Dynamic Output-Feedback H-infinity Control for Active Half-vehicle Suspension Systems with Time-varying Input Delay

Abstract

This paper addresses the new output-feedback H-infinity control problem for active half-vehicle suspension systems with time-varying input delay. By introducing multi-objective synthesis, a new dynamic output-feedback H-infinity controller is designed such that the closed-loop suspension system is asymptotically stable with guaranteed robust performance in the H-infinity sense. The proposed controller is formulated in terms of linear matrix inequality (LMI) based on the auxiliary function-based integral inequality method and the reciprocally convex approach. A new delay-dependent sufficient condition for the desired controller offers a wider range of control input delay. Numerical examples are provided to validate the effectiveness of the proposed design method.