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Development and realization of an operator seat with active suspension
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Utveckling och realisering av en operatörstol med aktiv dämpning (Swedish)
Abstract [en]

In this thesis work, generated design concepts during previous thesis work performed by Doroftei Teodor and Osorio Omar. in 2013 for an operator seat for forestry machines, have been examined. This examination was made in order to design a full-scale prototype of an operator seat featuring active suspension. With the help of this analysis, a proposal for a prototype, which decreases the effects on the operator caused by vibrations in the cabin, was developed. By damping the vibrations in the operator seat, the operator is not exposed to in-time harmful injuries and can therefore work for a longer time. With an actively suspended operator seat, new ways open up for a more effective forestry industry as the work becomes more convenient for the operator.

This report presents how the work was performed. The first chapters of the report concern the background for the work, the components and subassemblies of the previous generated design concepts as well as standard components needed in order to realize an active operator seat suspension. Then, the most applicable concept is further developed to a full-scale prototype using CAD-modelling and evaluated using FEM-analysis. Based on the CAD-models, a prototype was manufactured, the vibration control is discussed and conclusions and proposals for future work are presented.

Keywords: Operator, seat, active, suspension, pneumatic

Abstract [sv]

I det här examensarbetet har designkoncept för en aktivt dämpad operatörstol för skogmaskiner, framtagna av Doroftei T & Osario O under tidigare examensarbete som ägt rum år 2013, analyserats för att därefter resultera i en prototyp. Med hjälp av dessa analyser har ett förslag utformats i form av en prototyp som minskar påfrestningarna hos maskinoperatören orsakade av vibrationer i hytten. Genom att dämpa vibrationerna i operatörstolen, utsätts inte operatören för skadliga påfrestningar och kan därmed arbeta längre. Med en aktivt dämpad operatörstol öppnas nya möjligheter för en effektivare skogindustri då arbetet blir bekvämare och mindre påfrestande för operatören.

I den här rapporten redogörs hur arbetet gått tillväga. Rapporten inleds med bakgrunden till examensarbetet, uppbyggnaden av de tidigare framtagna designkoncepten samt nödvändiga standardkomponenter för att aktivt kunna dämpa operatörstolsvibrationerna. Därefter presenteras det mest tillämpbara konceptet som i sin tur utvecklas till en fullskalig prototyp med hjälp CAD-modellering och utvärderas med hjälp av FEM-analyser. Baserat på de CAD-modeller som tagits fram, tillverkas en fullskalig prototyp, därefter diskuteras den aktiva regleringen. Rapporten avslutas sedan med slutsatser och förslag på framtida arbete.

Sökord: Operatör, stol, aktiv dämpning, pneumatik

Place, publisher, year, edition, pages
2014. , 82 p.
Series
MMK 2014:x MKN 111
Keyword [en]
Operator, seat, active, suspension, pneumatic
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-157241OAI: oai:DiVA.org:kth-157241DiVA: diva2:769505
Supervisors
Examiners
Available from: 2014-12-08 Created: 2014-12-08

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Development and realization of an operator seat with active suspension(3501 kB)180 downloads
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Type fulltextMimetype application/pdf

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