相控阵导引头空域搜索策略研究

Study on Strategy of Phased Array Seeker Spatial Searching

为提高相控阵导引头在中末制导交班时搜索效率,对空域搜索策略进行了研究。分析了中末制导交班的误差源,根据目标指示误差设计了圆形7波位、矩形9波位和矩形25波位三种空域搜索策略。考虑回波遮挡和目标雷达反射截面(RCS)起伏效应,采用复合制导系统模型,通过仿真对三种空域搜索策略进行了全弹道性能评估和对比分析。结果发现:在三种搜索策略中,少波位搜索策略的覆盖范围小于多波位搜索策略,但搜索时间长度小,因中末制导交班的空域搜索时间有限,综合考虑认为少波位搜索策略的搜索效率较多波位更高;圆形7波位策略较矩形9波位能在相同时间内搜索内更多的圈数,故其性能最佳。

To increase the search efficiency of phased array seeker in stage of handover of missile guidance from midcourse to terminal, the spatial searching strategy was studied in this paper. The errors of handover of missile guidance from midcourse to terminal were analyzed. Three kinds of spatial searching strategies were designed according to the distribution of indicated angle error, which were circular 7 beams, rectangluar 9 beams and rectangluar 25 beams. With the consideration of echo eclipse and radar cross section fluctuation, the performances of three kinds of spatial searching strategies were assessed by using compound guidance system in the whole trajectory through simulation. The results showed that low beams searching strategy had smaller coverage but shorter intercept time than high beams searching strategy. Because the intercept time was limited in the stage of handover of missile guidance from midcourse to terminal, it was believed that low beams searching strategy had higher efficiency than high beams searching strategy. The circular 7 beams strategy can search more circles than rectangluar 9 beams strategy in the same time. This means that circular 7 beams strategy has the highest search efficiency.