An advanced and sophisticated algorithm based on a physical and data driven engine model promises to enhance predictive maintenance for marine two-stroke engines.
It has been developed by Swiss technical university ETH Zürich and WinGD (Winterthur Gas & Diesel Ltd) and uses a new hybrid approach to modeling engine behavior. It will now be further tested and validated to be applied in future versions of the WinGD Integrated Digital Expert (WiDE) engine data analytics system.
WiDE diagnostics are currently being piloted on WinGD engines in operation and were made available for all new WinGD engines ordered as of the beginning of 2018. It uses machine learning and modeling based on performance benchmarking and sensor data to detect and predict failures. The system developed with ETH Zürich uses a new approach to modeling engine behavior that combines this data-driven engine modeling with physical modeling.
While data-driven models use condition monitoring or rules derived from experiments, physical modeling relies on complex simulations that can be time-consuming and costly. To match WiDE’s purpose of providing instant, online diagnostics the system will apply a thermodynamic model that takes just milliseconds to calculate.
Hybrid modeling will improve WiDE’s ability to predict and prevent engine failures, cutting downtime and maintenance costs for ship owners and operators. ETH Zürich is collaborating with NASA to validate the performance of the algorithm on turbofan engines. The algorithms have demonstrated superior performance for the prediction of the remaining useful lifetime compared to pure data-driven approaches.
“Tests with WinGD as well as with NASA’s data sets showed that we are more accurate on detecting failures than standard approaches,” said ETH Zürich Researcher Manuel Arias Chao. “Furthermore, we can differentiate between different types of failures.”
Carmelo Cartalemi, General Manager Business Development, WinGD said: “The first iteration of our WiDE system brought remote diagnostics and predictive maintenance to marine two-stroke engines. The project with ETH Zürich will increase the predictive maintenance capability of WiDE to a level not yet seen in our industry.”
The WiDE platform, created in cooperation with software provider Propulsion Analytics and automation and communication specialist Enamor, was introduced last year. In April, WinGD and ExxonMobil announced a project to integrate advanced cylinder condition monitoring into WiDE.