关键词: 性能衰退, 多态系统, 可靠性分析, 机床

Abstract: According to the performance polymorphism of the repairable multi-state system,a multi-state reliability modeling method in a maintenance cycle based on the performance degradation was proposed by using the analysis method from machine to system.A Markov model of machine performance degradation was established,and the different ways of machine status from high-performance to low-performance was analyzed.Meanwhile,the functional relationship between state probability and decline ways was obtained.The state probability and Universal Generating Function (UGF) were combined to analyze the states during the performance degradation process.According to the different factors affecting system performance recession,the manufacturing system was divided into different levels.Combined with fuzzy analytic hierarchy process,the relationship between the subsystems and system was analyzed and the generating functions were obtained.Furthermore,the reliability analysis method of performance degradation due to the aging was derived.A case was taken as an example to verify the effectiveness of the proposed model and the analysis method.

Key words: performance degradation, multi-state system, reliability analysis, machine tools