Search results for "cranes"

showing 3 items of 3 documents

A model for torque losses in variable displacement axial piston motors

2018

This paper includes a comparison of earlier presented models for torque losses in hydraulic motors and several proposed models that all rely on data typically available for a system engineer. The new models and the old ones are compared. The new models are all based on a model developed by Jeong 2007 with an expansion that include variable displacement. All of the new models yield very good accuracy down to approximately 50% of maximum displacement and down to approximately 15% of maximum speed. In these operational ranges the deviation in torque is less than 1%. The main purpose of the new models is to facilitate simulations of hydraulically actuated winches with a balance between accuracy…

0209 industrial biotechnologytorque loss020208 electrical & electronic engineeringHydraulics02 engineering and technologyMechanicsVariable displacementlcsh:QA75.5-76.95Computer Science Applicationslaw.inventionPiston020901 industrial engineering & automationBosch RexrothControl and Systems EngineeringlawModeling and Simulationaxial piston motor0202 electrical engineering electronic engineering information engineeringTorquewinch drivelcsh:Electronic computers. Computer scienceoffshore knuckle boom cranesSoftwareGeologyModeling, Identification and Control
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Evaluation of user experience goal fulfillment

2014

In this paper, the results of a user experience (UX) goal evaluation study are reported. The study was carried out as a part of a research and development project of a novel remote operator station (ROS) for container gantry crane operation in port yards. The objectives of the study were both to compare the UXs of two different user interface concepts and to give feedback on how well the UX goals experience of safe operation, sense of control, and feeling of presence are fulfilled with the developed ROS prototype. According to the results, the experience of safe operation and feeling of presence were not supported with the current version of the system. However, there was much better suppor…

business.industryComputer sciencemedia_common.quotation_subjectevalutioncranesUsabilityPort (computer networking)remote operator stationsRemote operationFeelingUser experience designHuman–computer interactionuser experienceContainer (abstract data type)User interfacebusinessGantry cranemedia_common
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Practice for determining friction in hydraulic winch systems

2020

This paper presents a method for estimating friction in hydraulic active heave compensated (AHC) offshore winches. The method is a two-step approach where the first step is to model the friction loss in the hydraulic motors based on data from the sub-supplier. The second step requires real-life testing, where the remaining friction losses in the winch system is identified and modeled. In this context, a practice is characterized by obtaining a friction loss estimation with the highest possible accuracy over the widest possible range of operating conditions with a limited amount of experimental work. The method benefits from the use of parametric models, sub-supplier data, and real-life meas…

winch systemEngineeringbusiness.industrytorque losshydraulicslcsh:QA75.5-76.95Computer Science ApplicationsControl and Systems EngineeringModeling and Simulationlcsh:Electronic computers. Computer scienceoffshore knuckle boom cranesWinchbusinessSoftwareMarine engineeringModeling, Identification and Control: A Norwegian Research Bulletin
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