无线电引信执行电路抗超宽谱电磁脉冲研究

为了研究强无线电引信对电磁脉冲辐照效应的防护加固措施,对某型引信执行电路进行超宽谱辐电磁脉冲(UWS-EMP)辐照实验,分析了超宽谱电磁脉冲干扰引信执行电路的原因是它能够使引信执行电路中的晶闸管意外导通,使引信发火。对防护加固改造前后的引信执行电路用UWS-EMP进行了对比辐照实验,用PspiceA/D仿真软件进行了仿真实验,结果证明防护加固措施大大提高了无线电引信执行电路抗UWS-EMP的能力,而且对引信的性能没有影响。

Research on the Amelioration of Radio Fuze's Execution Circuits Against UWS-EMP

The radio fuze used in experiments is a decimeter wave radio proximity fuse,assembled on mortar shell of different calibers.The radio fuze also can be assembled on serious types of shell like fragmentation cartridge,burst cartridge,steel-ball shrapnel.First the radiating fields and waveform are measured by UWS,TEM antenna,shieded cable.Second the reason of interference on a certain fuze's execution circuits caused by UWS is analyzed by irradiating the fuze's execution circuits with UWS to bring forward the amelioration, and reason is that UWS-EMP can cause the SCR of radio fuze conducting accidently,to further cause fuze firing.The fuze is reinforced by appending a big inductance between radio fuze resource and executive circuits of radio fuze.Then radiation experiments are carried on to reinforce fuze with UWS-EMP compared to original fuze.In order to evaluate the ability of improved fuzes' executive circuits resisting UWS-EMP,the simulation is also carried out.And the results of simulation and radiation experiments prove that the amelioration can improve the capability of fuze against UWS-EMP.Finally the influence of amelioration on fuze's performance is evaluated by comparing the radiation waveform and simulation waveform of both original fuze and improved fuze,and the results of radiation and simulation experiment show that the discharge time and amplitude of the original fuze and improved fuze are consistent.And the improved fuze is radiated to evaluate the firing capability.The radiating result indicates that the firing capability of improved fuze is same as original fuze.These comparison experiments prove that amelioration makes no difference to fuze's performance.