Fractional-order control system for vehicle ISD suspension based on the mechatronic inerter

doi:10.3969/j.issn.1674-8484.2022.01.005

Abstract

Abstract:

A quarter suspension dynamic model was established to improve the vibration isolation performances of vehicle suspension with inerter-spring-damper (ISD). A fractional order PID (proportion integration differentiation) control system of suspension was built taking the vehicle riding comfort as the object; Considering the vehicle body acceleration, the suspension working space and the dynamic tire load; Using a multi-objective genetic algorithm to optimize the parameters of both integer order and fractional order control model for the ISD suspension; The dynamic performances were simulated and analyzed in Matlab/Simulink for vehicle ISD suspension. The results show that compared with the traditional passive suspension, the root mean square values of the body acceleration, the suspension dynamic travel and the dynamic tire load of the ISD suspension with integer order control are reduced by 13.9%, 26.2% and 1.5% respectively, and the ISD suspension with fractional order control is reduced by 15.4%, 31.5% and 6.8% respectively. Therefore, the fractional order control system improves the ride comfort and handling stability.

Key words: vehicles, suspensions, mechatronic inerters, inerter-spring-damper (ISD), vibration isolation performances, fractional order control

CLC Number:

TB114.3

HUA Jie, SHEN Yujie, CHEN Long, LIU Yanling, YANG Xiaofeng. Fractional-order control system for vehicle ISD suspension based on the mechatronic inerter[J]. Journal of Automotive Safety and Energy, 2022, 13(1): 63-69.

Figures/Tables 6

References 21

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控制方法	车身加速度
控制方法	均方根值/ (m·s^-2)	优化比/ %	均方根值/ mm	优化比/ %	均方根值/ N	优化比/ %
传统被动悬架	1.309 6	—	13.0	—	900.5	—
整数阶控制ISD悬架	1.127 7	13.9	9.6	26.2	886.8	1.5
分数阶控制ISD悬架	1.107 7	15.4	8.9	31.5	839.4	6.8

控制方法	车身加速度
控制方法	均方根值/ (m·s^-2)	优化比/ %	均方根值/ mm	优化比/ %	均方根值/ N	优化比/ %
传统被动悬架	1.309 6	—	13.0	—	900.5	—
整数阶控制ISD悬架	1.127 7	13.9	9.6	26.2	886.8	1.5
分数阶控制ISD悬架	1.107 7	15.4	8.9	31.5	839.4	6.8