Multi-state system dynamic reliability assessment method

A multi-state system, reliability technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to achieve accurate evaluation of system reliability and inability to achieve dynamic updates

Inactive Publication Date: 2013-11-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] So far, the research on the reliability evaluation of multi-state systems using the monitored state information is still blank at home and abroad, and the accurat

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  • Multi-state system dynamic reliability assessment method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] Such as figure 1 As shown, the multi-state system dynamic reliability evaluation method of the present invention includes steps: according to the multi-state system structure and the unit state, determine the unit state combination corresponding to each state of the system; collect the state information of the multi-state system during use; The information determines the state of the unit in the multi-state system; the multi-state system reliability for the remaining life is calculated based on the current unit state.

[0040] The multi-state system is composed of multiple units, and each unit has more than two discrete states. This discrete state describes all possible states of a unit from normal operation to complete failure, expressed as , where N l is the number of all possible states of unit l, s l,i represents the i state of c...

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Abstract

The invention discloses a multi-state system dynamic reliability assessment method. According to state information monitored by multi-state systems and constitution logic of units in the multi-state systems, current state probabilities of the units in the multi-state systems are calculated by building a Bayes recursive model, and therefore the state probabilities and reliability of the multi-state systems in the surplus service period are deduced. The method makes full use of the state information monitored by each system to update a reliability assessment model. Compared with an existing reliability assessment method, the multi-state system dynamic reliability assessment method can achieve the fact that more accurate and dynamically updated reliability assessment values of each system can be obtained, and therefore each system can be effectively prevented from losing efficacy, and more accurate maintaining strategies are generated in a guided mode.

Description

technical field [0001] The invention belongs to the technical field of reliability evaluation of complex systems, and in particular relates to a dynamic reliability evaluation method of a multi-state system. Background technique [0002] Reliability assessment techniques have been widely used. It helps engineers understand and master the life and health status of engineering systems. With the development of modern systems and equipment towards large-scale, complex and precise directions, and the gradual in-depth exploration of the failure mechanism and potential laws of the system, it is found that the failure evolution process of the system and its components during the life cycle is often It presents the characteristics of multi-state, and the failure law and mechanism, work performance and efficiency of each state are different. In this case, if the conventional two-state reliability theory is used to roughly divide the system into two states of "normal" and "failure", ...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 刘宇左明健黄洪钟汪忠来朱顺鹏肖宁聪李彦锋
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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