A new horizontal planar motion mechanism (PMM) for the NRC-IOT towing tank and ice tank

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Conference2nd International conference on advanced model measurement technology for EU maritime industry, 4-6 April, 2011, Newcastle upon Tyne, UK
Subjectforce dynamometer; hydrodynamic derivatives; ice-induced manoeuvring forces; ice manoeuvring; planar motion mechanism; (PMM); towing tank; ice tank
AbstractA Planar Motion Mechanism (PMM) is an electromechanical device used to conduct manoeuvring studies and experiments on scale models of ships. A PMM moves a vessel model in exact pre-programmed patterns while resulting forces and moments are measured using a force dynamometer attached to the model. From these studies, manoeuvring derivatives can be calculated and then used to estimate or simulate motions of the full-scale vessel. In 1995, the National Research Council’s Institute for Ocean Technology (NRC-IOT) developed a PMM for its Towing Tank to measure hydrodynamic derivatives and then tried to extend the device to measuring ice-induced manoeuvring forces as part of a new research effort for icebreaking vessels. Using this device in the Ice Tank highlighted strength limitations associated with the mechanism. In 2007 Cussons Technology Ltd (CTL), of Manchester was contracted by NRC-IOT to design and fabricate a new PMM, capable of both hydrodynamic manoeuvring studies and ice manoeuvring studies. This paper describes the development and implementation processes of the PMM from initial specification to design, manufacture, test/commissioning, and finally model testing at NRC-IOT. The paper illustrates the improved performance of the new PMM, which paves the way for an expanded NRC-IOT research program related to in-ice manoeuvring.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
NPARC number19577533
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Record identifier77391fbb-2a89-426b-8469-eb06071a0054
Record created2012-03-29
Record modified2016-05-09
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