An event trigger-based prescribed-time control algorithm is proposed for trajectory tracking of a spacecraft under communication constraints.First,to endow the spacecraft with rapidity under different task scenarios,a pre-scribed-time trajectory-tracking control algorithm is designed,which finally achieves the prescribed-time convergence of the trajectory-tracking control system by combining the backstepping control theory and dynamic gain of the pre-scribed time.Second,as a typical networked control system,the spacecraft may be limited by its own communication capability in the process of task implementation,which will lead to communication congestion,time delay,packet loss,and so on.Therefore,an event-trigger algorithm is proposed based on the dynamic parameter.While assuring system control precision,the algorithm can avoid unnecessary communication consumption between the control center and the spacecraft itself to a certain extent.Compared with the traditional static event-trigger algorithm,the proposed dynamic parameter-based event-trigger algorithm has the advantage of reducing the communication frequency.Finally,the effect-iveness of the proposed control algorithm is verified by theoretical analysis and simulation experiments.
关键词
通信受限/轨迹跟踪/事件触发/预设时间/反步控制/动态增益/网络化控制系统/动态参数
Key words
limited communication/trajectory tracking/event trigger/prescribed time/backstepping control/dynamic gain/networked control system/dynamic parameter
维普
万方数据