Abstract Beam synchronization problem of tethered interferometric synthetic aperture radar (InSAR) is addressed in this paper. Two antennas of the system are carried by separate satellites connected through a tether to obtain a preferable baseline. A Total Zero Doppler Steering (TZDS) is implemented to mother-satellite to cancel the residual Doppler. Subsequently attitude reference trajectories for the two satellites are generated to achieve the beam synchronization and TZDS. Thereafter, a decentralized adaptive sliding mode control law is proposed to track these reference trajectories in the presence of model uncertainties and external disturbances. Finally, the stability of closed-loop system is proved by the corollary of Barbalat's Lemma. Simulation results show the proposed control law is effective to achieve beam synchronization of the system.
Highlights Beam synchronization problem of tethered InSAR is studied. A total zero Doppler steering is performed to mother-satellite. The model uncertainties and external disturbances are considered. A decentralized adaptive control law is proposed. The controller is modified to avoid the chattering problem.
Decentralized adaptive sliding mode control for beam synchronization of tethered InSAR system
Acta Astronautica ; 127 ; 57-66
2016-05-20
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Decentralized adaptive sliding mode control for beam synchronization of tethered InSAR system
Online Contents | 2016
|Adaptive sliding mode control of tethered satellite deployment with input limitation
Online Contents | 2016
|Decentralized sliding-mode control for spacecraft attitude synchronization under actuator failures
Online Contents | 2014
|