红外搜索跟踪系统测试

Test of infrared search and track system

针对当前红外搜索跟踪系统的测试设备存在测试项目单一的问题,结合作用距离测试原理及动态靶标的研制思路,设计了一种兼顾测试作用距离及跟踪精度的测试设备。为获得良好的远距离点目标动态模拟效果,采用控温黑体与渐变式衰减片组合的方式模拟远距离目标,使用双反射镜旋臂系统模拟目标运动过程,并对测试设备控制系统进行了规划。在对测试系统各部分测试精度进行分析的基础上,对由旋臂转动造成的误差使用有限元分析软件进行重点分析,在旋臂转速为6 rad/s时,跟踪测试精度误差为0.004 mrad,可以满足测试精度要求。该设计为红外搜索跟踪系统测试设备的研制及改进提供了可行的方法及理论基础。

In view of the problem of simplicity in test project of infrared search and track system（IRST） in current, a test equipment taking into account both operating range and tracking accuracy was designed by combining the theory of operating range test and dynamic target. Temperature-control blackbody and step attenuator module were used to simulate remote target, and arm structure with double mirror has been used to simulate target movement, these could promote simulation effect of dynamic target. The control system of test equipment was designed. On the basis of analyzing test accuracy of each part of equipment, the errors were caused by rotating of arm structure were analyzed emphatically by software of finite element analysis. In the rotating speed of 6 rad/s, the error of tracking accuracy is 0.76＂, and equipment could meet requirements of test accuracy. The design provides feasible method and theoretical basis on developing and improving of test equipment of IRST.