Volume 38, Number 6, December 2020
|Page(s)||1316 - 1321|
|Published online||02 February 2021|
Reliability Guarantee Strategy for Complex System Based on Cost-Benefit Importance
School of Mechanical Engineering, Xi'an Aeronautical University, Xi'an 710077, China
2 School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
3 Key Laboratory of Modern Measurement and Control Technology of Ministry of Education, Beijing Information Science and Technology University, Beijing 100192, China
In order to ensure the long-term stable and economic operation of complex system, the system operation process is described and the problems is solved, and a system reliability model and an optimization model for component replacement are constructed. Based on the theory of marginal utility and importance measures, a reliability guarantee strategy for complex system based on cost-benefit importance is presented, which aims to find a component preventive replacement sequence with minimum maintenance cost on the constraints of system reliability lower threshold and running time. When the system reliability drops to a preset threshold, the cost-benefit importance of each component is calculated, the component with the greatest cost-benefit importance to replace is selected, and then iterate until the operation task is completed to form an optimal component replacement sequence. The feasibility of the present strategy is verified by taking a complex system which can be equivalent to a series-parallel system as an example. The present strategy has certain reference significance of ensuring the reliable operation of some high-end equipment safety-critical systems.
Key words: complex system / reliability guarantee / cost-benefit importance / marginal utility / preventive replacement
关键字 : 复杂系统 / 可靠性保障 / 成本效益重要度 / 边际效应 / 预防更换
© 2020 Journal of Northwestern Polytechnical University. All rights reserved.
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