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Suspension System Dimensioning and Modelling for Co-Simulation with Simulink and Adams
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Vehicle Dynamics.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This master thesis addresses the dimensioning of a hydraulic suspension system for a hybrid forest truck (HFT) under development. Furthermore, the suspension system has been modelled in MATLAB/Simulink and an environment has been set-up for a cosimulation with the vehicle model in MSC Adams. The interface between the programs has been determined and the required preprocess is described, step by step. Numerical problems and challenges that have arisen have been discussed, together with recommendations for how they could be solved.

The purpose of the co-simulations have been to analyse the vehicle vibration levels and tune component parameters, such that, the international standard for whole-body vibrations, ISO 2631-1 (1997) and AFS 2005:15 (2005) can be met. The results are presented and clearly shows that the vibration levels in the vehicle cab are acceptable according to the standards. Moreover, recommendations are given for future work regarding how cosimulation problems could be solved, but also how to develop this passive suspension system to be of active type.

Abstract [sv]

Detta examensarbete behandlar dimensioneringen av ett hydrauliskt fjadringssystem for en hybrid skotare (HFT) under utveckling. Fjadringssystemet har dessutom modellerats i MATLAB/Simulink och en miljo har upprattats for co-simulering med fordonsmodellen i MSC Adams. Granssnittet mellan programmen har bestamts och den erforderliga forprocessen har beskrivits, steg for steg. Numeriska problem och utmaningar som uppkommit har diskuterats, tillsammans med rekommendationer for hur de kan losas.

Syftet med co-simuleringarna har varit att analysera fordonets vibrationsnivaer och justera komponentparametrar, sa att, den internationella standarden for helkroppsvibrationer ISO 2631-1 (1997) och AFS 2005:15 (2005) kan bemotas. Resultaten presenteras och visar tydligt att vibrationsnivaerna i fordonshytt ar av acceptabel niva enligt standard. Rekommendationer har aven getts for vidare arbete, bade vad galler hur co-simuleringsproblem kan losas, men aven hur man skulle kunna utveckla detta passiva fjadringssystem till att vara av aktiv typ.

Place, publisher, year, edition, pages
2014. , 59 p.
TRITA-AVE, ISSN 1651-7660 ; 2014:63
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-172214OAI: diva2:846154
Available from: 2015-08-14 Created: 2015-08-14 Last updated: 2015-08-14Bibliographically approved

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