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dc.contributor.authorPei, Dekunen_US
dc.date.accessioned2013-01-17T21:59:30Z
dc.date.available2013-01-17T21:59:30Z
dc.date.issued2012-11-14en_US
dc.identifier.urihttp://hdl.handle.net/1853/45904
dc.description.abstractThis thesis (1) reports the development of simulation tools and control strategies for optimizing hybrid electric vehicle (HEV) energy management, and (2) reports the design and testing of a hydraulic hybrid school bus (HHB) prototype. A hybrid vehicle is one that combines two or more energy sources for use in vehicle propulsion. Hybrid electric vehicles have become popular in the consumer market due to their greatly improved fuel economy over conventional vehicles. The control strategy of an HEV has a paramount effect on its fuel economy performance. In this thesis, backward-looking and forward-looking simulations of three HEV architectures (parallel, power-split and 2-mode power-split) are developed. The Equivalent Cost Minimization Strategy (ECMS), which weights electrical power as an equivalent fuel usage, is then studied in great detail and improvements are suggested. Specifically, the robustness of an ECMS controller is improved by linking the equivalence factor to dynamic programming and then further tailoring its functional form. High-fidelity vehicle simulations over multiple drive-cycles are performed to measure the improved performance of the new ECMS controller, and to show its potential for online application. While HEVs are prominent in the consumer market and studied extensively in current literature, hydraulic hybrid vehicles (HHVs) only exist as heavy utility vehicle prototypes. The second half of this thesis reports design, construction, and testing of a hydraulic hybrid school bus prototype. Design considerations, simulation results, and preliminary testing results are reported, which indicate the strong potential for hydraulic hybrids to improve fuel economy in the school bus vehicle segment.en_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectHydraulic hybrid vehicleen_US
dc.subjectHybriden_US
dc.subjectPriusen_US
dc.subjectDynamic programmingen_US
dc.subjectHybrid electric vehicleen_US
dc.subjectOptimal controlen_US
dc.subjectECMSen_US
dc.subjectDPen_US
dc.subjectEquivalent cost minimization strategyen_US
dc.subject.lcshEnergy consumption
dc.subject.lcshHybrid electric cars
dc.subject.lcshElectric automobiles
dc.subject.lcshElectric automobiles Research
dc.titleDevelopment of simulation tools, control strategies, and a hybrid vehicle prototypeen_US
dc.typeThesisen_US
dc.description.degreeMSen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.advisorCommittee Chair: Leamy, Michael J.; Committee Member: Ferri, Aldo A.; Committee Member: Sadegh, Naderen_US


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