基于历史数据修正系数的可靠性分配方法

Reliability allocation method based on correction coefficient and historical data

针对传统可靠性分配方法过分依赖历史数据或专家经验,以及对复杂机械系统进行可靠性分配时与实际生产制造过程不匹配两类问题,提出一种基于历史数据修正系数的可靠性分配方法。在改进的方法中,在分配流程上引入了系统部件隶属性矩阵,并在分配方法上提出了考虑新研产品特性的历史数据修正系数。为了证明改进方法的有效性,以某型液力机械综合传动系统为研究对象来进行可靠性指标分配。结果表明,改进的分配方法能够充分考虑历史故障数据和新研产品特性两类分配信息,同时能够有效避免传统方法中“自上而下”的分配流程与生产过程相脱离的情况。

In order to solve the two problems of traditional reliability allocation methods that excessively rely on historical data or expert experience,and that the reliability allocation of complex mechanical systems does not match the actual manufacturing process,a reliability allocation method based on historical data correction coefficient is proposed.In the improved method,the subordinate attribute matrix of system components is introduced in the allocation process,and the historical data correction coefficient considering the characteristics of newly developed products is proposed in the allocation method.To demonstrate the effectiveness of the improvement method,a certain type of hydraulic mechanical comprehensive transmission system is taken as the research object to allocate reliability indicators.The results show that the improved allocation method can fully consider the historical fault data and the characteristics of newly developed products,and can effectively avoid the separation of the“top-down”allocation process from the production process in the traditional method.