This paper proposes a condition-based maintenance approach for availability optimization problem. The system to be maintained is subject to stochastic degradations and assumed to be continuously monitored. Imperfect preventive maintenance actions are made on the basis of the hybrid hazard model and the condition to perform a preventive maintenance corresponds to a system reliability threshold. ...

In this paper we use an artificial immune optimization algorithm in conjunction with the universal generating function (UGF) to solve the preventive maintenance (PM) problem for multistate series-parallel system. In this work, we consider the situation where system and its components have several ranges of performance levels. Such systems are called multi-state systems (MSS). To enhance system ...

the microgrid concept provides attractive solutions for reliability enhancement of power distribution systems. normally, microgrids contain renewable-energy-based distributed generation (dg) units, which their output power varies with different environmental conditions. in addition, load demand usually changes with factors such as hourly and seasonal customer activities. hence, these issues hav...

in order to perform preventive maintenance (pm), two approaches have evolved in the literature. the traditional approach is based on the use of statistical and reliability analysis of equipment failure. under statistical-reliability (s-r)-based pm, the objective of achieving the minimum total cost is pursued by establishing fixed pm intervals, which are statistically optimal, at which to replac...

The great majority of the electric installations belong to the first and second category. In order to ensure a high level of reliability of their electric system feeder, two power supply sources are envisaged, one principal, the other of reserve, generally a cold reserve (electric diesel group). The principal source being under operation, its control can be ideal and sure, however for the reser...

This paper deals with preventive maintenance optimization problem for multi-state systems (MSS). This problem was initially addressed and solved by Levitin and Lisnianski [Optimization of imperfect preventive maintenance for multi-state systems. Reliab Eng Syst Saf 2000;67:193–203]. It consists on finding an optimal sequence of maintenance actions which minimizes maintenance cost while providin...

Aircraft is a system that requires high reliability levels throughout flights. Preventive maintenance procedures are applied to maintain this reliability at an optimum level. The higher frequency of preventive maintenance applications means higher reliability level; however, very frequent application of preventive maintenance is not economical though. In order to obtain optimum benefit, this ma...

In this paper, the problem of reliability-based periodic preventive maintenance (PM) planning for systems with deteriorating components has been considered. The objective is to maintain a certain level of reliability with minimal total maintenance related cost. In the proposed approach, the planning horizon is divided into pre-specified inspection periods. For any given interval, a decision mus...