Open-loop Independent Metering Control of a Multi-DOF Forwarder Boom

Authors

  • Mikko Huova Automation Technology and Mechanical Engineering, Tampere University, Korkeakoulunkatu 6, FI-33720, Tampere, Finland
  • Jyrki Tammisto Automation Technology and Mechanical Engineering, Tampere University, Korkeakoulunkatu 6, FI-33720, Tampere, Finland
  • Matti Linjama Automation Technology and Mechanical Engineering, Tampere University, Korkeakoulunkatu 6, FI-33720, Tampere, Finland

DOI:

https://doi.org/10.13052/ijfp1439-9776.2121

Keywords:

independent metering, forwarder, energy saving

Abstract

This study applies independent metering control in a forestry forwarder in order to improve its energy efficiency. The paper describes the control method, which enables smooth control mode switches and relatively accurate velocity tracking without position, velocity or acceleration feedback. The energy saving capability is analysed through measured, realistic, working cycle, which is repeated for the baseline system and independent metering system. The input energy taken by the control valves is compared. Furthermore, the power losses of the supply pump and diesel engine are modelled to achieve semi-empirical estimate for the diesel fuel consumption. The results show an average reduction of 25% in the fuel consumption when compared to the baseline.

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Author Biographies

Mikko Huova, Automation Technology and Mechanical Engineering, Tampere University, Korkeakoulunkatu 6, FI-33720, Tampere, Finland

Mikko Huova received a D.Sc. degree at Tampere University of Technology, Finland, in 2015. The topic of his thesis is related to energy efficient digital hydraulic systems. He is continuing research on energy efficiency of mobile machines as a postdoctoral researcher at Tampere University. The areas of interest include control design, modelling and simulation.

Jyrki Tammisto, Automation Technology and Mechanical Engineering, Tampere University, Korkeakoulunkatu 6, FI-33720, Tampere, Finland

Jyrki Tammisto received a M.Sc. degree at Tampere University of Technology, Finland in 1998. Currently he is working as project researcher at the Automation Technology and Mechanical Engineering Unit, Tampere University.

Matti Linjama, Automation Technology and Mechanical Engineering, Tampere University, Korkeakoulunkatu 6, FI-33720, Tampere, Finland

Matti Linjama obtained a D Tech degree at Tampere University of Technology, Finland in 1998. Currently, he is an adjunct professor at the Automation Technology and Mechanical Engineering Unit, Tampere University. He started the study of digital hydraulics in 2000 and has focused on the topic since then. Currently, he is leader of the digital hydraulics research group and his professional interests include the study of hydraulic systems with high performance and energy efficiency.

References

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Published

2020-11-04

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Original Article

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