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decoupling control of Lateral Dynamics for 4WS Vehicle

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Journal of Donghua University(English Edition) 2003年第4期20卷 154-158页

作者：刘奋张建武屈求真 School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200030 School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200030n four wheel steering (4WS) feedback control system that simultaneously achieves both body sideslip angle and yaw rate responses always desirable regardless of changes in vehicle dynamics. Quantitative feedback theory (QFT) is offered as the main tool for designing the control law. Inverted decoupling is also employed to make multivariable quantitative feedback design easier. Various nonlinear analyses are carried out and show that the proposed control system is a robust decoupling controller which not only makes body sideslip angle and yaw rate of the vehicle track the desired reference input signals respectively but also satisfies the requirement of robustness for the control system. The results also indicate that the control system can make it available to realize ideal lateral steering dynamics tracking for vehicles.

An four wheel steering (4WS) feedback control system that simultaneously achieves both body sideslip angle and yaw rate responses always desirable regardless of changes in vehicle dynamics. Quantitative feedback theory (QFT) is offered as the main tool for designing the control law. Inverted decoupling is also employed to make multivariable quantitative feedback design easier. Various nonlinear analyses are carried out and show that the proposed control system is a robust decoupling controller which not only makes body sideslip angle and yaw rate of the vehicle track the desired reference input signals respectively, but also satisfies the requirement of robustness for the control system. The results also indicate that the control system can make it available to realize ideal lateral steering dynamics tracking for vehicles.

关键词： decoupling control Lateral Dynamics Four Wheel Steering

decoupling control Method Based on Neural Network for Missiles

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Journal of Beijing Institute of Technology 2005年第2期14卷 166-169页

作者：湛力罗喜霜张天桥 School of Mechatronics Engineering Beijing Institute of Technology Beijng100081 ChinaDepartment of Information and Communication Engineering Beijing Information Technology Institute Beijing 100101 China School of Mechatronics Engineering Beijing Institute of Technology Beijng100081 China School

In order to make the static state feedback nonlinear decoupling control law for a kind of missile to be easy for implementation in practice, an improvement is discussed. The improvement method is to introduce a BP neural network to approximate the decoupling control laws which are designed for different aerodynamic characteristic points, so a new decoupling control law based on BP neural network is produced after the network training. The simulation results on an example illustrate the approach obtained feasible and effective.

关键词： decoupling control relative degree decoupling matrix Lie derivative BP neural network

Fault-tolerant stator flux oriented decoupling control for dual three-phase permanent magnet motor without diagnosis and reconfiguration

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Science China(Technological Sciences) 2023年第11期66卷 3206-3218页

作者： HUANG LinSen ZHAO WenXiang TAO Tao CUI Jia ZHANG Qiang School of Electrical and Information Engineering National Center for International Research on Structural Health Management of Critical ComponentsJiangsu UniversityZhenjiang 212013China

In this paper,the fault-tolerant capability of the existing stator-flux-oriented decoupling control(SFOC)for the DTP-PM motor is investigated,and a simple fault-tolerant SFOC is further designed to enhance fault ***,the mathematical model of the DTP-PM motor in the stator-flux-oriented rotating coordinate system is *** SFOC is proposed to guarantee healthy operation performance,considering torque,flux linkage,and harmonic ***,the coupling relationship under open-phase conditions is *** assessed result shows that the coupling relationship between the harmonic and fundamental components results in conflicts and poor post-fault ***,the proposed SFOC includes an automatic deactivation module to detect conflicts with a variable *** conflicted harmonic current controllers can be excluded ***,fault-tolerant control can be remedied without diagnosing the specific fault scenario,and excellent faulttolerant capability can be ***,experiments on a DTP-PM motor are carried out to verify the feasibility and effectiveness of the proposed strategy.

关键词： dual three-phase motor stator flux orientation decoupling control fault-tolerant control open-phase fault

Dynamic Analysis and decoupling control of Octo-pneumatic Actuator Vibration Isolation Platform

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Chinese Journal of Mechanical Engineering 2009年第1期22卷 116-123页

作者： WANG Xiaolei YANG QinNun ZHENG Gangtie Department of Aerospace Engineering Harbin Institute of Technology Harbin 150001 China College of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China Department of Aeronautics andAstronautics Tsinghua University Beijing 100084 China

control of a six-DOF vibration isolation platform is generally difficult which is due to the strong coupling among its input and output channels. The dynamic behavior and decoupling approach of a six-DOF vibration isolation platform with eight pneumatic actuators are investigated. Owing to the symmetric configuration design of the platform, the coupling among different channels is greatly weakened. When the payload＇s principal axes of inertia parallel to the platform＇s axes of symmetry and the payload＇s center of mass is at the extension line of the platform＇s central axis, the motion can be decomposed into two independent single-input single-output channels and two independent two-input two-output subsystems. The second-order subsystems are decoupled further with the simultaneous matrix diagonalization. Thus a decoupling control strategy is developed. Effectiveness of the decoupling approach is verified through experiments of the platform, and the experimental results show that vibrations of the platform are attenuated obviously owing to the active control.

