Reliability evaluation method for performance degradation of spinning frame

Abstract

The invention discloses a reliability evaluation method for performance degradation of a spinning frame, and the method comprises the steps: firstly introducing three standards: sensitivity, relevancy and importance, extracting performance degradation parameters of the spinning frame, and constructing a comprehensive degradation index through the analysis of a fault mode of the spinning frame; establishing a performance degradation model based on a Wiener process by using the constructed comprehensive degradation index, and establishing a burst failure model by using Weibull distribution; and then, studying the dependency of sudden failure and degradation failure of the performance of the spinning frame, creating a dependent competitive failure model based on a Copula function, and accessing reliability of the spinning frame. According to the invention, reliability evaluation of the spinning frame is realized, and a new method is provided for better health management of the spinning frame.

Description

technical field [0001] The invention relates to mechanical equipment reliability technology, in particular to a reliability evaluation method for performance degradation of spinning frames. Background technique [0002] At present, the spinning frame is the key equipment for processing roving into spun yarn, the terminal machine in the yarn forming process, and the core equipment that determines the quality of yarn. Spinning frame is a kind of large-scale and complex electromechanical integration equipment, its internal structure is complex, involving many spare parts and key equipment special parts, and it has the characteristics of high reliability and long life. Taking a 1,200-spindle spinning frame as an example, it involves more than 60 key equipment components, 107,029 parts and more than 100 sensors (such as temperature, humidity, vibration, etc.). [0003] However, due to the alternation and interaction of various factors, the performance degradation of the spinning...

AI Technical Summary

Problems solved by technology

[0005]Comprehensive analysis of previous studies found that the theoretical research on the Wiener degradation process has made great progress, but neglected the equipment in the process of operation The impact of random factors on the life of the equipment will cause sudden failure of the spinning frame

Moreover, most of them use a single characterization parameter to characterize the equipment degradation trajectory, and the performance degradation status information of multiple indicators cannot be fully utilized.

However, for large and complex mechatronic equipment such as spinning frames, one degradation characterization parameter cannot comprehensively characterize the degradation process of the equipment

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