Abstract
For engineering and production systems, due to the structural dependence between components, the disassembly operation caused by the replacement of components will affect the failure and degradation processes of other components in the system. In order to optimize the extended warranty (EW) cost of the multi‐component system with structural dependence, this paper described the structural dependence and modeled the disassembly operation impact, and then the failure rate model of the component considering the impact of disassembly operation under EW was developed. Combined with the actual situation, a condition-based maintenance (CBM) strategy was employed to construct the EW cost model of the multi‐component system with structural dependence. Monte Carlo simulation was proposed to determine the optimal EW cost of the system and the optimal periodic inspection interval of the CBM strategy. Finally, a numerical example of the planetary gear train of an automobile generator is introduced to demonstrate the feasibility and advantages of the proposed model in EW cost optimization and the analysis of disassembly operation impact on the optimal maintenance strategy.
Highlights
To construct the failure rate model of the component under extended warranty (EW), the description of disassembly operation and the modeling of disassembly operation impact are presented under the logical framework in Section 2. en, we develop a condition-based maintenance (CBM) strategy for the multicomponent system based on periodic inspection and reliability threshold
We investigate the CBM strategy with a periodic inspection interval for the multi-component system with structural dependence under extended warranty, taking into account the impact of disassembly operation on the failure rate of the system due to the structural dependence
En, the disassembly operation is described and the disassembly operation impact is modeled to develop the failure rate model considering the impact of disassembly operation under EW. is study proposed the preventive replacement and opportunistic preventive replacement strategy in order to better fit the actual situation where the overall trend of component failure rate is rising. e presented model is applied for maintenance cost optimization of the planetary gear train of an automobile generator
Summary
In the above studies, there is no literature to carry out EW decisionmaking research for multi-component systems structural dependence considering the impact of disassembly operation. The previous research seldom involves the impact of disassembly operation due to the structural dependence between components on maintenance optimization modeling and failure process [30]. En, we develop a CBM strategy for the multicomponent system based on periodic inspection and reliability threshold A numerical example is given in Section 4 to illustrate the impact of disassembly operation and obtain the optimal maintenance strategy with the lowest EW cost of the multi-component system with structural dependence under EW using the Monte Carlo simulation.
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