微波暗室对导弹仿真系统影响的误差分析

Error analysis of the impact for the anechoic chamber on the missile simulation system

在导弹半实物仿真系统中,微波暗室在提供模拟射频环境的同时,也给仿真系统带来了一定的误差.提出了一种暗室对导弹仿真系统影响的误差具体计算方法.通过对微波暗室环境建模,给出了从射频目标到暗室静区的能量计算方法,并利用数值积分的方法,分别计算得到了静区4个象限的能量值.根据比幅和差式单脉冲雷达测角原理,计算得到了导引头雷达的测角误差,并代入到导弹仿真系统中进行仿真.仿真结果表明,加入暗室误差后,导弹的轨迹发生了偏移,并使得导弹命中精度下降,但仍处于导弹命中误差范围内.

In the missile semi‐physical simulation system , the anechoic chamber provides a radiofrequency simulation environment , and at the same time it brings an error for the simulation system . This paper proposes a specific error calculation method of the anechoic chamber on the missile simulation system . By modeling the anechoic chamber , it gives a computing method for quiet zone energy , and computes respectively energy for four quadrants of the quiet zone using numerical integration . Then according to the theory for angle estimation characteristic of amplitude comparison mono‐pulse radar , this paper computes the angle error of radar on the seeker . Besides , the error is put into the missile simulation system . Simulation result shows that , when adding the anechoic chamber error , the trajectories of the missile and target both shift , decreasing the missile hit accuracy , but the error is still within the error range .