| Citation: | SHI Xudong, ZHANG Hemao, ZHAO Hongxu, et al. Terminal response mechanism of complex wire harness under double BCI coupling[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(9): 1739-1747. doi: 10.13700/j.bh.1001-5965.2020.0336(in Chinese)
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It is difficult to construct in a high-intensity radiation field laboratory environment, and the application of dual Bulk Current Injection (BCI) probe instead of irradiation methods for interference immunity research has broad prospects. Aimed at the current unclear coupling mechanism between dual bulk current injection probe and wire harnesses, accurate model of dual bulk current injection probe coupled with wire harness is established. Using the method of segmentation and then cascading, wire harness is studied. First, the equivalent circuit model is established in the coupling zone between the probe and the harness, and then the link parameter matrix is constructed based on the transmission line theory in the uncoupling zone. Finally, it could be cascaded into a wire harness terminal response prediction model. A numerical electromagnetic simulation model is established based on finite integration method, and the prediction results of the prediction model and the numerical simulation model for the wire harness terminal response are compared. The results show that the two have good agreement on the results of the wire harness terminal voltage, and MAPE is 17%, which further verifies the effectiveness of the model. Using the model to analyze the influence of the relative position of the harness and probe on the response voltage of the terminal, the results show that the relative position has no effect in the low frequency band, exceeding 100 MHz, and the amplitude and resonance point of the terminal voltage will change.
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