利用特征结构指定隔离卫星滚动偏航陀螺故障的新方法

A New Fault Isolation Approach for the Roll and Yaw Gyroscopes

对于卫星滚动轴陀螺和偏航轴陀螺的故障隔离,给出了一种新的方法。利用姿态运动学的关系建立关联卫星各个敏感器输出信息的系统,对于这个系统设计隔离观测器,使不同陀螺的故障在残差空间的不同方向定向,达到故障隔离的目的。文中给出了隔离观测器存在的一个充分条件和求解步骤。最后的数学仿真表明这种方法能够有效地隔离滚动陀螺和偏航陀螺故障。

In this paper,a new approach for the FDI of roll and yaw gyroscopes is presented.The measurements of the sensors are correlative via satellite kinematics equation,so a virtual system is constructed through this correlation.Then a special isolation observer is designed which ensures that the fault of both gyroscopes fixes to different directions in the residual space,and therefore isolates the fault.The paper also provides a sufficient condition of the existence of the observer and a detailed algorithm to ge...