具有输入饱和及多不确定性的挠性卫星姿态控制

Attitude Control for Flexible Satellite with Input Saturation and Multi-uncertainties

研究了存在控制输入饱和约束、内外部干扰及质量特性参数不确定性的挠性卫星姿态鲁棒控制器设计问题.通过近似线性化结合等价坐标变换的方法得到了挠性卫星系统相应的状态空间描述,并以此为基础,采用理论分析结合数值仿真的手段设计出满足控制输入饱和约束并适应两类不确定性的姿态鲁棒控制方法.仿真结果表明,该方法得到的控制器具有较强鲁棒性,能很好地抑制内外部干扰并适应较大范围的质量特性参数不确定性.

The robust attitude controller designed for flexible satellite with control input saturation constraint and internal and external disturbances and mass characteristic parameter uncertainty is studied. The corresponding state space equation of flexible satellite model can be obtained through equivalent coordinate transformation and approximate linearization method, and on this basis, the ro- bust ＂attitude control method which satisfy the control input saturation constraint and the two kinds of uncertainties can be designed by using theoretical analysis and numerical simulation. The simulation results show that the controller which is got by the method has strong robustness arid can adapt to biggish mass characteristic parameter uncertainty and suppress both internal and external disturb ances well.