电晕放电对机载无线电罗盘的干扰

Study on Interference in Airborne Radio Compass Caused by Corona Discharge

特高压输电线路的电晕放电是机载无线电罗盘的主要干扰源之一。根据无线电罗盘的工作原理,在特高压输电线路电晕干扰条件下,通过理论推导得出了无线电罗盘测得的电台相对方位角偏差。针对无方向信标台不同频率、功率及罗盘与输电线路间不同的距离,对无线电罗盘受干扰影响产生的测角偏差进行了仿真分析。研究表明:电晕放电干扰下,机载无线电罗盘测得的电台相对方位角偏差随频率、功率、距离的增加而减小,变化趋势由陡峭逐步趋近平稳。

Ultra High Voltage（UHV） transmission line corona is one of the main interference sources of airborne radio compass. According to the working principle of radio compass, the radio relative azimuth angle deviation measured by airborne radio is given theoretically. The angle deviation is simulated on the condition of different frequency, power of non-directional radio beacon and distance between radio compass and transmission line. The study shows that with the interference caused by corona discharge, the radio relative azimuth angle deviation measured by airborne radio changes steep leveled off with the increase of frequency, power and distance.