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Design of control for efficiency of AUV power systems

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dc.contributor.advisor Douglas P. Hart. en_US Ware, Laura M. (Laura Marie) en_US
dc.contributor.other Massachusetts Institute of Technology. Dept. of Mechanical Engineering. en_US 2012-11-19T19:18:05Z 2012-11-19T19:18:05Z 2012 en_US 2012 en_US
dc.description Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012. en_US
dc.description Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references (p. 71). en_US
dc.description.abstract The MIT Rapid Development Group designed and built an internal combustion hybrid recharging system for the REMUS 600 Autonomous Underwater Vehicle (AUV) in collaboration with the MIT Lincoln Laboratory. This power system will recharge the lithium ion battery pack of the REMUS 600 and allow the vehicle to travel for 40 consecutive 12-hour missions without returning to recharge. This study analyzes the optimization of time and fuel efficiency in systems of this type. First, the battery charging scheme for optimal time efficiency was investigated through theoretical simulation of the REMUS battery recharging, based on typical curves for lithium ion battery charging. Secondly, the optimal control system for optimizing fuel efficiency was found by examining behavior in several different engines and predicting behavior in MIT RDG hybrid system's engine. A system was developed to control the throttle of the engine while sensing the voltage coming out of a synchronous rectification bridge. This scheme keeps the throttle above 50% unless the power requirement of the charger drops suddenly. Finally, the control scheme was implemented in software, along with controls for engine starting and shutdown. en_US
dc.description.statementofresponsibility by Laura M. Ware. en_US
dc.format.extent 71 p. en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. en_US
dc.rights.uri en_US
dc.subject Mechanical Engineering. en_US
dc.title Design of control for efficiency of AUV power systems en_US
dc.title.alternative Design of control for efficiency of Autonomous Underwater Vehicle power systems en_US
dc.type Thesis en_US S.B. en_US
dc.contributor.department Massachusetts Institute of Technology. Dept. of Mechanical Engineering. en_US
dc.identifier.oclc 815527315 en_US

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