Abstract
Inspection optimization model with imperfect maintenance based on a three-stage failure process
Highlights
Rolling element bearings are widely used in industrial rotating machinery, for example wind turbine and helicopter; and they are considered as a type of critical components
The lubrication problem in Preventive maintenance (PM) models based on the delay time concept has been presented by Wang [21], which considered integratedly the routine service (RS), inspection, condition monitoring and preventive replacement
Since it is assumed that imperfect maintenance is applied when the system is found to be in the minor defective stage, we introduce the proportional age reduction (PAR) model firstly
Summary
Rolling element bearings are widely used in industrial rotating machinery, for example wind turbine and helicopter; and they are considered as a type of critical components. Wang et al [23] further extended the work [16] by considering a two-level inspection policy with PM and delaying the maintenance once the severe defective stage is identified and the time interval to the PM is less than a threshold level. The lubrication problem in PM models based on the delay time concept has been presented by Wang [21], which considered integratedly the routine service (RS), inspection, condition monitoring and preventive replacement. The lubrication is only implemented when the bearing is identified to be in the minor defective stage in the industry, rather than a part of inspection, or of repair or replacement. The inspection model considering imperfect maintenance based on the three-stage failure process is closer to reality but not developed.
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