关键词： decoupling control vibration isolation eight actuators pneumatic actuator

An LMI-based decoupling control for electromagnetic formation flight

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Chinese Journal of Aeronautics 2015年第2期28卷 508-517页

作者： Huang Xianlin Zhang Chun Lu Hongqian Yin Hang Center for control Theory and Guidance Technology Harbin Institute of Technology

Electromagnetic formation flight （EMFF） leverages electromagnetic force to control the relative position of satellites. EMFF offers a promising alternative to traditional propellant-based spacecraft flight formation. This novel strategy is very attractive since it does not consume fuel. Due to the highly coupled nonlinearity of electromagnetic force, it is difficult to individually design a controller for one satellite without considering others, which poses challenges to communications. This paper is devoted to decoupling control of EMFF, including regulations, constraints and con- troller design. A learning-based adaptive sliding mode decoupling controller is analyzed to illustrate the problem of existing results, and input rate saturation is introduced to guarantee the validity of frequency division technique. Through transformation, the imposed input rate saturation is con- verted to state and input constraints. A linear matrix inequalities （LMI）-based robust optimal con- trol method can then be used and improved to solve the transformed problem. Simulation results are presented to demonstrate the effectiveness of the proposed decoupling control.

关键词： decoupling control Electromagnetic forces Electromagnetic formationflight Linear matrix inequalities Satellite control

Multivariable decoupling control of Civil Turbofan Engines Based on Fully Actuated System Approach

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Journal of Systems Science & Complexity 2023年第3期36卷 947-959页

作者： PENG Kai WANG Hongxia ZHANG Huanshui ZHANG Zhaorong YANG Fan School of Power and Energy Northwestern Polytechnical UniversityXi’an 710072China School of Electrical and Automation Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Applied Mathematics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina. Xi’an Aeronautics Computing Technique Research Institute AVICXi’an 710068China

Gas turbine engines must be operated by means of control,and how to achieve multivariable control decoupling with aero-engine control constraints is an open thorny issue attracting increasingly more *** paper considers the multivariable decoupling problems of aero-engines by using a compound controller,which originates from the fact that it is impossible to eliminate all the nonlinear dynamics of system to obtain desired constant linear closed-loop system by using full actuated control because of modeling errors and some physical *** controllers are involved in the compound *** is a fully actuated controller and the other is classical feedback *** order to use fully actuated control and maintain the accuracy of engine model,a full state scheduling linear parameter-varying(LPV)modeling method is proposed based on fuzzy neural network *** a general input matrix of the system,its generalized inverse is applied to design fully actuated controller to result in a pseudolinear *** with a feedback controller and control limiter,the control synthesis is *** simulation shows that the proposed method is possessed of a better decoupling and tracking effect compared with traditional control approach.

关键词： Compound control decoupling control fully actuated control turbofan engine

Genetic Optimization Algorithm of PID decoupling control for VAV Air-Conditioning System

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Transactions of Tianjin University 2009年第4期15卷 308-314页

作者：王江江安大伟张春发荆有印 School of Energy and Power Engineering North China Electric Power University School of Environment Science and Engineering Tianjin University

Variable-air-volume (VAV) air-conditioning system is a multi-variable system and has multi coupling control loops. While all of the control loops are working together, they interfere and influence each other. A multivariable decoupling PID controller is designed for VAV air-conditioning system. Diagonal matrix decoupling method is employed to eliminate the coupling between the loop of supply air temperature and that of thermal-space air temperature. The PID controller parameters are optimized by means of an improved genetic algorithm in floating point representations to obtain better performance. The population in the improved genetic algorithm mutates before crossover, which is helpful for the convergence. Additionally the micro mutation algorithm is proposed and applied to improve the convergence during the later evolution. To search the best parameters, the optimized parameters ranges should be amplified 10 times the initial ideal parameters. The simulation and experiment results show that the decoupling control system is effective and feasible. The method can overcome the strong coupling feature of the system and has shorter governing time and less over-shoot than non-optimization PID control.

关键词： genetic algorithm decoupling control PID control variable air volume air-conditioning system

Research and Practice of decoupling control Based on the dual-chamber electric furnace

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Research and Practice of Decoupling Control Based on the dua...

Analytical decoupling control of a Generic Hypersonic Vehicle Based on Internal Model control 36

第25届中国控制与决策会议

作者： WANG Ming-shun WANG Tian-qi HU Bing JI Feng College of Information Science and Engineering Northeastern University

ISBN: (纸本)9781467355339

The static decoupling control method is tested on a dual-chamber electric furnace. Experiments have shown that the method enables dual-chamber body electric furnace-the coupling system operate well, and also reduces the changes of the controlled parameter s amplitude to a certain extent. Typically, for multivariable control system, it can basically meet the specific requirements in the project after achieving these indicator requirements.

关键词： decoupling control Dual-chamber body electric furnace control theory Computer control

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Analytical Decoupling Control of a Generic Hypersonic Vehicl...