关键词: 视频卫星, 凝视成像, 有限时间控制, 单轴气浮台

Abstract: For the attitude tracking control problem of TV satellite staring imaging, a attitude tracking finite time control method driven by Double-Gimbaled Control Moment Gyroscopes (DGCMG) and reaction flywheels was proposed. The expected attitude angles and attitude angular velocity of satellite was computed when it stared imaging. A TV satellite attitude tracking model was described with quaternion. A finite time controller based on homogeneous method of nonlinear system was proposed. The numerical simulation and hardware-in-loop simulation results show that the method can achieve the attitude tracking control of staring imaging of TV satellite, guarantee the closed-loop system converge to the equilibrum point in finite time and are robust against uncertainties and disturbances.

Key words: TV satellite, staring imaging, finite time control, single axis air-bearing platform