Mixed H_2/H_∞ with Pole-Placement Control Design Outline for Active Suspension Systems

摘要

This paper consider the control of active automotive suspensions applying Mixed (H_2/H_∞) state-space optimization techniques. It is well known that the ride comfort is improved by reducing vehicle body acceleration generated by road disturbance. In order to study this phenomenon, Two Degrees of Freedom (DOF) in state space vehicle model was built in. However, the H∞ control method attenuates the agitation effect on the output while H_2 is employed to improve the input of the controller. Linear Matrix Inequality (LMI) technique is employed to calculate the dynamic controller parameters. The outcome of the simulation revealed that ride comfort for the vehicle upgraded adequately by applying mixed H_2/H_∞ Control method for active suspension system, and also the mixed H_2/H_∞ Control method was more effective than the H_∞ Control method.