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Analysis of Environmental Interference Factors and Anti-interference Design Research for Secondary Fuze Detonation of Fuel-air Explosive
WANG Ke, SHI Changjun, GUO Sha, LI Hongbin, DU Haiwen, HE Chao, ZHOU Tao
JPRMG ›› 2024, Vol. 44 ›› Issue (6) : 56-61.
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Analysis of Environmental Interference Factors and Anti-interference Design Research for Secondary Fuze Detonation of Fuel-air Explosive
({{custom_author.role_en}}), {{javascript:window.custom_author_en_index++;}}This study commences with an examination of the operational sequence of the secondary fuze in a fuel-air explosive (FAE) munition, analyzing the potential interference factors such as shock waves and electromagnetic radiation, as well as their characteristics, that the secondary fuze may encounter at the terminal phase of the trajectory. Counter-interference design methods for the secondary fuze are proposed from various perspectives, including trajectory design, circuit design, and structural design. Static detonation experiments were conducted to compare the interference-resistance capabilities of the secondary fuze under two different configurations: independent design and cable-connected design. The experimental results indicate that the secondary fuze with an independent structural design exhibits superior interference-resistance, capable of emitting a normal ignition signal at the preset timing following the explosion of the dispersed charge. In contrast, the secondary fuze with a cable-connected design failed to issue an ignition command at the designated moment, resulting in electrical failure of the components within the fuze. It is postulated that the electromagnetic radiation generated by the detonation of the explosive charge enters the fuze through field-line coupling, thereby causing damage to the fuze. Furthermore, the experimental results demonstrate that under the conditions of this study, the pulse interference current induced has a duration reaching the order of hundreds of nanoseconds, with a peak current reaching tens of amperes, which is sufficient to directly inflict damage on the microcontroller and interface circuits of the fuze.
fuel-air explosive / secondary fuze / electromagnetic radiation / anti-inference {{custom_keyword}} /
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Fig.1 Spectrum distribution of explosive electromagnetic radiation of different formulations[15]Fig.2 Diagram of the relative position of the secondary fuze and cloudFig.3 Structure of secondary fuzeFig.4 Diagram of secondary fuze explosion electromagnetic interference test/
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