Fixed-order H∞ control of an electric power steering system Online publication date: Thu, 07-Apr-2022
by Ai Ping Pang; Hui Zhu; Hong Bo Zhou; Tao Qin; Jing Yang; Dao Yin Long
International Journal of Modelling, Identification and Control (IJMIC), Vol. 37, No. 3/4, 2021
Abstract: The electric power steering (EPS) system has a very small phase margin and it is particularly easy to start oscillation. Therefore, a stable controller is needed to improve the stability margin. In addition, the gain of the torsional moment diagram of the EPS system in different situations exhibits parameter perturbation, which requires the control design to have certain robustness performance and consider all the stability margin, robust performance of the system and the bandwidth requirement of the system. In this paper, the fixed-order H∞ control design is adopted to form an H∞ optimisation matrix with multi-dimensional performance output and a third-order fixed-order H∞ controller is designed. The controller has good robustness performance, high stability margin, and relatively low order compared to the conventional H∞ controller design, which is convenient for practical applications.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Modelling, Identification and Control (IJMIC):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook