Common Senior Design Project Senior Design Bonanza 18
Common Senior Design Project “Senior Design Bonanza” 18 September 2017 Nick Leathe / 2616 Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U. S. Department of Energy’s National Nuclear Security Administration under contract DE-NA 0003525.
Schools and Mentors Involved School SNL Mentor CU Boulder Mike Ross / 1553 Brian Macumber / 2616 Fort Lewis College Ed Holman / 1342 Karl Walczak / 2616 University of Georgia Matthew Mc. Dowell / 9432 Sam Moran / 9435 Howard University Tim O’Hern / 1512 University of Texas Michelle Pang / 9433 NC A&T Carl Rhinehart / 2256 Texas A&M Jeff Dohner / 9432 University of Akron Adam Brink / 1526 Rochester Institute of Technology Nick Leathe / 2616 Devin Lachowsky / 9433 Daniel Petersen / 2613
Project Overview and Context § Vacuum Sensor Scope § The vacuum sensor acts as a mechanical switch to sense when a rocket/missile has breached the atmosphere § It behaves as a safety mechanism to prevent energy from passing deeper into a system § Why mechanical and not electrical? § Mechanical components are trusted to have predictable behavior in abnormal environments
Projects Requirements Discussion § The switch must sense a rocket launch environment to enable the vacuum sensor final contact closure § The maximum acceleration from the launch profile may vary between 20 g and 27 g § After sensing launch, the pressure sensing device must actuate before an absolute pressure of 10 -6 mm Hg but not before a pressure of 10 -1 mm Hg § The switch will only be required to close a single electrical channel with a maximum resistance of 0. 2 Ω § This electrical channel will be required to carry a load of 30 VDC with a 15Ω load in series down stream for a maximum of 15 seconds § Once the channel is closed, the channel must stay closed § Device should be entirely mechanical for sensing vacuum environment § The mechanical envelope for the device must be bolted (bolt pattern TBD) and fit within the volume depicted below § Hardware delivery to Sandia/NM by April § Resettable after actuation for testing purposes Mechanical Envelope
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