Abstract: Considering the life span of high reliability redundancy EWIS components obeying exponential distribution with unknown parameters, a zero-failure data reliability analysis method was put forward to evaluating the reliability of EWIS. Monte-Carlo sampling method was applied to parallel-series EWIS life span, and the “minimization maximum” method was used to get the EWIS life span. Probability paper test was used to judge whether EWIS life obey Weibull distribution initially, and then Pearson fitness test was used to identify the distribution obeying Weibull distribution or not. Taken zero-failure data flight samples and the hypothesis of EWIS life obeying Weibull distribution into account, the zero-failure data reliability analysis method was applied to evaluate the reliability of EWIS. The research method is meaningful for analyzing redundancy designed EWIS reliability with zero-failure data.

Key words: electrical wiring interconnection system, redundancy design, Monte-Carlo simulation, zero-failure data, reliability, life span distribution