视频卫星凝视姿态跟踪有限时间控制仿真研究

Simulation of Staring Imaging Attitude Tracking Finite Time Control of TV Satellite

针对视频卫星对地凝视成像的姿态控制问题,提出了一种基于双框架控制力矩陀螺(DGCMG)和反作用飞轮的卫星对地凝视姿态跟踪有限时间控制方法。推导了凝视成像时卫星的期望姿态和期望角速度;建立了视频卫星姿态跟踪数学模型;基于非线性系统齐次性方法设计了一种有限时间控制算法;进行了数值仿真和半实物仿真。仿真结果表明,该方法能够实现视频卫星对凝视姿态跟踪,可使闭环系统状态有限时间收敛并具有很好的鲁棒性。

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.