Dynamic Event-Triggered Fault-Tolerant Control of Vehicle Active Suspension Systems

This paper is concerned with the event-triggered control problem of vehicle active suspension systems subject to uncertain actuator faults. Firstly, networked modeling of the vehicle suspension control system is presented and a dynamic event-triggered communication mechanism is developed to reduce some unnecessary data transmissions between networked sensor and controller, thus enabling efficient usage of the limited communication resources for the in-vehicle network. Different from most existing event-triggered mechanisms, the threshold parameter of the proposed triggering condition is adaptively regulated in accord with a dynamic rule. Secondly, by Lyapunov functional method, a co-design criterion of the desired event-triggering parameter and H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</sub> controller gain is derived so as to guarantee the asymptotic stability of the resulting closed-loop system and preserve several performance requirements of the suspension system, including ride comfort, road holding and suspension deflection/stroke limitation. Finally, simulation results are provided to show the effectiveness of the proposed method.