臺灣博碩士論文加值系統

本研究探討串並聯系統元件受到相依多重競爭失效因素之影響，元件除了會受到一般退化外，還會受到無法預測之隨機衝擊，隨機衝擊會造成直接失效或加速一般退化之退化程度，且為了管理上的方便，實施週期性預防保養策略，並考量保固期與最小維修等相關成本，在期望成本最小化的目標下，找到串並聯系統最佳化的配置設計與最適當的保固期內之預防保養次數。
本研究建構模式幫助廠商分析可靠度與系統架構配置，以總成本最小化為目標，研擬出最適合之預防保養次數，並推算預防保養時間間隔與排程，提供廠商一週期性預防保養策略，最後透過數值範例來說明本研究所提出之預防保養模型，從數值範例可以知道預防保養次數與系統總成本、系統可靠度之間的關聯性，再由失效門檻值、隨機衝擊發生頻率以及保固期結束時系統要求之可靠度三方面進行敏感度分析，了解各個參數與決策變數之間的相關性與強弱程度，結果顯示採用較高的軟失效門檻值或是降低系統在保固期結束時所要求之可靠度能夠降低成本，而隨機衝擊發生的頻率高低對於成本方面影響則較不顯著，提供製造商在進行預防保養決策時，能夠更了解相關資訊。

This study develops a reliability model with preventive maintenance policy for the series-parallel system subject to Multiple Dependent Competing Failure Processes. The model incorporates periodic preventive maintenance, warranty, and minimal repair in the design of system configuration. The expected total cost is minimized to determine the optimal number of preventive maintenances during the warranty period, and the optimal system configuration. A numerical example is solved by LINGO14 to demonstrate the application. This model can also be applied directly to other series-parallel system that experience multiple dependent competing failure processes.

目錄
摘要.i
Extended Abstract.ii
誌謝.vi
目錄.vii
圖目錄.ix
表目錄.x
第一章 緒論.1
1.1 研究動機與目的.2
1.2 研究範圍.3
1.3 研究架構與流程.4
第二章 文獻探討 5
2.1 串並聯系統介紹.5
2.2 失效模式.7
2.2.1 單一失效模式.8
2.2.2 多重競爭失效模式.8
2.2.3 相依多重競爭失效模式.9
2.3 預防保養策略.11
2.3.1 預防保養之概念.11
2.3.2 週期性預防保養.12
2.3.3 非週期性預防保養.13
2.4 小結.15
第三章 失效模式之預防保養.16
3.1 問題描述.16
3.2 研究架構.19
3.3 研究步驟.22
3.4 模式建構.23
3.4.1 相依多重競爭失效模式.23
3.4.2 成本分析.26
第四章 數值範例與分析.31
4.1 數值範例.31
4.2 敏感度分析.35
4.2.1軟失效門檻值與最佳週期性預防保養策略之分析.36
4.2.2隨機衝擊發生頻率與最佳週期性預防保養策略之分析.37
4.2.3保固期結束時系統可靠度與最佳條件式預防保養策略之分析.39
第五章 結論與建議.42
5.1 研究結論.42
5.2 研究限制.43
5.3 未來方向.43
參考文獻.45

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