影响天线高仰角跟踪性能的因素分析

雷达或遥测系统大多采用方位－俯仰型天线座，这样方位支路跟踪时，原理上需要引入正割补偿，且补偿系数随着俯仰角的提高而增大。引入正割补偿后将对天线高仰角时的跟踪性能产生影响。迄今为止的有关著作只对其中部分因素进行了论述。本文对这些因素进行了全面分析，并以实际目标飞行数据说明，在不同条件下，主要影响因素也会不同。

An Analysis of Factors Influencing the Tracking Performance in High Elevation

Elevation over azimuth type pedestal is frequently used in radar and telemetry system. The secant compensation must be applied in the servo system of the azimuth axis for this type of pedestal. When the elevation goes high the tracking perfomance of azimuth axis is influenced by two factors as follows. First,dynamic delay become larger because of the angle velocity and angle acceleration become larger. Second,random tracking error become larger because of the application of secant compensation. In this article the two factors are discussed. The analysis and data reach a conclusion that in some case the second factor become the major factor.