无线电罗差空中校正方法

Research on Aerial Correction of Compass Error of Automatic Direction Finder

研究了直升机无线电罗盘(ADF)罗差产生的原因及特性,提出了一种基于卫星导航定位技术的无线电罗差空中自动校准方法,通过获取直升机组合导航系统的位置数据与地面基准点位置数据确定相对方位角,其值与罗盘显示方位角比较即为无线电罗差。该方法较常规方法,场地适应性强,能有效解决外场无专用罗盘场地无法矫正罗差的问题。

The causes and characteristics of the Automatic Direction Finder(ADF)deviation of helicopters were studied,and a method of automatic radio compass deviation correction in the air based on satellite navigation and positioning technology was proposed.The azimuth angle between the helicopter's combined navigation system and the ground reference point was determined by obtaining the helicopter's position data and the ground reference point's position data,and the difference between the value and the display azimuth angle of the radio compass was the radio deviation.This method was more adaptable to the site than conventional methods and effectively solved the problem of being unable to correct the deviation in the field without a dedicated compass site.