导引头跟踪回路滤波特性仿真分析

Simulation Analysis on Seeker Tracking Loop Filtering Characteristics

反辐射导引头是反辐射导弹的重要组成部分,陀螺稳定平台导引头是最常用的一种导引头,给出了制导控制所需的视线角速度信息。但由于平台的随机扰动和被动导引头的测向噪声,导致导引头无法实现视线角速度的准确测量,因此需要对跟踪回路进行滤波,以得到满足制导要求的视线角速度信息。惯性环节滤波器和矩形窗平均值滤波器是2种常用的数字滤波器,通过Simulink仿真对采用这2种滤波器的跟踪回路特性进行了分析,比较了时域和频域的差异性,给出滤波方法的选择依据。

The anti-radiation seeker is an important component of anti-radiation missile,and the gyro stabilization platform seeker which provides target sight line angular speed of guidance/control is the most commonly-used seeker.The stochastic perturbations of platform and seeker direction finding noises make the seeker not be able to realize the exact measurement of seeker target sight line angular speed,so it is required to implement tracking loop filtering.The inertia element filter and rectangular window mean value filter are two commonly used digital filter,through Simulink simulation,this paper analyzes the tracking loop characteristics using the two filters,compares the characteristics of time-domain characteristics and frequency domain,and provides the selection basis of filtering method.