导引头多源信息AGC系统设计

摘要

针对雷达导引头AGC控制处理中传统低通滤波法在输入信号饱和时无法正常工作以及不能直接反映信号幅度的缺陷,通过分析信号幅度与饱和度及功率检波的相互关系,分别提出了基于饱和度的幅度估计方法和平方和功率检波的幅度估计方法,利用这两种方法的特点结合弹载处理机应用,设计了导引头多源信息自动增益控制算法,并给出了实现流程.利用Matlab仿真引入算例,证明其具有响应时间短、控制精度高、系统性能稳定的特点.%Traditional low pass filtering method (LPF) cannot work properly when the input signal is saturated and cannot reflect signal's amplitude directly in radar seeker digital auto gain Control (DAGC). And thus this paper presents an estimation method based on the magnitude of the saturation and sum of squares power detector by analyzing the relationship between signal amplitude, saturation and power detector. AGC algorithm is given by using the characteristics of these two methods with the combination of the application of missile-borne processor, and the implementation process is presented. The Matlab simulation results show that the AGC algorithm has the characteristics of short responsing time, high control accuracy and stable system performance.