Analysis Of Coupling Effects Of Strong Electromagnetic Pulses In Complex Systems

Due to the development of high-power weapons and equipment in the information warfare,the electromagnetic environment of electronic equipment and equipment platform is becoming more and more complex.The energy generated by the electromagnetic pulse will enter the system through radiation,conduction and other methods,thereby causing damage to the equipment or the circuit inside the system.As the use of missile ignition and control,electro-explosive devices are widely used in various military systems,which are easily affected by the strong electromagnetic pulse and thus fail or explode,resulting in economic losses or casualties.However,in a complex system,strong electromagnetic pulses will be coupled into the system through receiving antennas,windows,and vents.At present,in front door coupling analysis of airborne antenna,the electromagnetic field of the receiving antenna will cause the complexity of the surrounding electromagnetic environment,which is often ignored.The receiving antenna receives the electromagnetic signal and transmits it to the load,which is only studied.On the other hand,to study the influence of the backdoor coupling effect on internal circuit,the problem is that there is a huge gap between the structure of the electromagnetic field and the size of the internal cables.The results of this paper can not only provide data support for the safety performance of electronic equipment,but also provide reference for the protection of complex systems with strong electromagnetic pulse.The main research contents of this paper are as follows:First,According to the time domain integral equation method(TDIE),the simplified model of bridge wire electro-explosive devices is established.The effects of electromagnetic radiation on the induced current of the bridge wire on the electro-explosive devices are simulated and analyzed from three aspects: different polarization direction,different resistance of the bridge wire and the change of the frequency of the incident wave.Second,Under different strong electromagnetic pulses,the characteristics of the time-domain variation of the induced current at the antenna load based on the vehicle antenna of the gun carriages is studied.The electro-thermal characteristics of the PIN diode of the physical model under strong electromagnetic pulses are also analyzed with spectral-element time-domain(SETD).Finally,In the analysis of the coupling effect of the back door,the influence of electromagnetic interference on the coupling to the internal field intensity is obtained with the variation of orifice,shapes and numbers of openings.The influence of different electromagnetic interference on the internal field intensity of the unmanned aerial vehicle is also simulated.Finally,by coupling the electric field and the transmission line equation,a complete integrated analysis model of field-line-circuit is established,which realizes the independent and fast solution of the electromagnetic field structure and the line part.