A control algorithm for active/passive hydraulic winches used in active heave compensation

Geir Arne Moslått*, Damiano Padovani, Michael R. Hansen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The most common active heave compensated offshore cranes have hydraulic winch systems. This paper investigates an active/passive hydraulic winch system with variable-displacement motors and variable-displacement pumps. The paper addresses the challenges when the active motors are set with a low displacement. The active motor displacement is shown to have significant impact on the dynamics of the closed loop hydraulic system. The classical control strategy for this type of system do not address these challenges and will in certain situations have significantly reduced performance. Therefor, a new control method is presented that utilize the variable displacement of the pumps and motors for speed control and to improve dynamics characteristics. The new winch controller is tested in a high-fidelity simulation model and is shown to improve low speed performance, reduce winch speed limitations by up to 30%, reduce system peak pressure by approximately 20%, and reduce control error by approximately 30%.

Original languageEnglish
Title of host publicationASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791859339
DOIs
StatePublished - 2020
Externally publishedYes
EventASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019 - Longboat Key, United States
Duration: 7 Oct 20199 Oct 2019

Publication series

NameASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019

Conference

ConferenceASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019
Country/TerritoryUnited States
CityLongboat Key
Period7/10/199/10/19

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