超宽带对典型调频引信安全性的影响

发布时间：2018-10-30 16:25

【摘要】：针对实际应用中某型调频引信意外发火的问题,构建了引信超宽带(ultra-wide band,UWB)辐照效应试验系统,开展了辐照效应试验,分析了UWB对该型引信安全性能的影响,并确定了引信的失效机理。理论分析和试验结果表明:UWB会造成受试引信意外发火;重复频率越高,UWB对受试引信的干扰能力越强。同为100 k V/m的辐照场强,单次、10 Hz重频、20 Hz重频和50 Hz重频触发条件下引信发火率分别约为20%、30%、50%、80%。受试引信失效机理为:UWB辐射能量直接作用在引信天线和圆柱屏蔽腔体上,引起公共地电位波动,瞬变电压通过公共地电位传导至执行电路电源端,电源端瞬变电压上升率超过了晶闸管临界电压上升率,导致晶闸管意外导通,从而使引信发火。
[Abstract]:Aiming at the problem of accidental ignition of a certain type FM fuze in practical application, a fuze ultra-wideband (ultra-wide band,UWB) radiation effect test system is constructed, and the radiation effect test is carried out, and the influence of UWB on the safety performance of this type of fuze is analyzed. The failure mechanism of fuze is determined. The theoretical analysis and experimental results show that UWB can cause accidental ignition of the tested fuze, and that the higher the repetition rate, the stronger the jamming ability of UWB to the tested fuze. At the same radiation field strength of 100kV / m, the fuze firing rate is about 200.3030g / m at 10 Hz repetition, 20 Hz repetition and 50 Hz repetition trigger, respectively, and the fuze firing rate is about 80% under the condition of 10 Hz repetition rate, 20 Hz repetition rate and 50 Hz repetition rate, respectively. The failure mechanism of the tested fuze is as follows: the UWB radiation energy acts directly on the antenna of the fuze and the cylindrical shielding cavity, which causes the common ground potential to fluctuate, and the transient voltage is transmitted to the power source of the executive circuit through the common ground potential. The rise rate of transient voltage at the power source exceeds the rise rate of the critical voltage of the thyristor, which leads to the accidental conduction of the thyristor and makes the fuze ignite.
【作者单位】： 军械工程学院静电与电磁防护研究所;
【基金】：国防973项目(613196) 国防科技重点实验室基金(9140C87010213JB34005)~~
【分类号】：TN925
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本文编号：2300526