基于反步法的挠性航天器姿态镇定

doi:CNKI:11-1929/V.20110412.1530.004

Abstract

Abstract: By utilizing the backstepping control technique, a control scheme with a flexible modal observer is deduced to stabilize a class of flexible spacecraft. First, a flexible modal observer is developed to recover the flexible variables and their rates. Second, regarding the angular velocities as the virtual controllers, virtual angular velocities are presented to stabilize the subsystem composed of a kinematic model and the flexible variables. Finally, based on the backstepping control technique, a nonlinear attitude controller is designed to force the angular velocities to track the virtual angular velocities, such that the stabilization of a flexible spacecraft is achieved. In the absence of external disturbances, the proposed controller can asymptotically stabilize a flexible spacecraft attitude control system. In the presence of bounded disturbances, the states will be stabilized to an adjustable region including the origin in finite time, the bounds of which are determined by controller parameters. Numerical simulation results show the effectiveness of the proposed method.

Key words: flexible spacecraft, attitude stabilization, backstepping control, modal observer, disturbance analysis

CLC Number:

V448.2

WANG Xiangyu, DING Shihong, LI Shihua. Stabilization of Flexible Spacecraft Attitude Based on Backstepping Control[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(8): 1512-1523.

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Stabilization of Flexible Spacecraft Attitude Based on Backstepping Control

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