捷联式天线平台的角跟踪系统设计

Design of an Angle Tracking System With Strapdown Antenna Platform

捷联式雷达导引头的角跟踪系统采用弹体姿态角补偿法可实现天线的捷联纯稳定 ,但无法直接得到用于比例导引的惯性视线角速率。为此 ,提出一种新的设计思路 ,将天线稳定与目标跟踪独立进行设计 ,即在捷联稳定的基础上 ,采用卡尔曼滤波方法来估计目标视线角速度。仿真结果表明 ,相同参数条件下 ,卡尔曼滤波法比微分法精度高 ,对测量噪声较大的情况更为有效。该设计方法对于捷联稳定导引头如何实现比例导引具有指导意义。

The attitude angle compensation can be used to stabilize a strapdown seeker antenna, but inertial line-of-sight (LoS) rate for proportional navigation cannot be obtained directly. For this purpose a new design method is put forward. Antenna stabilization and target tracking are designed separately. Adaptive Kalman filter is applied to the estimation of the LoS rate. It is shown that the performance can be improved by use of a Kalman filter compared with a differential fiher with the same parameters, and it is more effective when there is a sensor noise. This method is practical for a strapdown stabilization seeker to accomplish proportional navigation.