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Research on disturbance rejection control strategy of vehicle drive axle loading test bench

Yu Hui, Wang Hui, Li Nanqi, Zhao Guochao

Journal of Theoretical and Applied Mechanics

2022

Vol. 60 nr 2

227--238

Aiming at the problems of parameter disturbance and coupling disturbance in a vehicle drive axle loading test-bed, this paper used the adaptive backstepping sliding mode control (ABSMC) strategy to design the controller for the speed and torque system. The effectiveness of the controller has been verified by simulation and an experiment. The results show that the equivalent moment of inertia is increased by 5 times, and the step response overshoot of the speed system is 4.1%. By adding a random disturbance, the sinusoidal tracking errors of the speed and torque systems are 0.05 r/min and 0.09Nm, respectively.

Dynamic characteristics study on the two-stage safety valve used on hydraulic support under impact loading

Zhao Guochao, Wang Hui, Song Yuning, Zhang Changshuai

Journal of Theoretical and Applied Mechanics

2020

Vol. 58 nr 3

623--635

A two-stage linkage safety valve for hydraulic support is presented. Considering the hydraulic support is impacted, dynamic simulation of the column circuit with the two-stage safety valve subject impact loading was carried out, and the dynamic characteristics of the two- -stage safety valve with different impact forms were studied. A rapid impact loading test rig was built to test the two-stage safety valve sample under impact loading. Simulation and experimental results indicate that the two-stage safety valve has high sensitivity and good unloading performance, it can realize fast and large flow unloading of the hydraulic support under different impact forms and pressures.