一种基于可靠性数学的电磁兼容性分析方法研究

A Method of EMC Analysis Based on Reliability Math

以系统可靠性预计理论为切入点,分析系统可靠性与系统级电磁兼容性的关联性。分析基于电磁干扰"三有限"和可靠性"三规定"的电磁兼容性预测方法。初步建立系统级电磁兼容性指标和性能降级的准则,给出包括串联、并联、混联等几种典型的系统电磁兼容预测模型和预测方法,最后得出基于可靠性预计理论的系统级电磁兼容预测公式,进而为预测电磁兼容性奠定了条件。采用所提方法对某军用计算机系统进行系统级的电磁兼容性预测,预测结果证明了方法的有效性及可实施性。

This paper analyzes the relationship between the system reliability and the systematic electromagnetic compatibility(EMC) based on the system reliability prediction theory.The EMC prediction method is analyzed based on the 'three limitation' in electromagnetic interference(EMI) and 'three rules' in reliability.The paper builds preliminary rules for the systematic liability prediction theory,analyzes EMC specification and performance degradation,and gives several typical systematic EMC prediction models and methods including serial,parallel and combined connection constructions.Systematic EMC prediction equations are gotten based on the reliability prediction theory,which establishes the foundation for the prediction of the EMC reliability.By using the method proposed in this paper,we forecast the systematic EMC of some military computer system and the prediction result validates the effectiveness of this method.