Delayed H∞ Switched Control for Uncertain Nonlinear Active Suspension Systems
2023 15th IEEE International Conference on Industry Applications (INDUSCON)(2023)
Abstract
One of the most important topics in the automotive industry is the design of a suspension system that ensures better ride comfort and handling control. This paper presents design conditions for a H
∞
controller that mitigates perturbations in dynamic response, and considering a time delay in the actuator. The nonlinear suspension system will be modeled as a Takagi-Sugeno (T-S) fuzzy system, and in order to obtain less conservatism in the design conditions, a Lyapunov-Krasovskii functional that depends of the membership functions (MFs) will be considered. The initial results present the design conditions of a parallel distributed compensation (PDC) controller. Therefore, the sprung and unsprung masses will be considered as uncertain nonlinear premise variables, which are not available for feedback, and a switched controller is proposed to deal with this problem. Simulation results are presented, demonstrating the effectiveness and improvement of the proposed strategy.
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Key words
Active suspension system,Parallel distributed compensation (PDC),Memebership function dependent Lyapunov-Krasovskii functional
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