| Popis: |
Summary form only given. We report on the simulation and experimental study of the effects of wideband high power pulses on mission critical electrical components of communication and control systems. An electromagnetic topology (EMT) simulation code, which is based on a volume decomposition technique and designed specifically for large electrical systems, was employed in the study'. The application of the EMT simulation code to analyze the effects on electrical components involves many complex numerical steps'. Here, we propose a numerical scheme based on the modular scattering junction concept that combines several EMT computational steps into a single EMT simulation step. Based on this scheme, computational volumes can be modified through analytical and computational techniques, such as transmission-line matrix compaction, the finite-difference time-domain, and reciprocity. It also allows for sub-structural modifications without having to repeat calculations for the entire system. In our calculations, we applied the EMT simulation to a complex electrical system, incorporating a number of structural volumes and cables. This configuration could represent an aircraft with complex internal cabling, irradiated by an external wideband pulse where the interaction path is through an aperture, i.e., opening or crack, of the external aircraft surface. The numerical results generated by this proposed scheme have been validated through experimental results. The EMT-based calculations and the measured currents on the cable behind the slot aperture showed good agreement with each other, revealing the consistency in our proposed scheme. The proposed scheme is modular in nature. It offers an advantage of adding more modules later in the simulation cycle without having to repeat the whole simulation calculation each time the network configuration changes slightly. |
