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A capture probability analytic model for the electromagnetic launched anti-torpedo torpedo
Defence Technology ( IF 5.1 ) Pub Date : 2021-01-05 , DOI: 10.1016/j.dt.2020.12.006
Bao-qi Wu 1, 2 , Xiao-cun Guan 1 , Shao-hua Guan 1 , Jing-bin Shi 1
Affiliation  

With the unique characteristics, electromagnetic launch technology is applicable to launch shipborne anti-torpedo torpedo(ATT). This paper aims to establish an analytic model to pre-evaluate the capture probability of the electromagnetic launched ATT. The mathematics model of the multi-stage coilgun and the trajectory of the ATT is established for analysis. The influence factors of the capture probability are analyzed respectively, including the entry point dispersion of the ATT and the position dispersion of the incoming torpedo. Adopting the advanced angle interception mode, the ATT search model is obtained according to the positional relationship, and the course error is synthetically calculated according to the differentiation of implicit function. A geometric method to calculate the integral boundaries of the probability density function is proposed, based on the relative motion of the ATT and the incoming target. To verify the proposed integral model, the digital simulation and comparison is conducted. The results reveal that the variation trends and the calculation value of the proposed analytic model are coincident with the statistic results from Monte Carlo method. And implications of the results regarding the analytic model are discussed.



中文翻译:

电磁发射反鱼雷鱼雷的捕获概率分析模型

电磁发射技术具有独特的特点,适用于发射舰载反鱼雷鱼雷(ATT)。本文旨在建立一个分析模型来预评估电磁发射ATT的捕获概率。建立了多级线圈炮的数学模型和ATT的弹道进行分析。分别分析了捕获概率的影响因素,包括ATT的进入点色散和来袭鱼雷的位置色散。采用超前截角方式,根据位置关系得到ATT搜索模型,根据隐函数微分综合计算航向误差。基于ATT与来袭目标的相对运动,提出了一种计算概率密度函数积分边界的几何方法。为了验证所提出的积分模型,进行了数字仿真和比较。结果表明,所提出的解析模型的变化趋势和计算值与蒙特卡罗方法的统计结果一致。并讨论了结果对分析模型的影响。

更新日期:2021-01-05
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