Design of control for efficiency of AUV power systems
Name
815527315-MIT.pdf
Description
Full printable version
Size
6.95 MB
Format
Adobe PDF
Checksum (MD5)
e9c29b6f22cb3d0a6a6185a18c9642fa
Author(s)
Ware, Laura M. (Laura Marie)
Advisor(s)
Douglas P. Hart.
Alternative Title
Design of control for efficiency of Autonomous Underwater Vehicle power systems
Date Issued
2012
Publisher
Massachusetts Institute of Technology
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.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 71).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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reproduction or distribution in any format is prohibited without written
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