引用本文:李军 CHEN Shanguo.[en_title][J].Journal of Chongqing University (English Edition),2002,1(2):24~27
.Computer simulation of active suspension based on the full-vehicle model[J].Journal of Chongqing University (English Edition),2002,1(2):24~27
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Computer simulation of active suspension based on the full-vehicle model
李军 CHEN Shanguo
Author NameAffiliation
摘要:
The current method to solve the problem of active suspension control for a vehicle is often dealt with a quarter-car or half-car model.But it is not enough to use this kind of model for practical applications.In this paper,based on considering the influe
关键词:  汽车 主动悬挂 整车模型 计算机仿真 线性二次曲线控制 功率谱密度
DOI:
分类号:U463.33 TP39
基金项目:
Computer simulation of active suspension based on the full-vehicle model
LI Jun1,2,CHEN Shanguo2 1College of Mechanical Engineering,Chongqing University,Chongqing 400044,P.R. China 2College of Mechanical Engineering,Chongqing Technology and Business University,Chongqing 400033,P.R. China
Abstract:
Abstract: The current method to solve the problem of active suspension control for a vehicle is often dealt with a quarter-car or half-car model. But it is not enough to use this kind of model for practical applications. In this paper, based on considering the influence of factors such as, seat and passengers, a MDOF(multi-degree-of-freedom) model describing the vehicle motion is set up. The MODF model, which is 8DOF of four independent suspensions and four wheel tracks, is more applicable by comparison of its analysis result with some conventional vehicle models. Therefore, it is more suitable to use the 8DOF full-car model than a conventional 4DOF half-car model in the active control design for car vibration. Based on the derived 8DOF model, a controller is designed by using LQ (linear quadratic ) control theory, and the appropriate control scheme is selected by testing various performance indexes. Computer simulation is carried out for a passenger car running on a road with step disturbance and random road disturbance expressed by Power Spectral Density (PSD). Vibrations corresponding to ride comfort are derived under the foregoing road disturbances. The response results for uncontrolled and controlled system are compared. The response of vehicle vibration is greatly suppressed and quickly damped, which testifies the effect of the active suspension. The results achieved for various controllers are compared to investigate the influence of different control schemes on the control effect.
Key words:  Key Word: active suspension,LQ control,8DOF model
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