Fractional order PID control in an electric variable load loading system

被引：0
作者：
Liu F. [1 ]
Wang H. [1 ]
机构：
[1] Hebei Provincial Key Laboratory of Industrial Computer Control Engineering, Yanshan University, Qinhuangdao
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2023年 / 27卷 / 08期
关键词：
approximation; electric variable load loading systems; fractional order PID; loading pressure; output waveform; particle swarm optimization;
D O I：
10.15938/j.emc.2023.08.010
中图分类号：
学科分类号：
摘要：
Aiming at the problems of the strong coupling in the electric loading system, the surplus force interference during loading, and the highly nonlinear and time-varying inside the motor, to improve the dynamic performance and control effect of the electric loading system, the fractional order PID controller is used in electric variable load loading system. The controller has two more adjustable parameters than the conventional PID, and have more flexible control of controlled objects. The Oustaloup approximation method was used to approximate the fractional order operator and the parameters of the fractional order PID controller were rectified and optimised using a particle swarm optimisation algorithm with improved inertia weights. Simulation of an electric variable load loading system with selected output waveforms for different loading pressures and loading tests on an electric variable load friction and wear test rig were conducted. Plot of the tracking curve and error curve of the friction force, coefficient of friction and loading pressure during loading were derived from experimental data, and then compared with conventional PID. The experimental results show that the fractional order PID controller is more resistant to disturbances, and has high tracking accuracy and good control effects. © 2023 Editorial Department of Electric Machines and Control. All rights reserved.
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页码：91 / 99
页数：8
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