A unified approach to optimal energy management in hybrid vehicles
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1999
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1375268314 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu13752683142021-08-03T06:18:55Z A unified approach to optimal energy management in hybrid vehicles Brahma, Avra Aerospace Engineering In recent years, the need for alternative transportation has grown stronger due to concerns about environmental pollution and the realization that fuel reserves are not endless. Hybrid-electric vehicles are fast emerging as a viable form of alternative transportation. Hybrid-electric vehicles offer the prospect of better fuel economy and reduced emissions without compromising the performance of contemporary gasoline or diesel-powered vehicles. Hybrid vehicles differ from conventional vehicles in two important respects: the greater number of design degrees of freedom presents a more complex design optimization problem and a greater complexity in the powertrain imposes a greater challenge in control design.Efficient control and coordination of powertrain components is critical to the success of hybrid technology. The primary function of a supervisory control strategy is energy management in the hybrid powertrain. The scheduling of the various power providers and consumers in the powertrain is an energy management function.In the present work, a methodology is proposed for the optimal solution of the energy management problem in a unified context. The energy management strategy is optimized with respect to energy consumption. An abstracted model of hybrid powertrains is used to cast the energy management problem in a power-efficiency based format. Dynamic programming is then used to solve the problem. In the operation of a hybrid vehicle, decisions at different time instants are not independent of each other due to the presence of integral constraints such as charge sustenance. Moreover, the quantity to be optimized is an integral quantity. Therefore, the nature of the problem makes the use of such a method necessary. The abstract model highlights some essential similarities between different hybrid powertrain systems. It is expected that the proposed unified methodology will allow the solution of the optimal energy management problem for different classes and types of hybrid powertrains using the same general problem structure. The methodology is also suitable for the two different operational contexts: on-line and off¬line. Online optimization is important for economic operation. Offline optimization is important from the point of comparing different designs during the design process, which is essential for design optimization. 1999 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1375268314 http://rave.ohiolink.edu/etdc/view?acc_num=osu1375268314 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Aerospace Engineering |
| spellingShingle |
Aerospace Engineering Brahma, Avra A unified approach to optimal energy management in hybrid vehicles |
| author |
Brahma, Avra |
| author_facet |
Brahma, Avra |
| author_sort |
Brahma, Avra |
| title |
A unified approach to optimal energy management in hybrid vehicles |
| title_short |
A unified approach to optimal energy management in hybrid vehicles |
| title_full |
A unified approach to optimal energy management in hybrid vehicles |
| title_fullStr |
A unified approach to optimal energy management in hybrid vehicles |
| title_full_unstemmed |
A unified approach to optimal energy management in hybrid vehicles |
| title_sort |
unified approach to optimal energy management in hybrid vehicles |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
1999 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1375268314 |
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AT brahmaavra aunifiedapproachtooptimalenergymanagementinhybridvehicles AT brahmaavra unifiedapproachtooptimalenergymanagementinhybridvehicles |
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