Remaining useful life assessment of machine tools based on AHP method and Euclid approach degree

The purpose of this paper is to evaluate remaining useful life (RUL) of machine tools, which is a key indicator for equipment maintenance and health management. The proposed method takes the factors of reliability, maintainability and economy into account and constructs the evaluation index system based on analytical hierarchy process (AHP) method. Euclid approach degree is then calculated through the fuzzy matter-element model in order to assess the health condition and determine RUL. An application example of a heavy-duty machine tool is provided to demonstrate the feasibility in engineering practice, results that are compared with fuzzy comprehensive evaluation and grey relational analysis illustrate the reliability and accuracy of the method.