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An improved fuzzy logic controller for speed optimization of harry-ward type motor

International Journal of Simulation: Systems, Science and Technology 2016年第26期17卷 36.1-36.9页

作者： Li, Zairan Shi, Kai Cui, Tongzhan Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin300072 China Wenzhou Vocational & Technical College Wenzhou325035 China

Harry-Ward control system is a widely used speed control system of DC motors. In this paper, we propose a fuzzy logic based speed control system further optimized by considering state variables and transfer functions. The simulation is performed using the tool Simulink in Matlab. The fuzzy control method is improved to detect errors of input signals, filter the whole process and change the error signals. The simulation shows that the fuzzy logic controller algorithm gives better performance compared with conventional control, largely reduces the error in speed, and continuously adapts to give a more robust approach to the motor speed control system. Several experiments are performed and we conclude that the proposed algorithm gives higher efficiency of the speed control in motor. © 2017, UK Simulation Society. All rights reserved.

关键词： Errors

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Adaptive Backstepping Tracking control of a 6-DOF Unmanned Helicopter

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IEEE/CAA Journal of Automatica Sinica 2015年第1期2卷 19-24页

作者： Bin Xian Jianchuan Guo Yao Zhang the Institute of Robotics and Autonomous System Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

This paper presents an adaptive backstepping control design for a class of unmanned helicopters with parametric uncertainties. The control objective is to let the helicopter track some pre-defined position and yaw trajectories. In order to facilitate the control design, we divide the helicopter's dynamic model into three subsystems. The proposed controller combines the backstepping method with online parameter update laws to achieve the control objective. The global asymptotical stability (GAS) of the closed-loop system is proved by a Lyapunov based stability analysis. Numerical simulations demonstrate that the controller can achieve good tracking performance in the presence of parametric uncertainties. © 2014 Chinese Association of automation.

关键词： Backstepping Closed loop control systems Closed loop systems controllers Flight dynamics Helicopters

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Fault Tolerant Flight-control via control Allocation for Reusable Launch Vehicles with Aerodynamic control Surfaces Stuck

Fault Tolerant Flight-Control via Control Allocation for Reu...

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第35届中国控制会议

作者： Dezhi Xu Yao Tang Nan Ji Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education)Institute of Automation Jiangnan University Editorial Office of Journal Systems Engineering and Electronics

ISBN: (纸本)9781509009107

In this paper,a reconfiguration flight-control via control re-allocation is developed for a reusable launch vehicle(RLV) under aerodynamic control surfaces *** dynamic control re-allocation scheme is based on real-time computation of linear matrix inequalities(LMIs).In the approach proposed here,control allocation is formulated as an optimization problem to minimize the performance *** into account non-negligible dynamics of the actuators with hard constraints,the presented scheme extends the existing algorithms by providing asymptotic tracking of time-varying input commands for a class of ***,simulation results of X-3 3 reentry vehicle model dynamic show the effectiveness of the reconfiguration approach developed in this study.

关键词： Actuator faults stuck fault-tolerant control(FTC) linear matrix inequalities(LMIs) reusable launch vehicle(RLV)

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Stabilization of Discrete-Time Switched Systems with All Unstable Modes 34

Stabilization of Discrete-Time Switched Systems with All Uns...

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第三十四届中国控制会议

作者： WANG Yijing ZOU Yanchao LI Shulan ZUO Zhiqiang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781467374439

Stabilization problem for discrete-time switched systems with all unstable modes is investigated in this paper. Following the idea of getting into each unstable mode and analyzing its internal behavior, the state dynamical decomposition technique is used to convert such a problem to an equivalent one for the inter-decoupled switched systems. The proposed mode-dependent average dwell time approach(MDADT) ensures each sub-state switched system is globally exponentially stable. Moreover, a periodical switching law is designed to guarantee the asymptotic stability of discrete-time switched systems. Finally, a numerical example is given to show the validity of the main results.

关键词： Discrete-time switched systems,Stabilization,Mode-dependent average dwell-time(MDADT),Unstable modes,State dynamical decomposition

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Finite-Time Consensus of Double Integrator Multi-Agent Systems Subject to Input Saturation 34

Finite-Time Consensus of Double Integrator Multi-Agent Syste...

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第三十四届中国控制会议

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

ISBN: (纸本)9781467374439

This paper investigates the finite-time consensus problem for double integrator multi-agent systems where each agent is subject to input saturation. The global leader-following consensus can be achieved in finite time over directed and detailbalanced communication topology under the proposed control protocol, which employs a priori saturation in order to deal with the constraints imposed on the control input and simplify the analysis. Utilizing the tools from the algebraic graph theory, Lyapunov theory and homogeneity of system dynamics with dilation, we prove in a universal way that our designed consensus protocol can solve the global finite-time consensus problem. The effectiveness of the theoretical result is illustrated with numerical simulations.

关键词： Multi-agent systems,Finite-time consensus,Input saturation,Double integrator dynamics,Directed topology

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Electrical Resistance Tomography System with Long-Distance Data Transmission Function 34

Electrical Resistance Tomography System with Long-Distance D...

