关键词: 可靠性分配, 灰色理论, 区间分析, 熵权 , 数控加工中心

Abstract:

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 proposed to allot the reliability index of a  series of horizontal machining center based on the interval analysis and grey system theory.Considering  five factors such as the complexity,failure frequency,technical level,harmfulness and maintainability that influenced allocation, combining with the expert experiences 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 allocated according to the grey comprehensive evaluation value, and compared with the actual fault statistics results,therefore,the feasibility and accuracy of the method were  verified.

Key words: reliability , allocation;grey , theory;interval analysis;entropy , weight;CNC machining center