Disturbance Observer Based Optimal Controller Design for Active Suspension Systems

摘要

This paper is concerned with the design of disturbance observer based optimal controller for an active control problem of a vehicle suspension system with saturated actuators against magnitude bounded disturbances. A quarter car model presented to analyze performance of proposed controller against bump road profile. Proposed control scheme composed of a disturbance observer and a control law with a state feedback and disturbance feedforward. Gain matrices belong to disturbance observer and the control law are simultaneously computed to minimize L_2 gain of the closed loop system from disturbances to performance outputs by Linear Matrix Inequalities (LMIs) constraints. Finally, numerical simulations are carried out to demonstrate performance of proposed controller.