Modeling age-based maintenance strategies with minimal repairs for systems subject to competing failure modes due to degradation and shocks

Abstract

International audienceThis paper deals with maintenance strategies with minimal repairs for single-unit repairable systems which are subject to competing and dependent failures due to degradation and traumatic shocks. The main aims are to study different approaches for making a minimal repair decision (i.e. time-based or condition-based) which is a possible corrective maintenance action under the occurrence of shocks, and to show under a given situation which approach can lead to a greater saving in maintenance cost. Two age-based maintenance policies with age-based minimal repairs and degradation-based minimal repairs are modeled, and their performance is compared with a classical pure age-based replacement policy without minimal repairs. Numerical results show the cost saving of the maintenance policies and allow us to make some conclusions about their performance under different situations of system characteristic and maintenance costs. It is shown that carrying out minimal repairs is useful in many situations to improve the performance of maintenance operations. Moreover, the comparison of optimal maintenance costs incurred by both maintenance policies with minimal repairs allows us to justify the appropriate conditions of time-based minimal repair approach and condition-based minimal approach

An opportunistic condition-based maintenance policy for offshore wind turbine blades subjected to degradation and environmental shocks

“…see [16][17][18][19][20][21]) and the multi-unit systems have received very limited attention. Moreover, only a few number of papers deal with joint modeling and simultaneous optimization of degradation thresholds as well as operational age (see [22,23]).…”

Reliability estimation of a production system subject to condition monitoring with two modes of failures

“…Huynh et al (2012); Wang and Zhang (2013); Zhu et al (2010)) and only limited number of papers have been developed considering multiple failure modes in the presence of the CM information. For instance, maintenance model with multiple failure modes with CM data was developed in Liu et al (2013) for continuously monitored degrading systems.…”

Joint optimisation of buffer size and preventive maintenance for a deteriorating upstream machine

“…Since Abdel-Hameed (1975) first proposed to use gamma process as a model for deterioration occurring randomly in time, a great number of maintenance models based on gamma process have been introduced and studied in the literature, which include time-based and condition-based preventive maintenance (see Berenguer, Grall, Dieulle, & Roussignol, 2003;Castro, Barros, & Grall, 2011;Huynh, Barros, Berenguer, & Castro, 2011;Huynh, Castro, Barros, & Berenguer, 2012;Noortwijk, 2009;Pandey & Yuan, 2006, for a review). A common assumption made in the maintenance models based on gamma process is that the maintenance actions can restore the system to the as good as new state, i.e., the maintenance is perfect.…”