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Andy Stewart Assistant Director, Defense and Industry Programs and Associate Director, PMEC Assistant Professor, Mechanical Engineering andy@apl.washington.edu Phone 206-221-8015 |
Biosketch
Andrew Stewart's research supports the development of next-generation ocean science technology and the creation of new tools to advance capabilities and maintain strategic advantage for the U.S. Navy.
His interests include vehicles, marine renewable energy technologies, remote sensing, and robotics. Through employing design methodologies rooted in fundamental principles, Stewart contributes to all phases of project development from conceptual design to fabrication, testing, and deployment.
In addition to conducting federally-funded research, Dr. Stewart is actively commercializing technology developed within the Laboratory and frequently collaborates with industry to aid transition.
In 2014 Dr. Stewart joined the executive committee of the Pacific Marine Energy Center as Associate Director.
Education
B.S. Mechanical Engineering, University of California San Diego, 2006
M.A. Dynamics & Control Theory, Princeton University, 2008
Ph.D. Mechanical & Aerospace Engineering, Princeton University, 2012
Projects
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Request for Information: Marine and Hydrokinetic (MHK) Energy Advancement for Naval Facilities Request for Information: The Laboratory is seeking partners interested in producing wave or current energy converters that are viable for use at naval facilities. Submissions are due April 29th. |
17 Mar 2016
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Regional Scale Nodes HD Video Camera A high-definition video stream, sent real-time and uncompressed to shore from the Axial Volcano caldera, will be at a resolution of 1920 x 1080 pixels, 60 frames per second, interlaced. The goal is to obtain the highest resolution views possible of jetting black smoker fluids and coupled biologial activity on this hydrothermal sulfide chimney. |
1 Jul 2013
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Oceangate Cyclops OceanGate Inc., a global provider of deep-sea manned submersible solutions, has announced a collaboration with the University of Washington%u2019s Applied Physics Lab on Project Cyclops, a revolutionary new 3000-m manned submersible that will usher in a new era of increased access to the deep ocean for commercial exploration and research ventures. |
7 May 2013
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Videos
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Knotty Dawg: Student-Designed, Student-Powered Submarine The 20172018 UW Human-Powered Submarine Team is ready for international competition. They hope to set speed records with their two-person vehicle constructed mostly of wood. |
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25 May 2018
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The UW's entry in the first International Submarine Races competition in 1989 was built at APL-UW and the team was comprised of Laboratory scientists and engineers, and UW students. Since then, the team has been an active club in the UW Department of Mechanical Engineering. |
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Wave Energy Buoy that Self-deployes (WEBS) The Wave Energy Buoy that Self-deploys (WEBS) converts surface wave energy to mechanical and electrical power. WEBS is an easily deployed power station that can operate anywhere in the off-shore environment. Potential applications include power sensor payloads for scientific instrumentation; power station for autonomous systems, undersea vehicles, and/or surface vessels; and communications relay. |
13 Dec 2016
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Human Powered Submarine Team 2016 The UW HPST has been active for over 20 years as a student club in the UW Deparment of Mechanical Engineering. Every year the team designs and builds a submarine to compete in the alternate-year International and European Submarine Races. APL-UW Principal Engineer Andy Stewart serves as the team's faculty advisor for the 20152016 academic year. |
7 Sep 2016
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Publications |
2000-present and while at APL-UW |
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Station-keeping simulation of a non-moored WEC Rusch, C., B. Polagye, J. Joslin, and A. Stewart, "Station-keeping simulation of a non-moored WEC," Proc., 4th Marine Energy Technology Symposium, 25-27 April, Washington, D.C. (2016). |
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25 Apr 2016 ![]() |
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While most concepts for wave energy revolve around anchored or tethered wave energy converters (WECs), untethered WECs may have broader potential applications. The lack of an anchor simplifies deployment and recovery operations and eliminates a component of the WEC that constitutes approximately 10% of the capital expense. |
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Extrinsic calibration of an RGB camera to a 3D imaging sonar Marburg, A., and A. Stewart, "Extrinsic calibration of an RGB camera to a 3D imaging sonar," Proc., OCEANS 2015, 19-22 October, Washington, D.C. (MTS/IEEE, 2015). |
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19 Oct 2015 ![]() |
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The introduction of low-cost RGB-depth (RGB-D) sensors have led to a diversity of algorithms for robust 3D scene reconstruction under controlled settings, but the underwater realization of such algorithms has been hampered by the constrained performance of most RGB-D sensors in water. We explore the possibility of fusing a point cloud generated from a high-frequency, mechanically scanned 3D imaging sonar with visual data from a camera to create a rich 3D representation of objects in the water column. A state-of-the-art algorithm for depth sensor-to-camera registration utilizing concurrent images of spherical targets is adapted, and the resulting alignment is used to combine sonar and visual imagery. |
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Integrated instrumentation for marine energy monitoring Polagye, B., J. Joslin, A. Stewart, and A. Copping, "Integrated instrumentation for marine energy monitoring," Proc., 2nd International Conference on Environmental Interactions of Marine Renewable Energy Technologies (EIMR 2014), 28 April - 2 May, Stornaway, Isle of Lewis, Scotland (2014). |
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28 Apr 2014 ![]() |
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Integrated instrumentation packages designed for operation at marine renewable energy sites have the potential to reduce the risk uncertainty around high- priority interactions between stressors and receptors. Such packages can leverage the competitive strengths of individual instruments and reduce risk in a rapid, cost-effective manner. One emerging example of environmental infrastructure to achieve these objectives, the Adaptable Monitoring Package, is presented and its capabilities described. The development and adoption of such packages requires close coordination between resource managers, technology developers, and researchers. |
In The News
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Electric maritime company comes to Anacortes GoSkagit (Skagit Valley Herald), Julia-Grace Sanders A new Anacortes, WA, company hopes to design and manufacture components for electric maritime vessels in Skagit County. Andy Stewart comments on the environmental and economic benefits of research and commercial vessels. |
27 Dec 2018
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Underwater sensors for monitoring sea life (and where to find them) UW News, Sarah McQuate Harvesting power from the ocean, through spinning underwater turbines or bobbing wave-energy converters, is an emerging frontier in renewable energy. |
13 Dec 2018
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The preposterous world of human-powered submarine racing Popular Mechanics, Jay Bennett A human-powered submarine is so ridiculous and impractical that outside of the International Submarine Races competition, they are virtually nonexistent. A team of UW students participated. |
9 Aug 2017
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Inventions
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Methods and Systems for Six-degree-of-freedom Haptic Interaction with Streaming Point Data Patent Number: 9,753,542 Howard Chizeck, Fredrik Ryden, Andy Stewart |
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Patent
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5 Sep 2017
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Methods, articles of manufacture, and devices related to generating six degree of freedom (DOF) haptic feedback are provided. A computing device can receive first depth data about an environment. The computing device can generate a first plurality of points from the first depth data. The computing device can determine a virtual tool, where the virtual tool is specified in terms of a translation component for the virtual tool and a rotation component for the virtual tool. The computing device can determine a first force vector between the virtual tool and the first plurality of points. The computing device can send a first indication of haptic feedback based on the first force vector. |
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An Adaptable Monitoring Package for Marine Environmental Monitoring Record of Invention Number: 47352 Brian Polagye, James Joslin, Ben Rush, Andy Stewart |
Disclosure
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21 May 2015
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Virtual Haptic Fixture Tools Record of Invention Number: 46853 Howard Chizeck, Kevin Huang, Fredrick Ryden, Andy Stewart |
Disclosure
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21 Feb 2014
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