Dipartimento di Ingegneria informatica, automatica e gestionale

The decay of a single component in a naval propulsion system can affect the performance of the entire system, involving expensive maintenance costs for restoring efficient conditions. Therefore, a regular control of the decay of key components of these systems is essential for properly handle maintenance actions. Moreover, in naval propulsion systems it is necessary to consider the difficulty in implementing an onboard maintenance action or returning a vessel. Two relevant components in naval propulsion systems are the turbine and the compressor. This study develops two machine learning models to predict turbine and compressor decay, i.e. based on classification and regression approaches. The former classifies whether the components are decayed or not, thus highlighting a state of criticality, the latter predicts a specific value of each decay coefficient. For each approach, different algorithms are compared, e.g. boosted trees, linear regression or support vector machines. A case study considering sixteen inputs has been used to test the effectiveness of the proposed solution, starting from a dataset of about twelve thousand instances referred to a naval vessel. A sensitivity analysis of relevant parameters has been developed to verify the robustness of the approach.