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Mechanical components, systems and devices

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  • Mechanical and production engineering [2]
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Reliability and maintainability optimization of mechanical system based on the life cycle cost
Author(s): Wang Yuling, Li Fangyi, Yang Yong, Dong Zhengwen
Source: International Technology and Innovation Conference 2009 (ITIC 2009), 2009, p. 114 - 114
Type: ConferencePaper
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It would be good and necessary that studies be made of the reliability and maintainability of a mechanical system during its whole life cycle of which the cost is an important factor affecting the performance of a product. Compared with traditional researches given separately to reliability and maintainability, this paper, based upon a previous model for the analysis of the relationship of reliability and life cycle cost, is aimed at establishing a cycle cost model of which the target is to minimize the life cycle cost of a mechanical product. And an optimal integrated model of reliability and maintainability is developed which is expected to be suitable for general mechanical products. (4 pages)

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Hybrid graph disassembly model and sequence planning for product maintenance
Author(s): Wang Yuling, Li Fangyi, Li Jianfeng, Chen Jian, Jiang Feng, Wang Wenyuan
Source: International Technology and Innovation Conference 2006 (ITIC 2006), 2006, p. 515 - 519
Type: ConferencePaper
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Services are more and more important in the life cycle of products. Services are simply thought as effective compounding of maintenance and repair. In the course of maintenance and repair, disassembly is necessary. Disassembly is divided into full disassembly and selective disassembly, disassembly for services is mostly selective disassembly. How to optimize disassembly sequence, decrease disassembly time and cost are difficulty and key activity in services. In this paper hybrid graph model is developed. The contact constraint relationships of components are expressed by hybrid graph model. Three types of constraint relationship are defined. There are direct constraints among components, indirect constraints between constraints and components, indirect constraints between constraints and constraints. Disassembly sequence algorithm of target component is generated based on established hybrid model, and the complexity in creating the disassembly sequence is reduced. This algorithm is validated by an instance. The correctness of the model is indicated by the result.

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