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Use of individual wheel steering to improve vehicle stability and disturbance rejection
Dissertation (MSc)--University of Pretoria, 2010.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613629552001024 |
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| access_status_str | Open Access |
| author2 | Theron, Nicolaas J. |
| author_browse | Theron, Nicolaas J. |
| author_facet | Theron, Nicolaas J. |
| collection | Thesis |
| dc_rights_str_mv | © 2009, 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 (MSc)--University of Pretoria, 2010. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28064 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:11.459Z |
| 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:2263/28064 Use of individual wheel steering to improve vehicle stability and disturbance rejection Theron, Nicolaas J. rnkhoma@gmail.com Kasanalowe Nkhoma, Richard Chimkonda Robust control Iws Disturbance rejection Yaw rate Four wheel steering Lateral acceleration 4ws Individual wheel steering Robust decoupling UCTD Dissertation (MSc)--University of Pretoria, 2010. The main aim of this research project is to extend theories of four-wheel-steering as developed by J. Ackermann to include an individually steered four-wheel steering system for passenger vehicles. Ackermann’s theories, including theories available in this subject area, dwell much on vehicle system dynamics developed from what is called single track model and some call it a bicycle model. In the bicycle model, the front two wheels are bundled together. Similarly, the rear wheels are bundled together. The problem with this is that it assumes two front wheels or two rear wheels to be under the same road, vehicle and operating conditions. The reality on the ground and experiments that are conducted are to the contrary. Therefore this study discusses vehicle disturbance rejection through robust decoupling of yaw and lateral motions of the passenger vehicle. A mathematical model was developed and simulated using Matlab R2008b. The model was developed in such a way that conditions can be easily changed and simulated. The model responded well to variations in road and vehicle conditions. Focus was in the ability of the vehicle to reject external disturbances. To generate yaw moment during braking, the brake on the left front wheel was disconnected. This was done because lateral wind generators, as used by Ackermann, were not available. The results from both simulations and experiments show disturbance rejection in the steady state. Copyright Mechanical and Aeronautical Engineering unrestricted 2013-09-07T12:49:02Z 2010-09-20 2013-09-07T12:49:02Z 2010-09-02 2010-09-20 2010-09-20 Dissertation Kasanalowe Nkhoma, RC 2009, Use of individual wheel steering to improve vehicle stability and disturbance rejection, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28064 > E10/604/gm http://hdl.handle.net/2263/28064 http://upetd.up.ac.za/thesis/available/etd-09202010-202652/ © 2009, 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 | Robust control Iws Disturbance rejection Yaw rate Four wheel steering Lateral acceleration 4ws Individual wheel steering Robust decoupling UCTD Use of individual wheel steering to improve vehicle stability and disturbance rejection |
| title | Use of individual wheel steering to improve vehicle stability and disturbance rejection |
| title_full | Use of individual wheel steering to improve vehicle stability and disturbance rejection |
| title_fullStr | Use of individual wheel steering to improve vehicle stability and disturbance rejection |
| title_full_unstemmed | Use of individual wheel steering to improve vehicle stability and disturbance rejection |
| title_short | Use of individual wheel steering to improve vehicle stability and disturbance rejection |
| title_sort | use of individual wheel steering to improve vehicle stability and disturbance rejection |
| topic | Robust control Iws Disturbance rejection Yaw rate Four wheel steering Lateral acceleration 4ws Individual wheel steering Robust decoupling UCTD |
| url | http://hdl.handle.net/2263/28064 http://upetd.up.ac.za/thesis/available/etd-09202010-202652/ |