Cost Optimization of Maintenance Scheduling for Wind Turbine Gearbox Components with Assured Reliability

Shawki A. Abouel-seoud¹ and Mohamed I. Khalil^1,

¹Automotive Engineering Department, Helwan University, Cairo, Egypt

Cite this paper:
Shawki A. Abouel-seoud and Mohamed I. Khalil. Cost Optimization of Maintenance Scheduling for Wind Turbine Gearbox Components with Assured Reliability. World Journal Control Science and Engineering. 2013; 1(1):25-34. doi: 10.12691/wjcse-1-1-4

Abstract

The operation of a particular component in deteriorating condition will lead to a high machine downtime. This is due to the failure of component at unexpected time. As a result it will increase cost of maintenance and production lost. One of the solutions to this matter is to use Preventive Replacement (PR). PR is one of the maintenance optimization strategies that can balance the failure cost in unexpected time (maintenance and production lost) and maintenance benefits (minimize downtime) for a deteriorating component. Therefore, the objective of this paper is to introduce the PR strategy for determining an optimal replacement time for component that deteriorates over time. The models are used for the cost per unit time based on the stochastic behavior of the assumed system. The model reflects the cost of storing a spare as well as the cost of system downtime. The minimum-cost (optimum) policy time is calculated with the consideration of availability. It is noted that all maintenance cost results converge to the optimal value of the age replacement policy which has the same configuration when inspection interval increases.

Keywords:
maintenance preventive maintenance availability limit maintenance cost optimization replacement policy

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