Robust event-triggered H∞ controller design for vehicle active suspension systems

In this paper, we investigate the event-triggered H-infinity controller synthesis issue for vehicle suspension systems with linear fractional uncertainties. An active suspension model of quarter-car is represented by the state-space form. In order to obtain a resouce-aware state feedback controller for the system, we propose an event-triggerd communication mechanism to check which measurements should be delivered to the controller for updating the control input. Together with the proposed event threshold condition, a piecewise contionuous bounded function is introduced to model the intermittent updating intervals.Employing the Lyapunov funtional method, we present a stability criterion for the controlled event-triggerd active suspension system under parameter uncertainties and some physical constraints. Then, a design method for the event-triggered controller gain is obtained by utilizing some matrix transformations. An example is finally employed to illustrate the validness of the proposed method.