CAJ | 학술논문

针对卫星在轨运行出现执行机构故障问题，提出了一种基于观测器的卫星姿控系统鲁棒故障重构方法。首先，考虑卫星出现空间干扰、测量干扰以及噪声，建立欧拉离散时间卫星姿控系统模型。其次，设计一种离散比例积分观测器（proportional integral observer，PIO）实现卫星姿态角和姿态角速度估计，并利用前一时刻的故障重构值和输出估计误差迭代更新当前故障重构信息。然后，采用干扰解耦思想设计离散 PIO 解耦部分空间干扰，并利用 H ∞技术抑制剩余干扰和测量噪声的影响。另外，利用线性矩阵不等式工具箱求解了部分观测器增益矩阵。最后，仿真结果验证了所提故障重构方法的有效性。
침대위성재궤운행출현집행궤구고장문제，제출료일충기우관측기적위성자공계통로봉고장중구방법。수선，고필위성출현공간간우、측량간우이급조성，건립구랍리산시간위성자공계통모형。기차，설계일충리산비례적분관측기（proportional integral observer，PIO）실현위성자태각화자태각속도고계，병이용전일시각적고장중구치화수출고계오차질대경신당전고장중구신식。연후，채용간우해우사상설계리산 PIO 해우부분공간간우，병이용 H ∞기술억제잉여간우화측량조성적영향。령외，이용선성구진불등식공구상구해료부분관측기증익구진。최후，방진결과험증료소제고장중구방법적유효성。
The problem of observer-based robust actuator fault reconstruction in the satellite attitude con-trol system (ACS)is investigated.Firstly,a discrete-time model for satellite ACS subject to space disturbance torques and measurement noises is established.Secondly,a discrete proportional integral observer (PIO)is con-structed to simultaneously estimate satellite attitude angles and attitude angular velocities,and the current fault reconstruction signal is further updated by its previous information and output estimation error.Thirdly,based on the disturbance-decoupling methodology,the proposed PIO is partially decoupled from space disturbance torques,and then the PIO is designed to attenuate the influence of the remaining part of space disturbance torques and measurement noises via H ∞ technologies.In addition,observer gain matrices are conveniently com-puted using standard linear matrix inequality tools.Finally,simulation results validate the effectiveness of the proposed PIO-based fault reconstruction approach.