角跟踪系统模拟器的跟踪收敛性分析

Tracking Convergence Analysis of an Angle Tracking System Simulator

跟踪收敛性是角跟踪系统模拟器性能指标的重要体现。角跟踪系统常会因为方位俯仰信号的正交性不好造成交叉耦合较大或者链路处理时间较长引起误差积累,导致角跟踪收敛性不好。为此,研制了角跟踪系统模拟器。该模拟器根据天线方向图设计查找表,控制模拟角跟踪系统和差路信号幅度和相位,从信号幅度和相位处理环节减小交叉耦合;通过缩短角跟踪系统模拟器软硬件处理时间,减小误差积累。从减小交叉耦合和缩短系统处理时间两方面着手,较好地实现了增强角跟踪系统模拟器跟踪收敛性的目的。

Tracking convergence is an important reflection of the performance of an angle tracking system simulator. Because the orthogonality of azimuth and pitching signals is not good,the cross-coupling is large,or the link processing time is much long so as to cause errors accumulation,which lead to poor angle tracking convergence. For this problem,an angle tracking system simulator is developed. It designs the look-up table according to the antenna pattern,controls the sum and difference channel signals’ amplitude and phase,reduces the cross-coupling in signal amplitude processing and signal phase processing link. It reduces the error accumulation by shortening software and hardware processing time of the simulator. Enhancing the convergence of the angle tracking system simulator can be better realized by reducing cross-coupling and shortening system processing time.