基于反目标法的引信复杂终点弹道等效模拟试验系统

In response to the increasing demand for high initiation reliability of fuze under complex terminal ballistic in mobile warfare, an equivalent simulation test system for complex terminal ballistic of fuze based on the counter target method is studied to address the issues of limited incident angle, non-real-time acquisition of initiation signals, and high testing cycle / cost in current forward shooting tests. The similarities of axial impact characteristics of key modules in 30 mm small caliber projectile fuze are compared through finite element simulation. A theoretical model of the impact characteristics of a cylindrical target plate reverse impact fuze is established based on elastic-plastic mechanics. The theoretical model is numerically solved using a micro surface force method and verified through comparison of simulated results. An equivalent simulation test system model is built based on a 20 mm light gas gun, and the response characteristics of two trigger switches are collected in real-time and studied. The experimental results show that the response time of a trigger switch for small caliber projectile fuze when forwardly impacting on a 2 mm aluminum alloy target plate is approximately 58. 2 μs. The feasibility of the equivalent simulation test system based on the counter target method is verified by comparing the calculated results of the forward shooting test fuze hitting a 2 mm aluminum alloy target plate and causing a “surface explosion”.