4.6 Article

Dynamic Analysis Method for Fault Propagation Behaviour of Machining Centres

Journal

APPLIED SCIENCES-BASEL
Volume 11, Issue 14, Pages -

Publisher

MDPI
DOI: 10.3390/app11146525

Keywords

machining centre; DSM; Copula function; fault propagation intensity; fault propagation behaviour

Funding

  1. Jilin Province Science and Technology Development Plan Project [20190302104GX]
  2. Jilin Provincial Natural Science Foundation [20170101212JC, 101832020DJX037]
  3. Graduate Interdisciplinary Research of Jilin University

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This paper presents a dynamic analysis method for fault propagation behavior of machining centers that integrates fault propagation mechanisms with model structure characteristics, establishes a fault propagation hierarchy structure model using design structure matrix (DSM), calculates fault influence degree, and constructs a fault propagation intensity model to analyze real-time fault propagation behavior, providing reference for fault maintenance and reliability growth of machining centers.
Fault propagation behaviour analysis is the basis of fault diagnosis and health maintenance. Traditional fault propagation studies are mostly based on a priori knowledge of a causality model combined with rule-based reasoning, disregarding the limitations of experience and the dynamic characteristics of the system that cause deviations in the identification of critical fault sources. Thus, this paper proposes a dynamic analysis method for fault propagation behaviour of machining centres that combines fault propagation mechanisms with model structure characteristics. This paper uses the design structure matrix (DSM) to establish the fault propagation hierarchy structure model. Considering the correlation of fault time, the fault probability function of a component is obtained and the fault influence degree of nodes are calculated. By introducing the Copula and Coupling degree functions, the fault influence degree of the edges between the same level and different levels are calculated, respectively. This paper constructs a fault propagation intensity model by integrating the edge betweenness and uses it as an index to analyze real-time fault propagation behaviour. Finally, a certain type of machining centre is taken as an example for specific application. This study can provide as a reference for the fault maintenance and reliability growth of a machining centre.

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