An Algorithm of Delay-Time Calculation for the Man-Portable Air-Defense Missile Laser Fuze

This paper proposes an appropriate algorithm for delay-time calculation of laser fuze mounted in the Man-Portable Air Defense Missiles (MANPADS). The proposed algorithm is based on fuze-warhead coordination which uses the parameters of missile-target intersection to calculate the delay time. For each approaching case, the delay time is found by analyzing the “kinetic-geometry” relationship of the missile, fragments, and the target to ensure that the midline of fragment dispersion midline passes through the center of the target. To reduce the number of delay elements, all approaching cases are divided into four areas based on fire mode and azimuth angle, with each delay element capable of serving one of these areas. The time of each delay element will be determined by averaging the values of all cases. The detection angle is chosen by the angle of the midline of the fragment dispersion, the delay time does not depend on the miss distance. In this paper, the calculation method has been applied to the hypothetically large target. Validating the error caused by using the average miss distance, the results indicate that there is an approximate 8. The algorithm is appropriate for actual combat because the evaluation shows that fragments always hit the target in all cases. © 2024 The Aeronautical and Astronautical Society of the Republic of China. All rights reserved.