Method for reliability modeling and evaluation of dynamic cascade coupling electromechanical system

Abstract

The invention provides a method for reliability modeling and evaluation of a dynamic cascade coupling electromechanical system. The method is based on a physical background of a complex electromechanical system and is capable of carrying out research on reliability of the electromechanical system based on a dynamics response model, and an established reliability network model of the electromechanical system is capable of more accurately describing the characteristics of dynamic, cascading and coupling of the complex electromechanical system, so that reliability of the electromechanical system, which is obtained based on the network model, is more accurate and credible; meanwhile, by utilizing a method of combining dynamics analysis and uncertainty analysis, transfer of uncertain information from a bottom layer to a top layer of the network model is described, and the difficulties that an aerospace mechanism system has a response uncertainty character and system reliability information cannot be obtained through experiment measures due to large experimental expenses, long period, large technical difficulty and expensive product cost are solved.

Description

technical field [0001] The invention belongs to the technical field of reliability, and in particular relates to a reliability modeling and evaluation method of a dynamic cascade coupling electromechanical system. Background technique [0002] Most complex electromechanical systems operate in a complex service environment, the system behavior is closely related to the physical background, the performance of the system gradually deteriorates during service, and the damage of parts and components continues to develop under the continuous action of environmental loads, showing time-varying and polymorphic characteristics; the internal level of the system Complex, with the characteristics of upper and lower cascading between layers, and mutual coupling between units and factors in a layer; system faults present multiple fault mechanisms, multiple fault modes interact and compete, and the interaction and competition relationship presents Dynamically changing features. The dynami...

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Problems solved by technology

However, the above methods are all based on the idea of ​​event occurrence probability statistics, the use of deterministic information is insufficient, and the combination with the physical background is not close

At present, the research on the reliability modeling and analysis methods of complex electromechanical systems still lacks the support of a mature theoretical system. What is more serious is that certain functional mutations, performance degradation, fault evolution and emergence of complex electromechanical systems are difficult to solve in reliability modeling. Perform accurate analytical expressions with the analysis process

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