卫星精确定向的模型匹配鲁棒控制器设计

摘要

The dynamic model for attitude control of a satellite with circle orbits is established and linearized.The influence of the sensor' s noise on the attitude angle and attitude angular velocity is analyzed.Furthermore, the reference model is constructed.Considering the measurement errors of the noise and parameter uncertainty, the robust model matching H∞ controller is designed using weighting functions method.Its solution is obtained by the D-K iteration.The simulation indicates that the satellite can track the reference signal and the robust H∞controller system has a good performance.%建立圆轨道卫星的姿态动力学模型,并进行线性化,分析感器噪声对卫星姿态角和姿态角速度的影响,并构造参考模型,考虑到传感器测量误差和参数的不确定,采用加权函数法设计模型匹配鲁棒H∞控制器,并通过DK迭代求解,仿真证明卫星能够跟踪参考信号,鲁棒H∞控制系统也具备了良好的性能.