| Summary: | 碩士 === 元智大學 === 工業工程與管理學系 === 104 === System reliability plays a key role in both military and industrial applications. With the progress of the times, the complexity of modern technological products and systems are increasing, as well the requirements for system reliability. The high-reliability products are often subject to complicated designs. Therefore, the series-parallel system structure is popularly employed at the stage of the product design to enhance the system reliability. However, the series-parallel system design is often limited to cost and weight constraints, so fail to reach practical requirements due to the limitation of quantity and quality of the redundant components. Past studies focused mainly on the redundancy allocation of series-parallel systems, but lack of the discussion of redundancy strategies among subsystems. Redundancy strategies include active, cold standby, or warm standby.. Thus, this study aims at determining the optimal design of the series-parallel system configurations with a choice of redundancy strategies and the allocation of the redundancy components.
This research hopes to provide an efficient and effective design method by proposing a metaheuristic algorithm － variable neighborhood search, considering system reliability maximization with accordance to the system cost and weight restrictions. The proposed algorithms are run using two test suites and compared with methods in the literatures. The results show that the proposed algorithms perform very well in both quality and computational effort. It also indicates the simultaneous consideration of three redundancy strategies help to enhance the system performance.
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