Scheduling-based Dynamic Triggered Sliding Mode Control of Networked Control Systems

For networked control systems with limited bandwidth, this paper explores a scheduling-based dynamic event-triggered sliding mode control method. With the system state sampled data, triggered data error, and an integral sliding mode surface, a dynamic event-triggered mechanism is established in the sensor-to-controller channel, enhancing network resource utilization. Utilizing the triggered state information and historical data, a historical-weighed-try-once-discard (HWTOD) protocol is designed to schedule the node information, reducing both data collision and unnecessary transmission. Finally, based on the triggered state, scheduled state, and the integral sliding mode surface in the dynamic event trigger, a sliding mode controller is designed to ensure the system stability while mitigating chattering. The asymptotic stability of the closed-loop system and reachability of the sliding surface are proved via Lyapunov function. Simulation results confirm that this approach can asymptotically stabilize the networked control system, conserve network resources and reduce unnecessary transmission and collision.