Head of Fleet Performance (Maran Tankers Management Inc.)

Zoran Lajic

Zoran Lajic is the Head of Fleet Performance at Maran Tankers Management Inc. since June 2017. His accomplished engineering career reflects more than 20 years of experience in ship performance & energy efficiency and other areas. He spent most of his career in A.P. Moller – Maersk (Maersk Maritime Technology) as a General Manager / Lead Performance Analyst where he was involved in many performance and newbuilding projects.

He holds a PhD degree in Maritime Engineering from Technical University of Denmark.

Presentation Title:

“Auto-logged Vessel Performance Systems – Advanced methods (change & fault detection, multi sensor data fusion).”

A new adaptive GLR (generalized likelihood ratio) detector which is able to detect the stable periods of the operation of a vessel will been presented. To assess the performance of a vessel, the stable periods of navigation can be used only. Therefore, having only sensor measurements from the stable periods as the inputs to the system is crucial for proper functioning of an auto logged vessel performance monitoring system. Removing the “contaminated” signals by ship maneuvering, changes in the weather condition or vessel speed would lead to an increase of the reliability of the system. The results from two VLCCs (Very Large Crude Carrier) with high and low frequency data will be shown. Furthermore, the fault diagnosis as the first step of system transformation into a fault-tolerant system will been discussed. Fault diagnosis means that the existence of faults has to be detected and the faults have to be isolated. As an example, fault detection on the speed log (measurement of speed through the water) and GPS corrected speed (calculated speed through the water by combining the vectors of speed over ground and sea current) will be shown.

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