关键词: 维护；系统服役年限；可靠性；零件替换率；维修成本

Abstract:

Based on the time-to-failure density function of parts, the average service life and reliability model having multi-distribution of mechanical and electronic systems undergoing maintenance were constructed. By means of numerical calculation and analysis of the reliability and replacement, the influence of the parameters of the time-to-failure density function, and the vary proportions of parts on the reliability for mechanical and electronic systems undergoing maintenance were investigated. It is significant to establish reasonable maintenance policies around the reliability and the design undergoing maintenance of mechanical and electronic systems.

Key words: maintenance；system service age；reliability；replacement rate；maintenance cost