ROBUST DESIGN OF ACTIVE SUSPENSION SYSTEM

In this paper, the authors deal with some new control design methods o f the control system used in active wheel suspension. Applicability of H-infinity control in case of the active suspension system is examine d still using the familiar quarter-car model. The robust control probl em is solved in case of direct state-feedback H-infinity and in the pr esence of structured (parametric) uncertainties solving the RLQR desig n task. The authors solve the joint H-infinity/RLQR problem proving th e trade-off between the external disturbance rejection (road irregular ities) and the internal disturbance attenuation arising from the param etric uncertainties.