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Brake pressure control of wet sintered metal friction material test bench
Published:2024-12-24 author:WU Yunzhi, GU Feng, ZAN Ao, et al. Browse: 12 Check PDF documents
Brake pressure control of wet sintered metal friction material test bench


WU Yunzhi1, GU Feng1, ZAN Ao1, YANG Jiandong1, JING Xiurun2

(1.School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China; 2.School of 
Engineering and Technology, Hubei University of Technology, Wuhan 430068, China)


Abstract:  The working environment of the wet sintered metal friction material test bench is complex, and accurate pressure control is needed during braking test. Aiming at the problems of low control accuracy and poor anti-interference ability of the hydraulic system of the test bench, a fuzzy PID control algorithm based on the improved particle swarm optimization (PSO)——improved PSOFuzzyPID control method was proposed. Firstly, the system structure of the test bench was introduced, the basic principles of dynamic and static tests of the test bench were analyzed, as well as the principle of pressure control of the hydraulic system, and the mathematical model of the hydraulic control system of the test bench was established in MATLAB/Simulink based on the above analysis. Then, the control effect of traditional PID control, fuzzy PID control and fuzzy PID control based on improved PSO was compared under the step input and interference signal, and the feasibility of the control method was verified. Finally, taking the copper-based friction plate as the test piece, the bench test of the control method was carried out on the wet sintered metal friction material performance test bench of a company, it further verified the performance of the improved PSO-FuzzyPID control method. The research results show that comparing with the traditional PID and fuzzy PID control methods, the method reduces the overshoot by 10.3% and 2.6%, the response time by 0.07 s and 0.26 s, and the steady-state error by 0.03 MPa and 0.02 MPa. The above results verify that the method effectively improves the control precision of the hydraulic system of the test bench, and has strong anti-interference ability, it can meet the actual control requirements of the test bench.

Key words: improved particle swarm optimization (PSO); fuzzy PID control; wet sintered metal; friction material test bench; control strategy; improved particle swarm optimization fuzzy PID（PSO-FuzzyPID） control method
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