Modeless control for an unmanned surface vehicle under the dynamic event-triggered mechanism
Focused on the trajectory tracking control for unmanned surface vehicles subject to complex ocean envi-ronments,a modeless controller is designed by combining the sliding mode variable-structure control with the adap-tive control.A dynamic event-triggering mechanism is proposed based on this controller.The Lyapunov stability a-nalysis proves that all error signals of the closed-loop system can converge to a compact set while excluding the Zeno behavior.The numerical simulation shows that the controller demonstrates satisfactory control performance in the scenarios wherein the model parameters remain unknown,and it can effectively lower the actuator and energy con-sumption,thus providing an effective basis for the actual application of the trajectory control of unmanned surface vehicles.