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第三十四届中国控制会议

作者： Xile Wei Kaili Si Meili Lu Jiang Wang Bin Deng Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University School of Informational Technology and Engineering Tianjin University of Technology and Education

ISBN: (纸本)9781467374439

Based on the two-compartment neuron model, the influence of neuronal morphology on firing and phase response curves(PRC) of cells are investigated. And by means of PRC, the relationship between neuronal morphology and network synchronization stimulated by extracellular electric field is studied. Results showed that the excitability of neurons can present different types when the morphological parameter is different. Furthermore, the sensitivity of neuronal synchronization to extracellular electric field has big difference for different morphological parameters.

关键词： Two-compartment neuron,synchronization,extracellular electric field,morphology,phase response

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Robust tracking control design for a flexible air-breathing hypersonic vehicle

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Journal of Central South University 2014年第1期21卷 130-139页

作者：张垚鲜斌刁琛赵勃郭建川 Institute of Robotics and Autonomous System Tianjin Key Laboratory of Process Measurement and ControlSchool of Electrical Engineering and AutomationTianjin University

A nonlinear robust controller was presented to improve the tracking control performance of a flexible air-breathing hypersonic vehicle(AHV) which is subjected to system parametric uncertainties and unknown additive time-varying *** longitudinal dynamic model for the flexible AHV was used for the control ***-gain observers were designed to compensate for the system uncertainties and additive *** gain theorem and Lyapunov based stability analysis were utilized to prove the stability of the closed loop *** uniformly ultimately bounded tracking of the vehicle's velocity,altitude and attack angle were achieved under aeroelastic effects,system parametric uncertainties and unknown additive ***/Simulink simulation results were provided to validate the robustness of the proposed control *** simulation results demonstrate that the tracking errors stay in a small region around zero.

关键词： hypersonic vehicles nonlinear robust control flexible mode small gain theorem Lyapunov

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Odor sources mapping with D-S inference in time variant airflow environments via a mobile robot

Odor sources mapping with D-S inference in time variant airf...

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IEEE International Conference on Cyber Technology in automation, control, and Intelligent Systems

作者： Li Ji-Gong Zhou Jie-Yong Sun Biao Liu Jia Yang Li Tianjin Key Laboratory of Process Measurement and Control Tianjin China School of Automation and Electrical Engineering Tianjin University of Technology and Education Tianjin China Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin China School of Electrical Engineering and Automation Tianjin University Tianjin China

This paper addresses the problem of localization of multiple odor sources using a mobile robot in a time-variant airflow environment, and provides a mapping method which uses the Dempster-Shafer (D-S) theory to reason the possible locations of several odor sources. In the proposed method, the robot carries out the D-S inference and iteratively updates a grid map in which each cell has two states (i.e., occupied by an odor source, and not occupied by odor source), using the successive measurements from a gas sensor and an anemometer when the robot is cruising in the given search area. Considering the fact that in outdoor environments air almost always flow and vary with time, estimated air-mass paths are used to construct the belief mass functions of the D-S inference. Here the air-mass path is defined as the trajectory most likely taken by an air mass encountered with the mobile robot in a time-varying airflow environment, and an air mass can contain odor molecules and bring them to the robot, or not contain odor molecule and just pass by the robot. Simulations are carried out and the results in a time-variant airflow environment show that the locations of the multiple odor sources can be mapped online with the proposed method.

关键词： Mobile robots Atmospheric modeling Estimation Robot sensing systems Trajectory Algorithm design and analysis

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An Improved Command Switching controller Design for Turbofan Aero-engine

An Improved Command Switching Controller Design for Turbofan...

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第三十四届中国控制会议

作者： Chun-Hao Zhao Xi-Ming Sun Chao Chen Jun Zhao The School of Control Science and Engineering Dalian University of Technology The State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University) College of Information Science and EngineeringNortheastern University

ISBN: (纸本)9781467374439

An improved command switching control strategy is proposed to solve the multi-objective switching control problem with the acceleration and temperature safety protection for turbofan aero-engines. An improved switching law is designed to avoid frequent switching. Properly designed integrator reset technique is utilized to improve the thrust tracking *** control parameters can be optimized to obtain satisfactory safety and acceleration performance. The proposed switching controller is applied to a linear parameter-varying model of the aero-engine. Simulation shows that the proposed switching control strategy can bring the improvement on both safety and acceleration.

关键词： Aero-engine,switching control,multi-objective control

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A high-order sliding mode stator flux observer for asynchronous motor based on feedback linearization

A high-order sliding mode stator flux observer for asynchron...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Yuedou Pan Tao Chen School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) Beijing China

ISBN: (纸本)9781467376839

This paper proposes a high-order sliding mode stator flux estimation method for asynchronous motor based on feedback linearization. Selecting the rotor flux as the system's output, the coordinate change matrix and the nonlinear state feedback are derived based on the affine nonlinear model of asynchronous motors by using the nonlinear system's differential geometry theory. Then the asynchronous motor system is input-output linearized and the feedback linearization model of asynchronous motors is obtained. On this basis, a high-order sliding mode rotor flux observer for asynchronous motor is designed to estimate rotor flux, and this paper analysis the stability of the designed observer, then we can calculate stator flux by using the rotor flux. The designed observer is applied to Direct Torque control (DTC) of the asynchronous motor and achieves a good control performance. Simulation results verify the effectiveness and feasibility of the proposed method.

关键词： Stators Observers Rotors DC motors Nonlinear systems State feedback

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Distributed consensus of linear multi-agent systems with fault tolerant control protocols 33

Distributed consensus of linear multi-agent systems with fau...

