Abstract
With the development of science and technology, the structure of engineering system has become increasingly large and complex. In order to ensure the safety and stability of the system in operation, the reliability evaluation of complex system has become an important research field. However, previous studies on the reliability of multi-state systems did not take into account the multi-level performance sharing in the system, and it has been unable to accurately assess the reliability of such complex systems. Therefore, based on the actual engineering system, this paper proposes a multi-state system with multi-level performance sharing mechanism. On this basis, we established a system reliability evaluation model using universal generating function technique. Through numerical examples, the application of the model and analyze the influence of different parameters on system reliability are demonstrated. In addition, we also use genetic algorithm to optimize the allocation of components in the system, so as to improve the reliability of the system. Different from the previous studies on system reliability with common bus performance sharing, the system proposed in this study is more general.
Highlights
At present, in this era of rapid development of science and technology, the modernization level of industrial production is gradually improving
SYSTEM RELIABILITY EVALUATION MODEL The universal generating function (UGF) technique is a method of representing the probability distribution of multi-state system performance, which is widely used in the research of reliability analysis
Different from the previous research on system reliability with common bus performance sharing, the system model established in this paper has universal applicability and can calculate the reliability of any layer of system in practical application
Summary
In this era of rapid development of science and technology, the modernization level of industrial production is gradually improving Under this development trend, various engineering systems have gradually become huge and complex, showing the characteristics of multi-state and performance sharing, especially in power, communication, computer, intelligent transportation and other systems abound with high techniques [1,2,3,4,5,6]. This paper proposes a reliability evaluation model for multi-state system that comprehensively considers multi-level performance sharing and transmission loss. The model is constructed based on the universal generating function (UGF) technique, which is widely used to establish the reliability evaluation model of the multi-state system since it is flexible and effective in studying systems with multiple states and complex structures [28].
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