Transcript Team Name
Faculty: Robert Philbin (PI), Judy MacLaren, Cindy Clements Students: BalloonSat: Daniel Alvarado, LaKeisha Forte Robot Challenge: Onorio Franco, Edgar Meraz, Zachary Scott Advisors: Gillian Hart, Desi Maxwell, Earl Nesbitt, Karen Howl, Brian Sanders, Bill Hardwicke, Randy Emmons September 10, 2011 TSJC Activities BalloonSat Extremophile Collection November 6, 2010 Windsor launch 5th Annual Robot Challenge Flipper-wheeled robot Extremophile Collection Primitive prokaryotes –variety of archaea and bacteria ~ Janibacter hoylei, Bacillus isronensis, and Bacillus aryabhata (ISRO-sponsored balloon flight, ref.) Two students with Biology backgnd Keep Engineering Simple, Students = use last year’s design = AirCore™-like in-situ culture Sterile enteric agar coating in tube Extraction w/o contamination Flight Data From P(t) and T(t), compute density from ideal gas law Multiply by tube volume gives mass of gas in tube at any altitude Thanks to Anna Karion and Jack Higgs At NOAA for sharing their data from their iMet-1 radiosonde. Thanks to EOSS for altitude data. Results Observations and Big Question Successfully incubated multiple different bacteria, but no definitive identification Successfully demonstrated sterile technique, but only in some of the tube sections Did we collect extremophiles? ¿ impossible to tell ? BQ: How do we discern with high confidence that cultured microbes are from high-altitude and not contaminants? th 5 Annual Robot Challenge at Great Sand Dunes Design Criteria Fine sand gets into mechanics and electronics Navigating via compass vs to/from beacon: ¿ Magnetite throws off compass readings ? Limited traction difficult to maneuver Disaster avoidance and recovery Brainstorming Day How do we beat the sand? Wheel Design Spiral to Push off Sand (never really tested) Open to avoid sand buildup Problems twigs reverse digs into sand DELRAM – lighter, stronger Closed Wheel Structure No digging in reverse Flexibility helps push through sand Chassis • “V” shape allows rock climbing • Low c.g. reduces tip-over • Encases chains and motors • Problems • Low clearance • Unable to mount motors • Hard to access for fixes • Small platform for boards • Trapezoid • Higher clearance • More accessible Program Use Basic Stamp with minimum #boards, #sensors, #motors Simplifies programming and debugging Reduces weight and power demand Memory ~ $$$ and overload -> program failure Faster response time th 4 Annual Robot Challenge Original concept from 1929 Fordson “Snow Machine,” later reincarnated as the “Zil Screw Drive” and then as the Tyco Terrain Twister 5 Parallax BOEs Control board Motor controller Compass/accelero 2 whisker/IR-sensors th 5 Annual Robot Challenge 3 Parallax BOEs Control board Motor controller Compass/accelero 2 whisker/IR-sensors Arduino board Lessons & Future Directions Parallax Propeller BalloonSat Astrophotography