This paper presents a new health threshold used in the MACOL model guided by a non-overpass of a stress limit for a component according to its health condition and technical and economical feasibility. This new health threshold will help to reschedule the programmed maintenance in a dynamical form according to the life evolution of the industrial component analyzed. The core of this study is the analysis of the degradation rate of each significant wind turbine failure mode in order to determine the health limit and the moment when the risk of failure is high. In the case that this health limit is close to being reached, maintenance actions are suggested to be executed by the maintenance model in order to keep the levels of stress at a desired point. Some real examples of application of these new concepts in failure modes of a wind turbine will be described.
Keywords: Component life monitoring, anomaly detection, maintenance, component stress, normal behaviour models, wind turbine diagnosis.
2nd IFAC Workshop on Advanced Maintenance Engineering, , AMEST'2012, pag. 187-192, 22-23/11/2012 Sevilla,Espaņa
Published: November 2012.