4.6 Article

Design of a Modal Controller With Simple Models for an Active Suspension System

期刊

IEEE ACCESS
卷 10, 期 -, 页码 65585-65597

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2022.3184005

关键词

Active suspension control; modal control; 1-DOF vehicle model; linear quadratic regulator; sliding mode control; LQ static output feedback control

资金

  1. National Research Foundation of South Korea (NRF) - Korean Government through the Ministry of Education [2019R1A6A1A03032119]

向作者/读者索取更多资源

This paper presents a method to design a modal controller with simple 1-DOF models for an active suspension system, overcoming the difficulties of implementing full-state feedback controllers with a 7-DOF full-car model. The proposed modal controllers, designed from three 1-DOF models, are shown to be effective in controlling the active suspension system for ride comfort.
This paper presents a method to design a modal controller with simple 1-DOF models for an active suspension system. Full-state feedback controller, especially, linear quadratic regulator (LQR) and H-infinity controller, designed with 7-DOF full-car model is hard to implement in actual vehicles because there are so many state variables and gain elements needed to be precisely measured and finely tuned, respectively. To overcome the problem, it is required to design a simple controller with a smaller number of gain elements and sensor signals. For the purpose, a modal controller is designed from controllers designed with three 1-DOF models describing heave, roll and pitch motions of a sprung mass. With these 1-DOF models, discrete-time LQR and sliding mode control (SMC) are adopted to design three feedback controllers which generate vertical force, roll and pitch moments for controlling the heave, roll and pitch motions of a sprung mass, respectively. In the modal controller, three control inputs are converted into active forces at four corners with input decoupling transformation. The modal controller is a type of static output feedback (SOF) one. By LQ SOF control methodology, the modal controller itself is designed with a heuristic optimization method. A frequency domain analysis and a simulation on vehicle simulation software, CarMaker (R), show that the proposed modal controllers are effective in controlling the active suspension system for ride comfort.

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