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Discrete Event Simulations in Forest Technology
Umeå University, Faculty of Science and Technology, Department of Physics. (UMIT Research Lab)
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Development of a tool for discrete event simulations in forest technology, dependent onspatial components, has successfully been initialized in this thesis project. These simulations may be used to optimize the way the forest is used and to evaluate new machine concepts in forestry. The Python library for discrete event simulation, SimPy, was chosen as the foundationfor the tool. The developed tool can handle spatial objects such as moving machines, trees and boulders. Support for continuous linear movements was also added, which has resulted in a model that partially overlaps continuous and discrete event simulations without any additional computational costs. The result is simulations of a forest with machines operating in it. Two pilot simulations,one of a thinning machine and one of a planting machine, were performed with useful results. The new simulation tool shows promising properties. Limitations and improvements arediscussed, with the conclusion that continued development is recommended.

Abstract [sv]

I det här examensarbetet har ett verktyg för diskret event simuleringar inom skogsteknikutvecklats. Sådana simuleringar kan användas för att optimera arbete inom skogsbruk samtför att utvärdera nya maskintekniska koncept. Programmeringsspråket Pythons bibliotek för diskret event simulering, SimPy, valdessom grund för verktyget. Det utvecklade verktyget kan hantera spatiala objekt såsom träd,stenar och stubbar. Stöd för kontinuerliga rörelser har även utvecklats, vilket resulterat i enmodell som delvis överlappar kontinuerliga simuleringar och diskret event simuleringar.Resultatet är kvalitativa simuleringar av skog och skogsmaskiner. Två lyckade simule-ringsstudier har gjorts för Sveriges Lantbruksuniversitet, en simulering av en gallringsmaskinoch en simulering av en planteringsmaskin. Det nya simuleringsverktyget uppvisar lovande egenskaper, även om det har sina be-gränsningar. Fortsatt utveckling av verktyget rekommenderas starkt.

Place, publisher, year, edition, pages
2011. , 65 p.
Keyword [en]
Discrete Event Simulation, Forest, Spatial entities, SimPy, Python, Planting Machine, Thinning
Keyword [sv]
Diskret Event Simulering, Skogsteknik, Spatiala objekt, SimPy, Python, Planterings- maskin, Gallring
URN: urn:nbn:se:umu:diva-45678OAI: diva2:433602
Subject / course
Examensarbete i teknisk fysik
Educational program
Civilingenjörsprogrammet i teknisk fysik
Available from: 2011-08-10 Created: 2011-08-10 Last updated: 2011-08-10Bibliographically approved

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Jundén, Linus
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