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Simulated productivity of one- and two-armed tree planting machines

Ersson, Back Tomas and Jundén, Linus and Bergsten, Urban and Servin, Martin (2013). Simulated productivity of one- and two-armed tree planting machines. Silva Fennica. 47:2, 23
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Official URL: http://www.silvafennica.fi/article/958

Abstract

To increase mechanized planting, planting machine productivity must increase in order to improve cost-efficiency. To determine if excavators with two crane arms could potentially help to increase planting machine productivity under Nordic clearcut conditions, we modelled one-armed and semi-automated two-armed excavators with one- and two-headed planting devices. Using a recently developed tool for discrete-event simulation, these machine models then mounded and planted seedlings on terrain models with moraine soil having various frequencies of obstacles (stumps, roots and stones). Compared to if the two heads were mounted pairwise on only one arm, the results showed that productivity did not increase if two planting heads were attached individually to two separate crane arms. But productivity did increase if the planting machine had four planting heads mounted pairwise on two separate arms. However, despite assuming automated mounding and crane motion between planting spots, the two-armed, four-headed model never achieved high enough productivity levels to make it more cost-efficient than one-armed machines. The simulations illustrate that our terrain models generate realistic root architecture and boulder content distributions in moraine soil, while our machine models functionally describe mechanized planting work. Based on our assumptions, we conclude that further development work on two-armed excavator-based planting machines for Nordic clearcut conditions is not warranted. Our simulations reveal that increasing the number of planting heads per crane arm rather than number of crane arms per base machine offers the greatest potential to raise the productivity of intermittently advancing planting machines.

Authors/Creators:Ersson, Back Tomas and Jundén, Linus and Bergsten, Urban and Servin, Martin
Title:Simulated productivity of one- and two-armed tree planting machines
Series/Journal:Silva Fennica (0037-5330)
Year of publishing :2013
Volume:47
Number:2
Page range:23
Publisher:The Finnish Society of Forest Science, The Finnish Forest Research Institute
ISSN:0037-5330
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K01 Forestry - General aspects
K Forestry > K11 Forest engineering
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 102 Computer and Information Science > 10201 Computer Science
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 202 Electrical Engineering, Electronic Engineering, Information Engineering > Robotics
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:mechanized planting, automation, terrain model, root model, discrete-event simulation, silviculture, forestry
URN:NBN:urn:nbn:se:slu:epsilon-e-1809
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1809
ID Code:11056
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology (from 131204)
Deposited By: Back Tomas Ersson
Deposited On:18 Mar 2014 10:04
Metadata Last Modified:08 Sep 2017 11:36

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