自适应变长线性拟合的多阵方位平滑同步方法

Adaptive variable-length linear fitting method for multi-array azimuth trajectory smoothing and synchronization

在多阵方位轨迹关联融合过程中,由于单阵输出方位的节拍和时刻不同需要进行同步并且在拟合过程中定长、定阶拟合函数与任意方位曲线存在失配问题,为此文章提出了一种自适应变长线性拟合方法。该方法首次采用分段线性拟合对方位轨迹正切值进行拟合,通过实时监测跳变点及平滑后的拟合效果(即连续在拟合线段同一侧的平滑前的轨迹点占平滑前总轨迹点数的比例),实时改变拟合线段长度。试验数据处理结果表明,该方法可以解决多阵方位同步问题,对各种方位轨迹曲线有较好的拟合精度且计算速度快,为后续多阵方位轨迹关联融合处理提供支撑。

An adaptive variable-length linear fitting method is proposed to solve the synchronization problem of the single array output azimuths at different times and the mismatch problem between the fixed length and order fitting function and the arbitrary azimuth curve in the fitting process. In this method, piecewise linear fitting is used to fit the tangent of azimuth trajectory for the first time. Through real-time monitoring of the jump points and by the fitting effect obtained after smoothing(i.e. the proportion of track points before smoothing continuously on the same side of the fitting line segment to the total track points before smoothing), the length of the fitting line segment is changed in real time. The experimental data processing results show that this method can solve the problem of multi-array azimuth synchronization, has good fitting accuracy and fast calculation speed to arbitrary azimuth trajectory curves,and provides support for the subsequent multi-array azimuth trajectory association and fusion processing.