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第三十四届中国控制会议

作者： ZHANG Jinyu TAN Chao DONG Feng Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781467374439

As a type of process parameter measuring technique, Electrical Resistance Tomography(ERT) has the characteristic of simple structure and working mechanism, low cost, no radiation, rapid response and ability of visualization. It is suitable for the process parameter monitoring of closed pipes and vessels in the industrial production process. However, the existing ERT systems are mainly used the design scheme of laboratory instrumentation, and the data acquisition and processing unit uses only the local integration mode. It doesn't have long-distance data transmission function, are unable to connect with industrial control systems, and limits its application in actual industrial process. In order to solve the above problems, a design scheme of ERT System with long-distance data transmission function is put forward. An optical fiber data transmission mode based on Aurora protocol is applied to implement the high speed and reliable data transmission. By check the control words based on the finite state machine, the remote switching of system working modes is realized. The ERT system with long-distance data transmission function is verified with experiments.

关键词： Electrical Resistance Tomography,system design,long-distance data transmission,optical fiber,Aurora protocol

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LQG control for Networked control Systems in the Presence of Data Packet Drops

LQG Control for Networked Control Systems in the Presence of...

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第35届中国控制会议

作者： Kun Xu Jianming Zhou Fei Liu Guoxiang Gu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of AutomationJiangnan University School of Electrical Engineering and Computer Science Louisiana State University

ISBN: (纸本)9781509009107

We study the linear-quadratic-Gaussian(LQG) control for multiple-input/multiple-output(MIMO) discrete-time networked control systems(NCSs) in the presence of data packet drops that are modeled as multiplicative noises,assumed to be white *** will first analyze the mean square(MS) stability problem for MIMO feedback systems in the presence of the multiplicative noises,and provide a new useful MS stability *** LQG control under packet data drops will then be studied in which the critical probability of the received data packet can be computed by solving a set of linear matrices inequalities(LMIs),beyond which the modified algebraic Riccati equations,associated with the LQG control,admit the stabilizing *** a numerical example from the known literature is employed to illustrate our results.

关键词： Networked control system LQG control data packet drop

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Tracking of Stribeck Friction based on Second-Order Linear Extended State Observer

Tracking of Stribeck Friction based on Second-Order Linear E...

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第28届中国控制与决策会议

作者： Lijun Wang Qing Li Ruihua Jiao Yixin Yin Yinan Feng Yichang Liu 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

ISBN: (纸本)9781467397155

To deal with the problem of observing or tracking for discontinuous signal,a kind of second order linear extended state observer(LESO) algorithm is *** ESO estimating the uncertain disturbance,a simple second-order linear ESO with less tunable parameters was designed in the absence of dynamic model,and the method of discrete time realization was *** proposed LESO was applied to the tracking of discontinuous Stribeck Friction in comparison with adaptive state *** results show that the proposed ESO is effective and practical.

关键词： Extended State Observer Adaptive State Observer Stribeck Friction Discontinuous Track

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A Geometric Extension Design for Second-Order Nonlinear Agents Formation Surrounding a Sphere

A Geometric Extension Design for Second-Order Nonlinear Agen...

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第28届中国控制与决策会议

作者： Yang-Yang Chen Kai-Xuan Wang Ya Zhang Cheng-Lin Liu Qin Wang School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast University Chien-Shiung Wu College Southeast University Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Institute of AutomationJiangnan University College of information engineering Yangzhou University

ISBN: (纸本)9781467397155

This article deals with the problem of driving a family of second-order nonlinear agents to land on a sphere and formation tracking a set of given orbits on the sphere.A novel geometric extension called the concentric compression method is proposed to give a solution to spheral landing and then combines with the control of spherical meridian and parallel to achieve formation motion along given orbits on the *** asymptotic stability of system is proved by Lyapunov-based method when the communication topology is *** effectiveness of the analytical result is verified by a numerical simulation.

关键词： Formation tracking Sphere landing Geometric Extension Second-Order Nonlinear Agents

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Modelling and Optimization of Heating Dispatch in Thermal Power Plant

Modelling and Optimization of Heating Dispatch in Thermal Po...

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第28届中国控制与决策会议

作者： Lixia Xie Yali Wu Xianyong Peng Lei Li Fan Yi School of Automation and Information Engineering Xi'an University of Technology Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Emerson Process Management Co.Ltd.

ISBN: (纸本)9781467397155

With the addition of heating in thermal power *** to lack of guidance for heating scheduling in traditional scheduling mode,it has been unable to satisfy the current costs for energy conservation and saving of thermal power *** load distribution(especially heat load dispatch) is an important subject in the operation optimization of a thermal power *** model of heat load dispatch on the condition of economic power dispatch is established and linear programming for optimized heat load distribution among units based on LINGO is *** average distribution and linear programming distribution are contrasted in a thermal power *** is obviously shown by simulation and calculation that linear programming distribution gets more optimal results than current average *** has important significance to reduce energy consumption and save costs.

关键词： Heating Dispatch Thermal Power Plant LINGO

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