考慮虛擬年齡與利用率之最佳不完美維護策略

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姓名

楊人旭(Jen-hsu Yang) 查詢紙本館藏

畢業系所

工業管理研究所

論文名稱

考慮虛擬年齡與利用率之最佳不完美維護策略
(Optimal policy for imperfect maintenance system with consideration of virtual age and utilization)

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摘要(中)

本論文的主要目的是建立一不完美維護模式，結合在虛擬年齡與利用率下之最佳維護策略，而使得總成本最小。
本論文以Liu et al. (1995)的概念為基礎，除了虛擬年齡外，系統的利用率也會影響系統的失敗率，其中利用率是一個隨機過程且具有馬可夫性質，所以是一馬可夫鏈。在此假設下，我們考慮在一有限時間內運用動態規劃法求得最佳的維護區間，並且依據不同的利用率探討維護區間的變化。

摘要(英)

The main objective of this thesis is to construct an imperfect maintenance model, which combines virtual age and utilization, for determining the optimal policy to minimize the total cost.
The concept of our virtual age function is based on Liu, Makis and Jardine (1995). However, we add a variable, utilization rate here which is different from the original concept. The utilization rate is a stochastic process with Markov property, so the stochastic process is a Markov chain. The restoration degree and utilization of the system are both assumed to influence the failure intensity following a virtual age process. In this situation, we finally use dynamic programming to find the optimal overhaul intervals with finite planning horizon, and show how it varies with alternation of utilization.

關鍵字(中)

★ 利用率
★ 修理
★ 維護
★ 虛擬年齡

關鍵字(英)

★ Repair
★ Virtual age
★ Maintenance
★ Utilization

論文目次

中文摘要 i
Abstract ii
Content iii
List of Figures iv
List of Tables v
1. Introduction 1
1.1 Background and motivation 1
1.2 Research objective 1
1.3 Research framework 2
2. Literature Review 4
2.1 Definition of maintenance 4
2.2 Maintenance classification 4
2.3 The virtual age method 8
2.4 Utilization 9
3. The Model 10
3.1 Model assumptions 10
3.2 The virtual age function 12
3.3 The maintenance model and notations 13
4. Numerical Study 16
4.1 Data setting 16
4.2 Numerical analysis 16
4.3 Sensitive analysis 17
5. Conclusion and Future Research 25
5.1 Conclusion 25
5.2 Future research 25
Reference 26

參考文獻

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[13] Nakagawa, T. (1988), “Sequential Imperfect Preventive Maintenance Policies,” IEEE Trans Reliability, 37, 295–8.
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[19] Wang, H. (2002), “A Survey of Maintenance Policies of Deteriorating Systems,” European Journal of Operational Research”, 139, 469–489.

指導教授

葉英傑(Ying-chieh Yeh)

審核日期

2010-7-5

推文