一种全空域电扫球面相控阵单脉冲角跟踪方法

A Monopulse Angle Tracking Method for Electronically Scanned Spherical Phased Array in Hemispherical Coverage

针对目前全空域球面相控阵测控系统在过顶跟踪时存在跟踪性能下降的问题,对角跟踪系统进行建模分析,得出了常规角跟踪系统过顶性能下降原因,提出了一种基于三维直角坐标系表示的方向矢量角跟踪方法。该方法通过优化角跟踪系统架构,设计合适的角跟踪环路滤波器参数,能够避免常规角跟踪方法跟踪变量的非线性转化,从而实现对全空域无盲区稳定跟踪。仿真验证显示该方法在全空域均有很好的跟踪性能,具有较好的工程应用价值。

For the overhead angle tracking performance deterioration problem of spherical phased array space tracking,telemetry and command(TT&C)system in hemispherical coverage,a model of the angle tracking system is established and analyzed,and the reason of overhead performance deterioration in existing angle tracking system is obtained.Thus,a angle tracking method of direction vector in three-dimensional rectangular coordinate system is proposed.According to optimizing the architecture of angle tracking system and designing appropriate parameter of angle tracking loop filter,the nonlinear conversion of angel tracking variable is avoided and thus the performance of blind-free stable tracking is achieved.The simulation results show that the proposed method has excellent angle tracking performance in hemispherical coverage,which is adaptive to engineering application.