connecting marine engineering, hydromechanics and controls
My name is Arthur Vrijdag and I started AVR Maritime in 2020. Let me introduce myself:
I started my maritime career in the Royal Netherlands Navy and was trained as an officer of the watch at the Royal Netherlands Naval College in Den Helder (currently Netherlands Defence Academy or NLDA).
During my time onboard I became fascinated by the interaction between operator, the ship (propulsion) systems including its controls and the maritime environment in the shape of wind and waves. This fascination led me to obtain an MSc degree in ship hydromechanics and later on, in 2009, a PhD degree in advanced ship propulsion control, again focussing on the interaction between machinery, propulsion controls and hydromechanics of naval ships. Extensive simulation studies, Hardware-In-the-Loop (HIL) activities as well as full-scale trials with advanced experimental propulsion control systems were part of the project. Results are publicly available as shown on the publication page of this website.
In 2009 I joined the Naval Systems Team of Rolls-Royce in Bristol, UK, where I was involved in conceptual design and sales support of naval and governmental power and propulsion systems. This experience greatly widened my view on the maritime industry from the commercial point of view and gave me an experience in international cooperation in a large multinational firm.
In 2011 I returned to the Netherlands and joined Damen Shipyards at their Headquarters in Gorinchem. As a member of the R&D department, besides performance predictions and development of prediction tools, I was involved in a great number of worldwide ship trials, focussing on noise and vibration, manoeuvring behaviour and system performance. With the experience of those ship trials and the earlier experience with HIL in my rucksack I was the instigator of a first (small) HIL capability at the shipyard, which has developed tremendously and successfully since then.
From 2015-2020 I joined the Marine Engineering Department of Delft University of Technology and focussed on dynamic behaviour of ship (propulsion) systems. In that context I was actively involved in for example:
- connecting simulated propulsion concepts to model scale hydrodynamic test equipment in a towing tank whilst managing various types of scale effects. The developed ideas were a starting point and I look forward to the day that they will be picked up by hydromechanic research centres around the world. See the “media” section of this website for more details.
- full scale parameter identification of ship propulsion systems. This for instance involved injecting mathematical setpoint signals (blockwaves, sinusoidal waves, coloured noise) into a real propulsion control system in order to quickly obtain unknown parameters of the system.
- combining haptic technology developed at the Delft Haptics Lab with maritime applications. See the “media” section of this website for more details.
In the various roles that I have had I have seen that integration of ship systems is becoming increasingly difficult due to their rising complexity and often the lack of communication tools (the right tables, figures, graphs) to ensure that the involved parties can effectively communicate when they try to integrate their systems together. When this integration is done systematically and correctly from an early stage, it can increase quality and performance of the total system and, perhaps more important, can save time and cost of re-work during the expensive phase of commissioning and sea-trials. In this context I have found that pragmatic use of MBSE and SYSML diagramming techniques can help significantly.
With AVR Maritime I offer my knowledge, skills and experience to the maritime market. I am driven by multidisciplinary innovation both theoretical and practical and I enjoy working together with people from different backgrounds and disciplines.
Further details about me can be found on LinkedIn. Feel free to get in touch to find out more. References can be provided upon request.