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Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems
Dissertation (MEng)--University of Pretoria, 2007.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613713980194817 |
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| access_status_str | Open Access |
| author2 | Xia, Xiaohua |
| author_browse | Xia, Xiaohua |
| author_facet | Xia, Xiaohua |
| collection | Thesis |
| dc_rights_str_mv | © 2005, 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)--University of Pretoria, 2007. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/24857 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:40:31.851Z |
| 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:2263/24857 Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems Xia, Xiaohua Mingshan@up.ac.za Chou, Ming-Shan Train control Ecp Closed-loop control Lqr Reconfigurable UCTD Dissertation (MEng)--University of Pretoria, 2007. In this study a closed-loop cruise controller to minimise the running costs of the heavy-haul train is proposed. The running costs of a heavy-haul train are dependent on its travelling time, maintenance costs and energy consumption during the trip. The Coallink train with the new train technologies, Distributed Power (DP) traction and Electronically Controlled Pneumatic (ECP) brake system, is the centre of the study. A literature study on existing train control, both passenger and heavy-haul trains, is carried out to build up a knowledge base. Many different techniques for train handling were observed, their features in relation to heavy-haul ECP trains are discussed. From these backgrounds, a comprehensive longitudinal train model is proposed and successfully validated with real-life data from Spoornet. In the model, both static and dynamic in-train forces are studied, as well as energy consumption. This is possible by modelling each locomotive and wagon as an individual unit. The equations of motion for the train with coupled units and additional non-linearities, such as traction power limits, are considered. An open-loop controller for maintaining equilibrium velocity is designed. During transient velocity changes, a transient controller for calculating the required additional acceleration and deceleration is designed and validated. Because locomotive traction settings are only available in discrete notches, quantisation conversion from force into notches results in input chattering. In addition, during brake to traction transitions, the locomotives receive a sudden traction demand which results in spikes in in-train forces. To avoid these problems, input filtering is performed for these inputs. Closed-loop controllers based on LQR method, optimised for in-train forces, energy consumption and velocity regulation respectively, are designed and compared. To overcome the communication constraints, a fencing concept is introduced whereby the controller is reconfigured adaptively to the current track topology. Different train configurations in terms of availability of additional control channels for both traction and braking are compared, as well as their effects on dynamic and static in-train force. These configurations are unified, distributed and individual traction and brake controls. The results from these different configurations are compared to recorded train data and given in this study. From the results, it is found that the closed-loop controller optimised for in-train force is able to provide the best overall improvement out of the three controllers. Electrical, Electronic and Computer Engineering Unrestricted 2013-09-06T18:35:51Z 2006-01-24 2013-09-06T18:35:51Z 2005-08-17 2007-01-24 2006-01-24 Dissertation Chou, M 2005, Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/24857 > http://hdl.handle.net/2263/24857 http://upetd.up.ac.za/thesis/available/etd-01242006-121509/ © 2005, 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 | Train control Ecp Closed-loop control Lqr Reconfigurable UCTD Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems |
| title | Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems |
| title_full | Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems |
| title_fullStr | Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems |
| title_full_unstemmed | Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems |
| title_short | Optimal cruise control of heavy-haul trains equipped with electronic controlled pneumatic brake systems |
| title_sort | optimal cruise control of heavy haul trains equipped with electronic controlled pneumatic brake systems |
| topic | Train control Ecp Closed-loop control Lqr Reconfigurable UCTD |
| url | http://hdl.handle.net/2263/24857 http://upetd.up.ac.za/thesis/available/etd-01242006-121509/ |