“Practice for determining friction in hydraulic winch systems”

Authors: Geir-Arne Moslått and Michael R. Hansen,
Affiliation: University of Agder
Reference: 2020, Vol 41, No 2, pp. 109-120.

Keywords: Hydraulics, torque loss, winch system, offshore knuckle boom cranes

Abstract: 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 measurements on a 150 t AHC crane from National Oilwell Varco Norway (NOVN). The work is an important part of developing a simulation model that can be used actively in virtual testing and verification of crane operations at NOVN. A friction loss model developed from the proposed method was implemented in a NOVN simulation model. Computed and measured hydraulic pressures showed deviations of less than 10% from measured results for a 150 t crane operating in AHC.

PDF PDF (3885 Kb)        DOI: 10.4173/mic.2020.2.6

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  title={{Practice for determining friction in hydraulic winch systems}},
  author={Moslått, Geir-Arne and Hansen, Michael R.},
  journal={Modeling, Identification and Control},
  publisher={Norwegian Society of Automatic Control}