Original scientific paper

https://doi.org/10.1080/00051144.2021.1935610

H∞ optimal control of vehicle active suspension systems in two time scales

Fu Fu ; College of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, Zhengzhou, People’s Republic of China
Xiao-Yang Dong ; College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, People’s Republic of China

Abstract

In this paper, a novel H∞ control method in two time scales is proposed for active suspension systems. Two time scales are considered based on the natural time scale separation existing in the active suspension systems, i.e. the sprung mass part corresponding to the fast dynamics and the unsprung mass part corresponding to the slow dynamics. Singular perturbation theory is used to establish a dual time scale active suspension model and design a H∞ controller. Compared with the commonly used H∞ controller, the time-sharing dynamic characteristics make the proposed two time scales H∞ controller have better dynamic response when encountering dynamic road input, so as to better meet the control performance requirements of active suspension. The effectiveness of the proposed H∞ control method in two time scales is illustrated through co-simulations.

Keywords

H∞ control; two time scales; active suspension; optimal control

Hrčak ID:

269841

URI

https://hrcak.srce.hr/269841

Publication date:

4.6.2021.

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