In order to simplify the calculation of parallel redundancy operators , the characteristic value rncalculation method of GO operators was used to study the signal failure rate distribution characteristics rnof the parallel redundancy operators. The feasibility was validated that the repairable system with lowrnlevel redundancy could be hypothesized and treated as an exponential distribution unit. Then, an rnimproved algorithm of the parallel redundancy operators in GO model was proposed and applied to the rnreliability analysis of urban rail transit vehicles door system. The results show that for the input signal rnwith exponential distribution, the output signal of parallel operator has a non-exponential rncharacteristic; the improved algorithm can simplify the calculation process of the reliability analysis of rnurban rail transit vehicle's door system by eliminating 10 intermediate variables and 3 calculation steps rnin the original algorithm.%为简化并联冗余操作符的计算,基于GO法的操作符特征量计算方法,研究了并联冗余操作符信号失效分布特性,模拟了低冗余度系统作为假设指数分布单元处理的可行性.对GO模型的并联操作符算法进行了改进,并将改进的GO法应用于城市轨道交通车辆车门系统可靠性分析.研究结果表明:输入信号为指数分布的并联操作符输出信号,具有非指数特性;用改进的GO法分析城市轨道交通车门系统可靠性时,比原有算法减少了10个中间变量和3个计算步骤,简化了计算过程.
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