An adaptive LQG control for semi-active suspension systems. (12th May 2004)

• Record Type: Journal Article
• Authors: Sohn, Hyun-Chul; Hong, Kyung-Tae; Hong, Keum-Shik; Yoo, Wan-Suk
• Is Part Of: International journal of vehicle design. Volume 34:Number 4(2004)
• Page Start: 309
• Page End: 326
• Publication Date: 2004-05-12
• Subjects: Macpherson strut suspension -- semi-active suspension -- road variations -- identification -- LQG control; Motor vehicles -- Design and construction -- Periodicals; 629.231
• Languages: English
• ISSNs: 0143-3369

Abstract

In this paper, a road-adaptive LQG control for the semi-active Macpherson strut suspension system of hydraulic type is investigated. A new control-oriented model, which incorporates the rotational motion of the unsprung mass, is introduced. A semi-active suspension controller adapting to road variations is proposed. First, based on the extended least squares estimation algorithm, a LQG controller adapting to the estimated road characteristics is designed. Through the computer simulations, the performance of the proposed semi-active suspension is compared with that of a non-adaptive one. The results show better control performance of the proposed system over the compared one.