College of Engineering

NUWC-UMD Seminar: Jason Gaudette from Brown University

Date(s): 11/2/2012 2:00 PM - 11/2/20123:00 PM
Location: Charlton College of Business, CCB-115
Contact: Lara Stone 508-999-8372

Bio-Inspired Broadband Sonar for Clutter Reduction: Computational Modeling and System Evaluation

This research focuses on developing a computational model and hardware prototype of a biologically inspired broadband sonar system. Many species of bats, dolphins, and whales have adapted to their environment by using echolocation for hunting prey, avoiding obstacles, and surviving with minimal vision. The biological solution to imaging with sound looks vastly different from man-made sonar by exploiting bandwidth in an unconventional way. Our model aims to mimic the neural information processing of echolocating bats used to suppress clutter in complex acoustic environments. At the model's core is an improved version of the Spectrogram Correlation and Transformation (SCAT) receiver that integrates numerous findings based on recent Neuroscience research in our lab at Brown University. The original monaural SCAT model for range-only detection and localization is expanded to a binaural, two-dimensional model for high-resolution sonar imaging in the range-azimuth plane. Through acoustic simulation and sonar image reconstruction, this research will demonstrate the advanced capabilities of the sonar system and its ability to outperform conventional methods amidst dense clutter. As proof-of-concept, an embedded prototype of this new technology is being designed and built for the future goal of closed-loop integration with an autonomous vehicle's guidance and motor control system.

Jason Gaudette is currently a Ph.D. candidate in Biomedical Engineering at Brown University and is advised by Dr. James Simmons. He received the M.S. Electrical Engineering degree from the University of Rhode Island in 2005 and the B.S. Electrical Engineering degree from Worcester Polytechnic Institute in 2003. Jason also works as an electrical engineer in the Advanced Acoustic Systems Division at the Naval Undersea Warfare Center, Newport, RI. Highlights of his work include electronics design and development for a variety of research programs such as acoustic countermeasure devices, forward-looking sonar systems, and NUWC's bio-robotic autonomous underwater vehicle (BAUV).

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