基于多失效模式相关分析的技术特征综合配置方法

Technology feature comprehensive deployment method based on multi-mode correlation analysis

通过分析机械可靠性设计相关研究工作的研究成果与不足,提出新的基于可靠性功能配置的技术特征配置方法。该方法利用可靠性功能配置的矩阵分解结构描述失效发生机理、软失效和硬失效模式三者之间的复杂关联关系。从考虑零部件多失效模式相关性的角度,提出各失效模式对零部件整体造成的可靠性损失的定义,并建立了可靠性损失的分析与计算模型。按可靠性损失的大小将零部件可靠性指标值分配给各个失效模式。在可靠性指标值分配基础上,利用逆可靠度法求解零部件技术特征值。以加工中心传动系统的研发为例,说明了所提方法的可行性和有效性。

By analyzing the achievements and shortages of related research works on mechanical reliability design, a novel method of technical characteristics deployment based on Reliability Function Deployment （RFD） was put forward. The matrix decomposition structure of RFD was used to described the correlative relations between the failure mechanisms, the soft failures and the hard failures. By considering the correlation of parts＇ multiple failure modes, the reliability loss of failure mode to whole part was defined, and a calculation model for reliability loss was presen- ted. According to the reliability loss scale, the reliability index value of whole part was allocated to each failure mode. Based on the allocation of reliability index value, the inverse reliability method was employed to acquire the values of technology characteristics. The feasibility and validity of proposed method were illustrated by a develop- ment case of machining center＇s transmission system.