Comprehensive evaluation model of system-level electromagnetic susceptibility

Abstract

Abstract: A system-level electromagnetic susceptibility comprehensive evaluation model is established , and three description parameters including error threshold, system failure probability and alarm time are proposed. First, by analyzing the principle of electromagnetic interference caused errors of system-related performance indicators, error modeling and threshold solving are carried out to realize the quantitative prediction of electromagnetic susceptibility. Then, under this error threshold condition, the fault tree is applied to analyze the system failure probability and establish the failure probability model. Finally, the system alarm time model is established under the premise of system failure. Taking a multi-point positioning receiving system as an example, the experimental simulation verification results show that the average error between the interference threshold predicted by the proposed model and the measured data is within the engineering allowable range. Compared with the classic Volterra behavioral model, the proposed comprehensive evaluation model can not only achieve the effect of predict sensitivity threshold, but also theoretically evaluate the probability of system failure and the mathematical expectation of failure time in the current environment.

Key words: system-level electromagnetic susceptibility, error threshold, system failure probability, alarm time

CLC Number:

GONG Fengxun, SUN Jian. Comprehensive evaluation model of system-level electromagnetic susceptibility[J]. Journal of Civil Aviation University of China, 2023, 41(2): 39-46.

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