双通道受周期性DoS攻击下的NCSs事件触发控制

Event-triggered control for networked control systems with two channels attacked by periodic denial-of-service

本文针对双通道(传感器-控制器通道、控制器-执行器通道)受到已知周期性拒绝服务(DoS)攻击的网络控制系统,设计了一种基于观测器的具有弹性事件触发策略的控制器。使用切换系统的方法,将受到周期性DoS攻击的网络控制系统分为DoS攻击休眠子系统和DoS攻击活跃子系统,在周期性DoS攻击活跃期,采用保持输入补偿策略以避免DoS攻击对传输数据的影响。通过引入两个辅助函数得到闭环增广系统,基于系统全局指数稳定的充分条件,通过给定的周期性DoS攻击参数,设计系统的状态观测器和事件触发控制器。仿真结果表明,所设计的控制器在保证系统稳定的同时,还能减少不必要的数据传输。

Aimed at the network control systems with two channels(sensor-controller channel and controller-actuator channel)attacked by periodic denial-of-service(DoS),a kind of controller with resilient event-triggered strategy based on observer was designed.The network control systems attacked by periodic Dos were divided into DoS attack dormant subsystem and DoS attack active subsystem via system switching method.During the active periods of DoS attack,a strategy of maintaining input compensation was adopted in order to avoid the impact of DoS attack on the transmitted data.The closed-loop augmented system was obtained by introducing two auxiliary functions,and on the basis of the sufficient conditions for global exponential stabilization of the systems,the state observer and event-triggered controller in the systems were designed with the given periodic DoS attack parameters.The simulation results show that the proposed controller can reduce the unnecessary data transmission and ensure the stabilization of the systems.