塔康地面信标半幅探测电路对测距精度的影响分析

Analysis of Effect of Half-Amplitude Detection Circuit on Measuring Accuracy in TACAN Beacon

在分析塔康信标半幅探测电路工作原理的基础上,重点讨论了影响塔康系统测距精度的主要因素,一方面推导出半幅探测脉冲的定时误差与参考电压的幅度误差之间的定量关系μs(??ut 3)V(/)?,另一方面讨论了当多径干扰造成测距脉冲波形展宽而导致定时误差时,提出了一种通过测量半幅探测脉冲的实际宽度T来间接得出定时误差?t,从而控制延时时间减小定时误差的补偿方法,达到提高测距精度的目的。

On the basis of analyzing the working principle of TACAN beacon＇s half-amplitude detection circuit, the main factors affecting the distance measuring accuracy of TACAN are discussed. On one hand, the quantitative relationship between the timing error of half-amplitude detection pulse and the amplitude error of reference voltage is derived. On the other hand, a method to reduce the timing error caused by multipath interference is proposed by controlling the delay time, so as to improve the accuracy of distance measuring.