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To determine a guidance law which is suitable for Target Tracking System(TTS) of an underwater vehicle, the performance (hitting probability) of TTS were calculated with four different guidance schemes, considering underwater vehicle`s manoeuvrability and characteristics of seeking equipment such as sonar To evaluate the performance of TTS with each guidance law, numerous target-tracking simulations of underwater vehicle were performed under the condition of target`s various motion scenario. Furthermore, the effect of sonar characteristics to the performance of guidance law in TTS was studied by changing parameters of sonar such as frequency of ping and detecting error of target. The pursuit-tail guidance law showed the best performance among four different guidance laws. Complex motion of target from straight line to turning circle and zigzag movement, low frequency of sonar ping and large detecting error of target decreased the hitting probability.⨀棰㆗⨀Ā棰㆗⨀肔ᢗ⨀Ȁ肔ᢗ⨀゗⨀Ā゗⨀゗⨀Ā゗⨀゗⨀Ā゗⨀゗⨀Ȁ゗⨀゗⨀Ȁ゗⨀゗⨀Ȁ゗⨀゗⨀Ȁ゗⨀㆗⨀ⴀ㆗⨀㆗⨀Ḁ㆗⨀~㆗⨀⨀~㆗⨀ᢎ㆗⨀ᢎ㆗⨀ゞ㆗⨀ᨀゞ㆗⨀䢮㆗⨀ഀ䢮㆗⨀悾㆗⨀悾㆗⨀磎㆗⨀磎㆗⨀郞㆗⨀؂郞㆗⨀㆗⨀Ȁ㆗⨀烯㆗⨀Ȁ烯㆗⨀゗⨀Ѐ゗⨀㣰㆗⨀Ā㣰㆗⨀䃰㆗⨀Ā䃰㆗⨀䣰㆗⨀Ā䣰㆗⨀僰㆗⨀Ȁ僰㆗⨀゗⨀Ȁ゗⨀烰㆗⨀Ȁ烰㆗⨀磰㆗⨀Ȁ磰㆗⨀郰㆗⨀Ȁ郰㆗⨀㆗⨀Ȁ㆗⨀㆗⨀Ȁ㆗⨀㆗⨀Ȁ㆗⨀胰㆗⨀Ԁ胰㆗⨀㆗⨀Ȁ㆗⨀飱㆗⨀Ȁ飱㆗⨀郳㆗⨀Ȁ郳㆗⨀夋⾗⨀壘⶗⨀⠊゗⨀ㄋ䠊゗⨀偠ᢗ⨀倊゗⨀ऋ怊゗⨀ࠋ

A Study on the Guidance Law Suitable for Target Tracking System of an Underwater Vehicle