Decentralized adaptive sliding mode control for beam synchronization of tethered InSAR system

作者：Zhang, Jinxiu; Zhang, Zhigang; Wu, Baolin^*

来源：Acta Astronautica, 2016, 127: 57-66.

DOI：10.1016/j.actaastro.2016.05.024

• Tethered InSAR system
• Beam synchronization
• Total zero Doppler steering
• Decentralized adaptive control

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.

• 出版日期2016-10
• 单位哈尔滨工业大学