Prognosis of remaining bearing life using neural networks

A new concept referred to as progression-based prediction of remaining life (PPRL) is proposed in the present paper in order to solve the problem of a ccurately predicting the remaining bearing life. The basic concept behind P PRL is to apply different prediction methods to different bearing running s tages. A new prediction procedure which predicts precisely the remaining be aring life is developed on the basis of variables characterizing the state of a deterioration mechanism which are determined From on-line measurements and the application of PPRL via a compound model of neural computation. Th e procedure consists of on-line modelling of the bearing running state via neural networks and logic rules and not only can solve the boundary problem of remaining life bur also can automatically adapt to changes in environme ntal factors. In addition, multi-step prediction is possible. The proposed technique enhances the traditional prediction methods of remaining bearing life.