Author: Leite Valter
Publisher: Taylor & Francis Ltd
ISSN: 0042-3114
Source: Vehicle System Dynamics, Vol.43, Iss.8, 2005-08, pp. : 561-579
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
This paper addresses the problem of robust control design for an active suspension quarter-car model by means of state feedback gains. Specifically, the design of controllers that assure robust pole location of the closed-loop system inside a circular region on the left-hand side of complex plane is investigated. Three sufficient conditions for the existence of a robust stabilizing state feedback gain are presented as linear matrix inequalities: (i) the quadratic stability based gain; (ii) a recently published condition that uses an augmented space and has been here modified to cope with the pole location specification; (iii) a condition that uses an extended number of equations and yields a parameter-dependent state feedback gain. Unlike other parameter-dependent strategies, neither extensive gridding nor approximations are needed. In the suspension model, the sprung mass, the damper coefficient and the spring constant are considered as uncertain parameters belonging to a known interval (polytope type uncertainty). It is shown that the parameter-dependent gain proposed allows one to impose the closed-loop system pole locations that in some situations cannot be obtained with constant feedback gains.
Related content
Mechanical and Control Design of a Variable Geometry Active Suspension System
Vehicle System Dynamics, Vol. 32, Iss. 2-3, 1999-08 ,pp. :
Observer Design for Semi-Active Suspension Control
Vehicle System Dynamics, Vol. 32, Iss. 2-3, 1999-08 ,pp. :