Aligning PHM, SHM and CBM by understanding the physical system failure behaviour

In this work the three disciplines of condition based maintenance (CBM), structural health monitoring (SHM) and prognostics and health management (PHM) are described and the characteristics of the disciplines are compared. The three approaches are then demonstrated using three different case studies on bearing vibration monitoring, composite panel structural health monitoring and helicopter landing gear prognostics, respectively. After a discussion on the benefits of understanding the system (failure) behaviour, an integrated approach is proposed in which the three disciplines are aligned. This approach starts from defining an appropriate monitoring strategy and eventually leads to decision support in taking the decisions that lead to an optimal maintenance process throughout the life cycle of the asset.

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