脱靶量预测补偿对视线角速度测量精度的改善

The Improvement of the precision of LOS angular rate with tracking errors prediction

一般动基座光电跟踪测量系统需要在跟踪状态下实时输出视线角速度,该角速度一般由角度测量元件通过微分算法测得.当所测速度为低速范围时且测速精度要求较高时,仅依靠算法无法达到测速精度要求.考虑到动态跟踪机理,利用图像跟踪系统输出的目标脱靶量信息与角度信息进行数据融合,可以提高角速度的测量精度.本文对脱靶量的滞后效应对测速精度的影响进行了分析,同时提出了一种脱靶量的实时预测技术.实验表明,采用目标脱靶量的预测补偿方法可以提高视线角速度测量精度.

Normally,L0S angular rate,measured by the angle-measuring devices by differential algorithm,need to be exported in the state of tracking for moving_base opto-electronic tracking system.When the range of angular rate measuring belongs to low speed extend,besides,the precision of angular rate measuring is high,the precision can not be acquired with the algorithms.Because of the mechanism of dynamic tracking,the precision of angular rate measuring can be improved by combining the angle output with tracking errors obtained with the vedio tracking mechanism.Thus,this paper analyze the delay effect of tracking errors on the precision of angular rate measuring and a algorithm called realtime prediction is presented.It is improved that the experiments raised the precision of angular rate.