Study on equipment integrated health model with consideration of the effects of non-technical factors

Currently, equipment health condition assessment concentrates on the inherent health evaluated by monitoring of the data acquired by sensors, without consideration of the evolution of non-technical factors, and thus it is not comprehensive for representing the health condition of the machine In this paper, the factors of equipment health conditions are analyzed, and the concepts of “inherent health” and “integrated health” as well as their relationship are explored. According to its concept, in addition to technical factors, the integrated health depends on non-technical factors related to age, working conditions, and maintenance. Thus, by creating the proportional degradation model (PDM) and proportional health recovery model (PHR), and integrating a sequential imperfect maintenance policy, the integrated health model with consideration of the effects of non-technical factors was proposed, it can be used to health condition evaluating and maintenance-decision making. In case studies, obvious differences between inherent health and integrated health are expected to appear under certain circumstances.