Event-Triggered Control For Dynamic Systems With Communication Constraints

With the rapid development of communication,control and computer technology,communication networks free information interactions from geographical constraints.However,the communication capability of the channel is limited by various constraints,bringing new challenges to the analysis and design of the control systems.In order to save channel resources,transmission instants are determined by the event-triggered control in terms of system requirements.This thesis studies the event-triggered control for master-slave chaotic systems and networked control systems based on quantization,network-induced delay and packet dropout.Firstly,three event-triggered control strategies are separately designed for the out-put based master-slave chaotic systems within the framework of static coder,binary coder and mixed coder structures.Both transmission error and transmission bit rate are analyzed for coders with the event-triggered control strategies.It is shown that the proposed event-triggered control strategies avoid the existence of Zeno behavior for the master-slave chaotic systems.Secondly,for the output error based master-slave chaotic systems,the dynamic quantizer parameter based event-triggered control strategy is proposed under the condi-tion that the sensor can obtain the synchronization output error in real time.When the sensor cannot obtain the synchronization output error in real time and one-step packet dropout is taken into account,the active quantizer and packet dropout based triggered control strategy is designed to obtain similar performance compared with the one with-out packet dropout.Thirdly,two event-triggered control strategies based on the quantizer parameters are separately suggested for both plant output side and the controller output side to stabilize the networked control systems.Moreover,the parameter updating schemes are designed for the output quantizer and the input quantizer.It is shown that both the event triggering strategies and the parameter updating schemes are fit for stabilizing the networked control system with lower controller gain.In the sequel,for the condition that delay is neglected and delay is involved,the reference input based triggered control strategy and reference input and hysteresis quan-tizer based triggered control strategy are put forward.Moreover,both finite-gain L₂sta-bility and input feed-forward output feedback passivity are analyzed for the networked control systems.Finally,the finite-gain L₂stability and input feed-forward output feedback pas-sivity are analyzed for networked control systems under quantization,network-induced delay and packet dropout.Based on the reference input and the hysteresis quantizer,an active event-triggered control strategy is designed to deal with the unpredictability of the packet dropout.Moreover,negative influence due to packet dropout is actively compensated with less information transmission times.