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Journal of the Korea Institute of Military Science and Technology 2002;5(3):113-119.
Target Adaptive Guidance Using Near-Zone Information from IR Seeker
,
근접영역에서의 IR 탐색기 정보를 이용한 표적적응유도
엄태윤, 김필성
국방과학연구소
Abstract
A target adaptive guidance(TAG) algorithm is proposed employing the near-zone signal that can be measured from an infrared seeker. The guidance order is composed of a conventional PNG command and an additional command to be calculable from an additional LOS rate between a hot point of target and a required intercept point. The characteristic of the near-zone signal is similar to that of LOS rate that is inversely proportional to the square of time-to-go. Hence the proposed scheme can be applied to real systems with no estimator for time-to-go. From analysis results on the miss distance with perfect missile and perfect seeker, it follows that the proposed TAG algorithm guarantees missile to be ideally guided to the required intercept point. And it is less affected by the TAG start time and a proportional navigation ratio than other TAG schemes using a LOS rate such as a step bias or a ramp bias.
Key Words: Target Adaptive Guidance, Infrared Seeker, Near-Zone Signal, PNG
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