Research on Inner and Outer Loop Control of Active Suspension with Linear Motor

doi:10.16182/j.issn1004731x.joss.201807023

Abstract

Abstract: In order to improve the dynamic performance of active suspension with linear motor, the control strategy of LQR control and quasi proportional resonance control was designed. A two-degree-of-freedom vehicle model with active suspension and a linear motor mathematical model were established, and the correctness of the linear motor model was verified by experiments. The influence of the inner loop controller parameters on the controller performance and the response characteristics of the linear motor were analyzed by Matlab/simulink, and the parameters of the inner and outer loop controller were determined. The PID control and quasi proportional resonant control were compared and analyzed. The results showed that the sprung mass acceleration of the active suspension with LQR and quasi proportional resonance inner and outer loop control drops by 27.49%, the dynamic deflection of the suspension drops by 24.26%, and the dynamic load of the tire drops by 17.22%.

Key words: linear motor, active suspension, inner and outer loop control, LQR control, quasi proportional resonance control

CLC Number:

TP391.9

Kou Farong, Fang Tao, Ren Quan, Chen Long. Research on Inner and Outer Loop Control of Active Suspension with Linear Motor[J]. Journal of System Simulation, 2018, 30(7): 2615-2621.

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