마르코프 프로세스를 활용한 시스템 가용도 분석 방법 고찰A Study on System Availability Analysis Utilizing Markov Process
- Other Titles
- A Study on System Availability Analysis Utilizing Markov Process
- Authors
- 김보현; 김성경; Pagulayan Dhominick; 허장욱
- Issue Date
- 2016
- Publisher
- 한국신뢰성학회
- Keywords
- Availability; Markov Process; Tablet PC; Spare; Failure Rate; Repair Rate
- Citation
- 신뢰성 응용연구, v.16, no.4, pp.295 - 304
- Journal Title
- 신뢰성 응용연구
- Volume
- 16
- Number
- 4
- Start Page
- 295
- End Page
- 304
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/19157
- ISSN
- 1738-9895
- Abstract
- Purpose: This paper presents an application of Markov Process to reliability and availability analysis. In order to do that of analysis, we set up a specific case of Tablet PC and it’s usage scenario. The case has it some spares and maintenance and repair processes.
Methods: Different configurations of the tablet PC and as well as their functions are defined. The system configuration and calculated failure rates of components are modeled from Windchill Quality Solution. Two models, without a spare and with spare, are created and compared using Markov Process. The Matlab numerical analysis is used to simulate and show the change of state with time. Availability of the system is computed by determining the time the system stays in different states.
Results: The mission availability and steady-state condition availability in accordance with the mission are compared and the availability of the system with spares have improved availability than without spares. Simulated data shows that downtime of the system increased which results in greater availability through the consideration of spares.
Conclusion: There’s many techniques and methods to do reliability and availability analysis and mostly are time-independent assumptions. But Markov Process, even though its steady-state and ergodic properties, can do time analysis any given time periods.
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