The significant characteristics of space non-cooperative targets include the uncertainties of dynamic parameters and behaviors.Herein,a hybrid proximity control strategy adapted to the behavior uncertainty of a non-co...The significant characteristics of space non-cooperative targets include the uncertainties of dynamic parameters and behaviors.Herein,a hybrid proximity control strategy adapted to the behavior uncertainty of a non-cooperative target is presented.First,the relative motion dynamics between the chaser and target is established in the geocentric inertial coordinate system and transcribed based on the chaser spacecraft body coordinate system.Subsequently,to facilitate proximity control under uncertain conditions,an extended state observer is designed to estimate and compensate for the total uncertainty in the relative motion dynamics.Finally,an event-triggered sliding mode control law is designed to track the target with behavior uncertainty and realize synchronization.Numerical simulations demonstrate the effectiveness of the proposed proximity control strategy for both tumbling and maneuvering targets.展开更多
基金This study was supported by the Qian Xuesen Laboratory of Space Technology,CAST(Grant No.GZZKFJJ2020001)the Open Funding of the National Defense Science and Technology Key Laboratory of Space Intelligent Control Technology(Grant No.6142208200304)the Postdoctoral Research Foundation of Sichuan University.
文摘The significant characteristics of space non-cooperative targets include the uncertainties of dynamic parameters and behaviors.Herein,a hybrid proximity control strategy adapted to the behavior uncertainty of a non-cooperative target is presented.First,the relative motion dynamics between the chaser and target is established in the geocentric inertial coordinate system and transcribed based on the chaser spacecraft body coordinate system.Subsequently,to facilitate proximity control under uncertain conditions,an extended state observer is designed to estimate and compensate for the total uncertainty in the relative motion dynamics.Finally,an event-triggered sliding mode control law is designed to track the target with behavior uncertainty and realize synchronization.Numerical simulations demonstrate the effectiveness of the proposed proximity control strategy for both tumbling and maneuvering targets.
