针对影响可靠性分配因素的不确定性特点和产品设计阶段可靠性数据缺乏的问题,提出了一种基于区间灰色系统理论的可靠性综合分配法,对某系列卧式加工中心的可靠性指标进行分配。考虑复杂性、故障频繁性、技术水平、危害性和维修性5个影响可靠性分配的因素,结合专家经验和部分已知信息,采用基于区间分析理论的灰色关联分析法和熵权法确定其权重,然后根据综合灰色评估值对各子系统的可靠性指标进行分配,并与各子系统的实际故障统计情况作比较,验证了该方法的可行性和准确性。
Aiming at the factors influenced reliability allocation with uncertainty and the problems of lacking data during the early product design,a comprehensive reliability allocation method was pro-posed to allot the reliability index of a series of horizontal machining center based on the interval anal-ysis and grey system theory.Considering five factors such as the complexity,failure frequency,techni-cal level,harmfulness and maintainability that influenced allocation,combining with the expert experi-ences and some known informations,and using interval analysis,grey correlation analysis and entropy weight method their weights were determined.Finally,the reliability index of each subsystem was al-located according to the grey comprehensive evaluation value,and compared with the actual fault sta-tistics results,therefore,the feasibility and accuracy of the method were verified.