Adaptive fuzzy PID electro-hydraulic proportional position control based on AMESim-Simulink

LI Yan-min1, LIU Xi-shan2, WANG Zhen1, ZHUANG Tian-yu1
(1.School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China;
2.Henan Province Industrial Technology Research Institute of Resources and Materials,
Zhengzhou University, Zhengzhou 450001, China)

Abstract: Aiming at the problem of dynamic loading characteristics of the compression shear tester horizontal shear system under the influence of super large flow rate and output force, the step response of the horizontal shear system, the loading accuracy of the sinusoidal actual working condition and the xpF loading characteristic were studied. The shear principle of the equipment was analyzed, the electrohydraulic proportional position control system was taken as the research object, six electrohydraulic proportional valves were used for parallel control. The hydraulic schematic of the horizontal shear system subcircuit was drawn, the adaptive fuzzy PID control was introduced, the fuzzy controller was designed, and the horizontal shear model was optimized and simulated with AMESim and Simulink. The results indicate that comparing with ordinary PID, the adaptive fuzzy PID control can achieve better robustness, the system can reach steady state in a shorter time and smaller overshoot, the actual displacement tracks the sinusoidal expected signal, the error is -2.6%~1.9%, which is within ±5% of the allowable error range.

Key words: compression shear tester; hydraulic control system; AMESim; Simulink; adaptive fuzzy PID