Research on criticality analysis method of CNC machine tools components under fault rate correlation

International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料科学

Gui-Xiang, Shen^1 ; Xian-Zhuo, Zhao^1 ; Zhang, Ying-Zhi^1 ; Chen-Yu, Han^1

School of Mechanical Science and Engineering, Jilin University, Changchun

130000, China^1

关键词: Adjacency matrices;    CNC machine tools;    Criticality analysis;    Fault correlation;    Fault mechanism analysis;    PageRank;    PageRank algorithm;    Reliability assurance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/307/1/012023/pdf
DOI  :  10.1088/1757-899X/307/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to determine the key components of CNC machine tools under fault rate correlation, a system component criticality analysis method is proposed. Based on the fault mechanism analysis, the component fault relation is determined, and the adjacency matrix is introduced to describe it. Then, the fault structure relation is hierarchical by using the interpretive structure model (ISM). Assuming that the impact of the fault obeys the Markov process, the fault association matrix is described and transformed, and the Pagerank algorithm is used to determine the relative influence values, combined component fault rate under time correlation can obtain comprehensive fault rate. Based on the fault mode frequency and fault influence, the criticality of the components under the fault rate correlation is determined, and the key components are determined to provide the correct basis for equationting the reliability assurance measures. Finally, taking machining centers as an example, the effectiveness of the method is verified.