PMM Replacement Project

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TypeTechnical Report
Series titleLaboratory Memorandum
SubjectPlanar motion mechanism (PMM); static; sway; yaw; tests
AbstractPlanar motion mechanism (PMM) test techniques are used to determine hydrodynamic coefficients for mathematical models of ship manoeuvring [1]. An IOT PMM [2] was commissioned in 1996 and has been used successfully in a number of tank tests since then. The 1996 version of reference [2] was released when the PMM was commissioned. Since then, the apparatus has undergone many changes. The 2005 version describes the current PMM control system. The first part is a user manual and the second, a programmer?s guide. The PMM control has six built-in standard tests: static tests (model yawed), sway only, sway and yaw coupled (pure yaw), coupled motion with static yaw, surge, and turning circles (constant yaw rate). In September 2004, a small group began to investigate PMM use and capability at IOT, with the main objective of enhancing the institute?s capability in this area. Group members are Paul Thorburn (Chair), Christopher Williams, David Molyneux, Michael Sullivan, Michael Lau, Tony Randell and Don Spencer (Oceanic). Initial objectives were: 1.1 determine requirements for a PMM 1.2 produce a concept design to meet the requirements 1.3 provide a cost estimate for recommendations. Recommendations may include improvements the present PMM and/or a proposal for a new PMM A previous investigation in 2002 ended when there was no budget available to pursue improvements to the IOT device. A series of meetings began on September 28, 2004 and is continuing. Discussions, actions and results to date are outlined in this report. All information related to this project is available on an IOT computer network folder (pccommon\PMM).
Publication date
PublisherNational Research Council Canada. Institute for Ocean Technology
PlaceSt. John's, NL
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number6267
NPARC number8895522
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Record identifierca5fb981-7523-4fbb-9d29-c90838db48a5
Record created2009-04-22
Record modified2016-10-03
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