正态圆分布下的双机吊放声纳扩展方形搜潜建模

针对反潜直升机吊放声纳搜潜概率计算问题,在分析扩展方形搜潜法的基础上,提出了对称扩展方形搜潜法。并且,以双机使用吊放声纳搜潜为例,以目标位置服从正态圆分布为条件,采用解析法建立了对称扩展方形搜潜概率计算模型。同时,针对已探测区不出现目标的面积会随时间衰减的事实,对搜索概率计算模型作了修正。最后,仿真计算了搜索高、低速两类目标下的搜索概率,结论是:搜索低速目标时,对称扩展方形具有更高的发现概率;而对于高速目标,两种方法的搜索概率都较低,难以满足反潜要求。

Searching of Submarines with Circular Normal Distribution by Dual Helicopters Using Dipping Sonar in Extended Squared Searching

Aiming at the search probability calculation for antisubmarine helicopters in submarine search with dipping sonara symmetrical extended squared search method is proposed.Supposing that the submarines are in a circular bivariate normal distributionthe models for calculating the search probability are established for dual-helicopter using dipping sonar in extended squared search.Thenthe search probability model is revised considering that the area of target will change with time.The probabilities for searching two kinds of submarines moving in high and low speed are calculated out.The results show that:the symmetrical extended squared search mode has higher search probability if target is a low-speed submarine;while for a high-speed oneboth the two methods search probabilities are not high enough to satisfy operation request.