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Model-based verification of a pendulum-arm suspended forwarder for sustainable forestry
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
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2014 (English)In: 18th International Conference of the ISTVS, 2014Conference paper (Refereed)
Abstract [en]

Cut-to-length logging (CTL) is a mechanized harvesting process where trees are delimbed and cut to length directly at the stump. CTL is typically a two-machine operation with a harvester felling, delimbing, and bucking trees, and a forwarder transporting the cut logs from the felling area to a landing area that is accessible by trucks, or trains. A major challenge for the manufacturers of forestry machines for CTL logging is to (1) further increase the harvesting and log transportation productivity, e.g. by enabling operation with higher transportation speed and on eco-soils, (2) reduce the damage to the soil, e.g. by controlling the rut depth and preserving the root layer, and (3) reduce the daily vibration dosage for the machine operators, e.g. by active chassis and cabin suspensions. This paper presents a study of a novel all-wheel-drive pendulum-arm suspended medium-sized forestry machine, with several upgrade performance steps, e.g. passive and active chassis suspensions. The dynamic performance of the new concept are quantified with simulations and compared with a present bogie solution. The simulations show an 80% reduction of whole body vibrations with an active suspension system compared to present passive bogie solutions when operating on a standardized test ground.

Place, publisher, year, edition, pages
Keyword [en]
Chassis suspensions, Forestry machines, Tire-ground contact, Vibration dose value, Whole body vibrations, Active suspension systems, Automobile bodies, Automobile manufacture, Bogies (railroad rolling stock), Chassis, Forestry, Logging (forestry), Pendulums, Timber, Vibrations (mechanical), Dynamic performance, Ground contacts, Mechanized harvesting, Model based verification, Sustainable forestry, Whole body vibration, Suspensions (components), Machinery, Vibration
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-168874ScopusID: 2-s2.0-84926204696OAI: diva2:819502
18th International Conference of the International Society for Terrain-Vehicle Systems, ISTVS 2014, 22 September 2014 through 25 September 2014

QC 20150610

Available from: 2015-06-10 Created: 2015-06-09 Last updated: 2015-06-10Bibliographically approved

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Sellgren, UlfIsmoilov, AbbosBaez, FedericoAndersson, Kjell
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