快速传递对准的抗野值方法研究

快速传递对准对滤波精度与收敛速度有着严格的要求,而测量野点的存在会严重破坏传递对准的精度。提出了一种新的抗野值滤波方法,在线取测量信号的一个小区间,采用正向对称延拓的方法构成新序列并对其进行小波阈值去噪,检测出野点,用前几个周期的信号构造新的测量值进行Kalman滤波,有效地剔除了野点的影响,滤波系统保持了很好的精度,满足了传递对准的要求。

Research on Rejecting Outliers of Rapid Transfer Alignment

Rapid transfer alignment has strict demands for filtering accuracy and convergent velocity,but alignment accuracy is seriously degraded if there exist outliers in measurements.A novel approach to reject outliers is proposed,a small sequence sampled online makes up of a new sequence by forward symmetry extension,which is processed by wavelet threshold de-noising,then outliers can be detected,new measurements made up of previous measurements act as current inputs of Kalman filter,the degradation caused by outlier is removed,accuracy of filtering system obtained for the demand of transfer alignment.