一种机载导航设备航向校正方法

A Heading Correction Method for Airborne Navigation Equipment

针对中小型无人机(UAV)导航设备中的航向校正问题,提出了一种通过机载光电吊舱和全球定位系统(GPS)分别测量地面控制站相对于无人机的方位角,来确定无人机航向角偏差的"回头看"校正方法,用于校正中小型无人机的磁力计输出的航向数据。在测试试飞试验中,利用该校正方法对无人机航向进行校正后,将机载光电吊舱对目标定位的方位误差由校正前的2.5°减小到0.5°,距离误差由校正前的3.0km减小到0.5km,验证了该方法对无人机航向校正的可行性和有效性。

The heading correction problem of the small and medium-sized unmanned aerial vehicle（UAV）navigation equipment is discussed in this paper.To correct the heading data output from the UAV’s magnetometer,this paper introduces a new method called＂looking-back＂,which can obtain the heading angular misalignment data from airborne electro-optical pod and global positioning system（GPS）.This method has significantly improved the accuracy of the target positioning of airborne electro-optical pod by correcting the UAV’s heading data during the UAV flight test of verification.It can decrease the margin of error for the target azimuth from 2.5°to 0.5°,as well as to decrease the margin of error for the target distance from 3.0km to 0.5km.This test proves the validity and efficiency of the＂looking-back＂method for the correction for UAV heading.