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中文摘要：
当鱼雷来袭时，为了提高防御效果潜艇可投放自航式声诱饵进行对抗。根据潜艇投放自航式声诱饵对抗鱼雷的过程，建立了自航式声诱饵的优化弹道模型、潜艇的机动规避模型、鱼雷的搜索和攻击弹道模型、对抗过程中的声探测模型，在此基础上仿真分析了自航式声诱饵直航转角式弹道参数设计对潜艇生存概率的影响。结果表明：对诱饵直航段距离和转角进行合理设计可显著提高鱼雷来袭时潜艇的生存概率。
英文摘要：
When a torpedo is coming towards a submarine, it may launch mobile acoustic decoy to improve defence effect. According to the countermeasure procedure of submarine launching mobile acoustic decoy to fight against the torpedo, optimized trajectory model of mobile acoustic decoy, maneuver evasion model of submarine, search and attack trajectory model of torpedo and acoustic detection models in countermeasure course were built, and on this basis the parameters of direct sailing turn-corner trajectory of mobile acoustic decoy on submarine＇s survival probability were simulated and analyzed. The results show that by properly designed direct sailing distance and turn angle it can improve submarine＇s survival probability obviously.
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