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

被引：6
作者：
Zhang, Jinxiu [1 ]
Zhang, Zhigang [1 ]
Wu, Baolin [1 ]
机构：
[1] Harbin Inst Technol, Res Ctr Satellite Technol, Harbin 150080, Peoples R China
来源：
ACTA ASTRONAUTICA | 2016年 / 127卷
基金：
中国国家自然科学基金;
关键词：
Tethered InSAR system; Beam synchronization; Total zero Doppler steering; Decentralized adaptive control; ATTITUDE-CONTROL; TANDEM-X; SAR; INTERFEROMETER; DYNAMICS;
D O I：
10.1016/j.actaastro.2016.05.024
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
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. (C) 2016 IAA. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：57 / 66
页数：10
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