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Estimation method for service life of complex electromechanical system

A technology for electromechanical systems and life assessment, applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of complex system structure, high manufacturing cost, and lack of conditions for full-system testing, to overcome dependencies , the effect of verifying the correctness

Inactive Publication Date: 2015-05-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] Some large complex systems often do not have the conditions for full-system testing due to their complex system structure and high manufacturing costs. Therefore, the evaluation of their reliability indicators cannot be performed for long-term and large-scale statistical tests like components.

Method used

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  • Estimation method for service life of complex electromechanical system
  • Estimation method for service life of complex electromechanical system
  • Estimation method for service life of complex electromechanical system

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Embodiment Construction

[0038] In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention will be further explained in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] Such as figure 1 Shown is a flow chart of the complex electromechanical system service life evaluation method of the present invention, which specifically includes the following steps:

[0040] A: Analyze the structure and function of the system, determine the key components and important components of the system, establish a schematic diagram of the system's task functions, and make assumptions about the system's service life analysis and modeling based on the system's unique structural attributes;

[0041] B: Establish a dynamic success tree model of the system based on the function...

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Abstract

The invention discloses an estimation method for service life of a complex electromechanical system. According to the method, a success tree model of an event that operation is successfully completed by a system is firstly established from the view of system structure. Under data information conditions of fewer components, field practical data is fully combined to determine system basic components and life distribution thereof. According to engineering data, the life distribution parameter of each component is obtained by applying a variation coefficient method. According to the method, the dependency of the conventional method on mass data is overcome, and test data, design data, field data and engineer experience data are fully utilized and combined; the method is a completer and more effective method; on the basis that the life distribution and the distribution parameters of the system components are obtained, the average life of the system is estimated and verified from different views by applying a Bayesian network method and a Monte Carlo simulation method respectively, so that the service life of the entire complex electromechanical system is calculated.

Description

technical field [0001] The invention belongs to the technical field of system reliability analysis and service life assessment, and in particular relates to a method for reliability analysis and service life assessment of complex electromechanical systems. Background technique [0002] Modern electromechanical equipment is a multifunctional and complex electromechanical system integrating mechanical, electrical, optical, liquid, gas and other technologies. The internal relationship of the system is complex, consisting of hundreds of subsystems and tens of thousands of parts. System performance will directly affect the work efficiency of the whole product. Complex electromechanical systems have system characteristics such as uncertainty and nonlinearity; among them, nonlinearity means that system characteristics cannot be described by attribute linear models, which is the root cause of system complexity. Complex electromechanical systems have strict reliability requirements,...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 米金华李彦锋黄洪钟朱顺鹏刘宇付国忠杨圆鉴殷毅超张小玲
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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