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ZHENG, Yuan; CHEN, Zheng; SHAO, Xueming; ZHAO, Wenjie
Chinese journal of aeronautics, 07/2022, Volume: 35, Issue: 7Journal Article
The minimum-time path for intercepting a moving target with a prescribed impact angle is studied in the paper. The candidate paths from Pontryagin’s maximum principle are synthesized, so that each candidate is related to a zero of a real-valued function. It is found that the real-valued functions or their first-order derivatives can be converted to polynomials of at most fourth degree. As a result, each candidate path can be computed within a constant time by embedding a standard polynomial solver into the typical bisection method. The control strategy along the shortest candidate eventually gives rise to the time-optimal guidance law. Finally, the developments of the paper are illustrated and verified by three numerical examples.
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