Evaluation on the Readiness Ratio and Mission Reliability of Intelligent Ships Based on the Integrated PHM System Design

Prognostic and health management (PHM) system is adopted in intelligent ships (ISs) to provide predictive maintenance decision support. However, most existing works only focus on monitoring one device with single signal. Furthermore, after PHM-based ISs are designed, quantitative evaluation method for verifying the performance improvement of ISs is limited. Considering these two problems, an integrated framework of multi-device and multi-signal PHM design based on three levels is developed for ISs. And a performance evaluation model in terms of readiness ratio and mission reliability is proposed based on the decision tree. Finally, a real case of a special purpose ship (SPS) is presented to illustrate the proposed evaluation method and demonstrate the effectiveness of the integrated PHM design by comparing to the conventional SPS.