slave synchronization system with event-driven scheme and cyber ***,based on Lyapunov functional approach,sufficient conditions for stabilization are derived which can ensure synchronization of the master system and slave system;particularly,a co-designed approach of controller and the event-driven matrix is obtained using the above stability ***,a numerical example is presented to illustrate the effectiveness of the proposed approach.

关键词： synchronization event-driven scheme cyber attack Lur’e system

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Co-design of event generator and synchronous controller for chaotic neural networks with quantization

Co-design of event generator and synchronous controller for ...

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第37届中国控制会议

作者： Liuwen Li Wenlin Zou Shumin Fei Yushun Tan School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University School of Information Engineering Nanjing Xiaozhuang University School of Computer Science and Engineering Nanjing University of Science and Technology

This paper studies co-design of event generator and synchronous controller for chaotic neural networks with quantization. A quantized event-triggered scheme is presented to reduce the load of network transmission. Sufficient stabilization conditions for synchronization error system are derived on the basis of Lyapunov-Krasovskii *** on the above stability condition, a co-designed parameters of controller and the corresponding event-triggered parameters are obtained. Finally, a numerical example is employed to illustrate the effectiveness of the proposed control method.

关键词： Synchronization Event generator Chaotic neural networks Quantization

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Event-driven synchronization of chaotic neural networks subject to actuator saturation

Event-driven synchronization of chaotic neural networks subj...

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第37届中国控制会议

作者： Liuwen Li Wenlin Zou Jie Cao Shumin Fei Yushun Tan School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University School of Information Engineering Nanjing Xiaozhuang University School of Computer Science and Engineering Nanjing University of Science and Technology

This paper discusses event-driven synchronization control problem for chaotic neural networks subject to actuator saturation. Firstly, in order to reduce the load of network, the event-driven scheme is introduced to determine whether the sampled state should be sent to the controller. Secondly, a synchronization error model is constructed to describe the master-slave synchronization system with event-driven scheme and actuator saturation in a unified ***, based on Lyapunov-Krasovskii functional, sufficient conditions for stabilization are obtained which can ensure synchronization of the master system and slave system;particularly, co-design of controller and the event-triggered matrix is achieved based on the above stability condition. Lastly, a numerical example is presented to show the effectiveness of the proposed approach.

关键词： synchronization event-driven scheme neural networks actuator saturation

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Cooperative control of multiple agents with unknown high-frequency gain signs under unbalanced and switching topologies

arXiv

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arXiv 2018年

作者： Wang, Qingling Psillakis, Haris E. Sun, Changyin School of Automation Southeast University Nanjing210096 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing China School of Electrical and Computer Engineering National Technical University of Athens Athens15780 Greece

Existing results on cooperative control of multiagent systems with unknown control directions require that the underlying topology is either fixed with a strongly connected graph or switching between different strongly connected graphs. Furthermore, in most cases the graph is assumed to be balanced. This paper proposes a new class of nonlinear PI based algorithms to relax these requirements and allow for unbalanced and switching topologies having a jointly strongly connected basis. This is made possible for single-integrator (SI) and double-integrator (DI) agents with non-identical unknown control directions by a suitable selection of the distributed nonlinear PI functions. Moreover, as a special case, the proposed algorithms are applied to strongly connected and fixed graphs. Finally, simulation examples are given to show the validity of our theoretical results. Copyright © 2018, The Authors. All rights reserved.

关键词： Multi agent systems

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Nonlinear L2 disturbance attenuation control design of UPFC for power flow control 29

Nonlinear L2 disturbance attenuation control design of UPFC ...

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第29届中国控制与决策会议

作者： Xingyu Lv Bangjun Lei Shumin Fei Office of Educational Administration Guizhou Institute of Technology School of Electrical and Information Engineering Guizhou Institute of Technology Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSchool of AutomationSoutheast University

ISBN: (纸本)9781509046584

A nonhnear L disturbance attenuation control（DAC） of unified power flow controller（UPFC） is investigated in power system by using Hamiltonian function ***,the dissipative Hamiltonian structure of the UPFC system is established by means of variable ***,based on the obtained dissipative Hamiltonian structure,a nonhnear L DAC is put *** results on the two-area four-machine power system demonstrate the effectiveness and robustness of the nonhnear L DAC in comparison with that of direct feedback linearization control（DFLC） and add-On self-tuning（ST） control and PI *** research results show that the nonhnear L DAC has better performance than the other controls.

关键词： UPFC uncertain nonlinear dynamical system Hamiltonian function method nonlinear L2 DAC

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Nonlinear Robust control Design for Static Synchronous Compensator 29

Nonlinear Robust Control Design for Static Synchronous Compe...

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第29届中国控制与决策会议

ISBN: (纸本)9781509046584

This article proposes a nonhnear robust control design for Static Synchronous Compensator(STATCOM) to improve stability and oscillation damping of power *** the parameter deviations,external disturbances and unmodeled dynamics,the nonhnear dynamic model of STATCOM can be translated into a Hamiltonian structure by means of coordinate *** on the Hamiltonian structure of STATCOM,a nonhnear robust(NR) control is designed for *** simulation results on the two-area four-machine power system demonstrate the robustness and effectiveness of the proposed NR control in comparison with the feedback linearization(FL) *** comparative study results indicate that the NR control has better performance than the FL control.

关键词： STATCOM Nonlinear Robust control Hamiltonian Function Method Asymptotic Stability

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Nonlinear robust control design for SSSC to improve damping oscillations and transient stability of power system 36

Nonlinear robust control design for SSSC to improve damping ...

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第36届中国控制会议

作者： Bangjun Lei Xiang Wu Shumin Fei Key Laboratory of power big data of Guizhou Province College of Electrical and Information EngineeringGuizhou Institute of Technology School of Mathematical Sciences Guizhou Normal University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSchool of AutomationSoutheast University

ISBN: (纸本)9781538629185

In this article, a nonlinear robust（NR） control is designed for static synchronous series compensator（SSSC） to improve transient stability and oscillation damping of power system. By taking the parameter deviations, external disturbances and unmodeled dynamics into account, the nonlinear dynamic model of SSSC can be changed into a Hamiltonian structure with the help of coordinate transformation. Based on the Hamiltonian structure of SSSC, a nonlinear robust control is designed for SSSC. Numerical simulation results on the two-area four-machine power system demonstrate the robustness and effectiveness of the proposed nonlinear robust control in comparison with the direct feedback linearization（FL） control. The study results show that the nonlinear robust control has better performance than the FL control.

关键词： SSSC nonlinear robust control Hamiltonian function method oscillations damping transient stability

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