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High-Altitude Space Launch Study 2013

Explore effects of atmosphere and space on sensors with SHM techniques in stratosphere and troposphere. Launch with balloons and rockets aids in reducing satellite launch costs. Data collected for structural health monitoring.

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High-Altitude Space Launch Study 2013

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  1. NMT Space Launch Spring 2013 • 20 km & up • -55oC to -46oC • Stratosphere 3-4Hours Balloon Release Chute Deploy Joseph MacGillivray (Lead), Levi Magnuson, Lloyd Puckett, Karen Quezada, Sam Chesebrough, JacleneGutierrez, and Cameron Lucas • Tropopause • 11 to 20 km • -55oC Ascent (5 m/s, 1 Hr) Descent (7 m/s, 0.4 Hr) • Troposhpere • 0 to 11 km • 15oC to -55oC • Background and Objective • Purpose • Study the little-known effects of the atmosphere and space on piezoelectric sensorsusing structural health monitoring (SHM) techniques. • Importance • SHM could significantly reduce cost of satellite launches by reducing pre-flight testing time and localized damage detection of loose bolts and cracks. • Solution • The team will launch SHM experiments on High-Altitude Balloon and Sub-Orbital Rocket. This proof-of-concept flight will pave the way for SHM integration on commercial and defense satellites. • Data will be collected before, during, and after flights to ascertain the structural state of several key points on the experiment. Design Results – Balloon Launch Release Landing • Wireless • Wireless proof-of-concept success • Impedance • Microcontroller issue prevented useful data • WID3 unfit for continued use • Wave Propagation • Successful proof-of-concept; confirms known physics • Figure 5 shows Temperature dependence for pulse-speed propagation. These shifts will need to be accounted for in the suborbital data analysis. Wireless Hub Plate Impedance Hub Plate Impedance Sensors Wave Sensor Plate Wave Hub Plate Figures 5: Life-Cycle Wave Propagation Data Figure 3: Prototype Canister Design • Wireless • Collect Wireless • Four wireless strain gauges • Sensors read/report strain, temperature, and pressure changes during launch • Conclusion • Previous Work – Design & Prototype Complete • Objective – Codify Space Environment Effects • Product Specifications – Survive & Collect Data • Program Plan – Suborbital Launch in Spring • Results – Structure, Wireless, and SHM • Impedance • Collect Sensor Data • Corresponds to sensor’s resistance to motion • Data plots Impedance (Ohms) vs. Frequency (kHz) Figure 1: Balloon Launch Profile (Left), Rocket Launch Profile (Right) Previous Work • Background • Precursor Experiment launched Spring 2011 • Collected data demonstrated that quantified space environment effects SHM data. • Further analysis was required, spawning this year’s experiment. • Wave Propagation • Collect Signal Data • Corresponds to wave propagation of signal (change) • Data plots Voltage (V) vs. Time (µsec) • Future Work • March 2013 • Professional Journal Paper Review • Final Data Analysis - Balloon • April 2013 • Sub-Orbital Rocket Launch • Preliminary Data Analysis - Rocket Figure 2: Previous Experiment • Acknowledgements: Dr. Zagrai, Chris White, Ben Cooper, Jon Schlavin Figures 4: Sensor Plate, Metis HubTouch, Sensor Data

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