Symbolic multi-quality-characteristic analysis method based on relative entropy and grey relational degree

Abstract

The invention discloses a symbolic multi-quality-characteristic analysis method based on relative entropy and the grey relational degree. The method comprises the steps that starting from the system function structure and fault mode and influence factors, system quality characteristics are extracted, a multi-quality-characteristic research system is determined, and system quality characteristic data sequences are collected; the system quality characteristic data sequences are symbolized by adopting an equal probability symbolization method to obtain a corresponding symbolic sequence space; the probability distribution characteristics of all quality characteristic sequences are researched, and a symbol sequence frequency statistical histogram is obtained; the problem that system quality characteristics have correlation and nondeterminacy in actual engineering is considered, symbol dynamics relative entropy and the grey correlation analysis method are adopted for carrying out qualitative characterization on the coupling correlation between the quality characteristic symbolic sequences from the perspectives of difference and similarity, and finally expression of the correlation and nondeterminacy of the original mass characteristic data sequences is achieved.

Description

technical field [0001] The invention belongs to the technical field of system reliability analysis and life evaluation, and specifically relates to the design of a symbolic multi-quality characteristic analysis method based on relative entropy and gray relational degree. Background technique [0002] Complex mechanical and electrical products are complex systems that are organically combined with mechanical structures, electrical equipment, control devices, and detection devices. Specifically, complex electromechanical products are complex systems with overall functions integrated by multi-unit technologies such as mechanics, electricity, and hydraulics. A class of complex products. The quality characteristics of complex electromechanical products cover a wide range, including not only general characteristics such as reliability, usability, and precision, but also characteristics such as accuracy retention and appearance. Generally speaking, various quality characteristics...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of lack of prediction and modeling of multi-quality characteristic process in the prior art, and propose a symbolic multi-quality characteristic analysis method based on relative entropy and gray correlation degree

Images