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第三十三届中国控制会议

作者： ZUO Zhiqiang ZHANG Jun WANG Yijing Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781479947249

In this paper,the problem of fault tolerant consensus control of linear multi-agent systems is investigated using two control protocols,namely,the fixed-gain control protocol and the adaptive-gain control *** the first part,a fixed-gain control protocol is proposed which guarantees the consensus under all possible actuator *** a two-step constructive algorithm of the fixed-gain control protocol is *** the second part,the failure rate-based adaptive control protocol is developed to compensate for the failure effects on multi-agent *** of the fixed gain,the adaptive gain in the control protocol is time varying with respective to the online estimation of failure rates,which follows the projection operator adaptive ***,a criterion is derived for reaching consensus under the adaptive-gain control protocol when the multiagent systems are subjected to actuator *** procedures to construct the adaptive-gain control protocol are *** examples are finally included to illustrate the theoretical results.

关键词： Multi-agent systems,Consensus,Fault tolerant control,Fixed-gain control protocol,Adaptive-gain control protocol

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A novel model and behavior analysis for a swarm of multi-agent systems with finite velocity

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Chinese Physics B 2014年第9期23卷 590-593页

作者：王良顺吴治海 Key Laboratory of Image Processing and Intelligent Control of the Ministry of Education School of AutomationHuazhong University of Science and Technology Key Laboratory for Advanced Process Control of Light Industry of the Ministry of Education School of Internet of Things EngineeringJiangnan University

Inspired by the fact that in most existing swarm models of multi-agent systems the velocity of an agent can be infinite, which is not in accordance with the real applications, we propose a novel swarm model of multi-agent systems where the velocity of an agent is finite. The Lyapunov function method and LaSalle＇s invariance principle are employed to show that by using the proposed model all of the agents eventually enter into a bounded region around the swarm center and finally tend to a stationary state. Numerical simulations are provided to demonstrate the effectiveness of the theoretical results.

关键词： multi-agent systems swarm finite velocity attraction and repulsion

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Active Disturbance Rejection control for Nonlinear Two-tank Liquid Level Cascade Systems with Model Uncertainties

Active Disturbance Rejection Control for Nonlinear Two-tank ...

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The Society of Instrument and control Engineers Annual Conference 2015

作者： Lijun Wang Fen Zhang Qing Li Yixin Yin Qing Zheng Yumeng Zhang School of Automation & Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology Beijing Department of Electrical and Computer Engineering Gannon University

Due to the nonlinearities, model uncertainties and disturbances of the two-tank liquid level cascade system,active disturbance rejection controller(ADRC) solution was developed. First, a nonlinear mechanism model and its linearized model were built based on the theories of fluid dynamics for the system. Second, first-order linear ADRCs for the outer loop of the two cascade systems with an unknown order were designed, respectively. With a simple integrator as the normalized type of the feedback system, other parts of dynamic system which are different from the normalized type are treated as the total disturbances. The disturbances were estimated by the second-order linear extended state observer and compensated in the control law. Then the system, with nonlinearities, uncertainties and disturbances, is reduced to only a linear integrator. In comparison with the traditional PI controller, simulation results show that both the proposed ADRCs have better robustness and adaptability against model uncertainties.

关键词： Two-tank systems,nonlinear systems,uncertain systems,cascade systems,active disturbance rejection control

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Online identification of multivariable nonlinear processes with iterative structure learning and application to a diesel engine 19

Online identification of multivariable nonlinear processes w...

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

作者： Kowalczyk, Marek Yi, Boliang Isermann, Rolf Institute of Automatic Control and Mechatronics Laboratory of Control Engineering and Process Automation Technical University Darmstadt Germany

ISBN: (纸本)9783902823625

This contribution presents a new methodology for the online identification, which allows the modeling of the stationary and dynamic behavior of nonlinear combustion engines with many input and output variables in short time with an appropriate model structure. The used models are local polynomial model trees. The necessary enhancements and adaptations of the identification algorithm for local polynomial model trees for the online methodology are presented. To enable an online identification, not only the parameters but also the structure of the models has to be adapted to the ongoing measuring procedure at a test bench. This structure adaptation methods use iteratively recorded measured data for the determination of an optimized model partition and regressor selection regarding the quality and complexity of the model. This maximizes the iterative improvement of the mathematical model, leading to a reduced test bench time. The applicability of the developed methodology is shown for the identification of a model from both, an artificial test function as well as a real diesel engine. © IFAC.

关键词： Iterative methods

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Multi-pipeline System Scheduling under Demand Uncertainty

Multi-pipeline System Scheduling under Demand Uncertainty

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第26届中国过程控制会议（CPCC2015）

作者： Wang Jishuai Gu De Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences State Key Lab.of Industrial Control Technology Institute of Cyber-systems and Control Zhejiang University Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University

In this paper, a discrete mathematical approach to solve scheduling of multi-pipeline systems for petroleum products under demand uncertainty is presented. To deal with the uncertainty, the conditional value-at-risk(CVAR) analysis is adopted as a risk measure. Firstly an improved scheduling approach is proposed to model the multi-pipeline system with the consideration of different pipeline segment sizes. The improved formulation is computationally intractable when pipeline segments have distinct capacities. Then the model takes a scenario-based approach to cope with uncertainty in a CVAR framework. Computational results are presented to demonstrate the effectiveness of the proposed approach. All the instances are implemented using CPLEX.

关键词： Multiproduct pipeline Scheduling MILP formulation Pump

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