关键词: 串行多工序制造系统, 质量, 可靠性, 预防维护, 变工况, 维护时间窗

Abstract: Aiming at the serial multi-stage manufacturing systems under variable working conditions,the evolution mechanism of equipment hazard rate was proposed by considering historical working conditions,which was followed by an improved proportional hazard model for equipment under variable working conditions.Besides,a valid-time-centered equipment maintenance model was built to integrate product quality and equipment reliability on the basis of impact mechanism of equipment degradation on product quality.Based on semi-dynamic time windows,a system opportunity maintenance strategy was proposed to take the influence of short-term certain working conditions on equipment degradation into account while the long-term working conditions were fuzzy.The illustrative example showed that compared with traditional static time window,semi-dynamic time window was more suitable for the serial multi-station manufacturing system under variable working condition,and it had more advantages with great changing of working condition.

Key words: serial multi-stage manufacturing system, quality, reliability, preventive maintenance, variable working condition, maintenance time window