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针对卫星姿态控制系统中速率陀螺噪声增大、饱和、漂移等常见故障,直接利用各敏感器的输出数据,应用双统计判据法进行陀螺的故障检测与诊断。该方法利用测量数据之间的相关性将其分为主元子空间和残差子空间,在各空间中建立统计量来检测故障,通过双统计量的贡献图识别出故障传感器。仿真结果表明:双统计判据法对卫星姿态控制系统中的速率陀螺具有良好的故障检测与诊断能力。
Aiming at the common faults such as the increase of the rate gyroscope noise, saturation and drift in the satellite attitude control system, the output data of each sensor is directly used to detect and diagnose the gyroscope faults by using the double statistic criterion method. The method uses the correlation between measurement data to divide it into principal component subspaces and residual subspaces, establishes statistics in each space to detect faults, and identifies the faulty sensors through the contribution of dual statistics. Simulation results show that the bi-statistic criterion method has good ability of fault detection and diagnosis for rate gyro in satellite attitude control system.