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Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling
Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2006.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613680380674048 |
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| access_status_str | Open Access |
| author2 | Snyman, Johannes Arnoldus |
| author_browse | Snyman, Johannes Arnoldus |
| author_facet | Snyman, Johannes Arnoldus |
| collection | Thesis |
| dc_rights_str_mv | © 2003, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/29489 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:59.869Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/29489 Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling Snyman, Johannes Arnoldus Uys, Petro E. Els, P.S. (Pieter Schalk) michael.thoresson@up.ac.za Thoresson, Michael John Mathematical optimisation Vehicle suspension Spring and damper characteristics Sqp Dynamic-q Ride comfort Handling UCTD Dissertation (MEng (Mechanical Engineering))--University of Pretoria, 2006. This study aims to evaluate the use of mathematical optimisation algorithms for the optimisation of a vehicle’s spring and damper characteristics, with respect to ride comfort and handling. Traditionally the design of a vehicle’s suspension spring and damper characteristics are determined by a few simple planar model calculations, followed by extensive trial-and-error simulation or track testing. With the current advanced multi-body dynamics computer software packages available to the design engineer, the integration of traditional mathematical optimisation techniques with these packages, can lead to much faster product development. This, in turn results in a reduction of development costs. A sports utility vehicle is modelled by means of a general-purpose computer programme for the dynamic analysis of a multi-body mechanical system. This model is validated against measurements from road tests. The mathematical model is coupled to two gradient-based mathematical optimisation algorithms. The performance of the recently proposed Dynamic-Q optimisation algorithm, is compared with that of the industry-standard gradient based Sequential Quadratic Programming method. The use of different finite difference approximations for the gradient vector evaluation is also investigated. The results of this study indicate that gradient-based mathematical optimisation methods may indeed be successfully integrated with a multi-body dynamics analysis computer program for the optimisation of a vehicle’s suspension system. The results in a significant improvement in the ride comfort as well as handling of the vehicle. Mechanical and Aeronautical Engineering unrestricted 2013-09-07T15:45:43Z 2005-11-16 2013-09-07T15:45:43Z 2003-09-07 2006-11-16 2005-11-16 Dissertation Thoresson, M 2003, Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/29489 > http://hdl.handle.net/2263/29489 http://upetd.up.ac.za/thesis/available/etd-11162005-155118/ © 2003, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Mathematical optimisation Vehicle suspension Spring and damper characteristics Sqp Dynamic-q Ride comfort Handling UCTD Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling |
| title | Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling |
| title_full | Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling |
| title_fullStr | Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling |
| title_full_unstemmed | Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling |
| title_short | Mathematical optimisation of the suspension system of an off-road vehicle for ride comfort and handling |
| title_sort | mathematical optimisation of the suspension system of an off road vehicle for ride comfort and handling |
| topic | Mathematical optimisation Vehicle suspension Spring and damper characteristics Sqp Dynamic-q Ride comfort Handling UCTD |
| url | http://hdl.handle.net/2263/29489 http://upetd.up.ac.za/thesis/available/etd-11162005-155118/ |