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Client Alan Cassell at NASA AMES Faculty Advisor Jay McCormack Mentor Greg Swanson Team Members Matt Arnone, Nick Harris, Matt Hinkelman , Jay Hirata, Matt Mihelish , Alex Swanson. MicroMeteoroid and Orbital Debris Detection. Project Description.
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Client Alan Cassell at NASA AMES Faculty Advisor Jay McCormack Mentor Greg Swanson Team Members Matt Arnone, Nick Harris, Matt Hinkelman, Jay Hirata, Matt Mihelish, Alex Swanson MicroMeteoroid and Orbital Debris Detection
Project Description • Electronic Hit Indicator (EHI) testing • Micro Meteoroid and Orbital Debris (MMOD) impact testing • Test fixture • High speed data acquisition • Graphical User Interface (GUI) • Finite Element Analysis (FEA) simulation Photo from NASA.gov Broken Space Shuttle Endeavor tile Photo from NASA.gov Columbia 2003 Orion Space Capsule
EHI Sensor Current takes the path of least resistance
Potential Integration Points - Forebody TPS - Backshell TPS - Service Module Extension
Specifications and Deliverables • Test Fixture • Hold and EHI at a specified distance from the material being tested • Support for testing different configurations of thermal protection systems and EHI’s • Easily and quickly mount to the 17 caliber gun at the White Sands Test Facility • Hardware • High speed (> 1MHz) • 128 trace sensor size • Plug and play • Software • Display impact data in a meaningful way • Save data for future analysis
Test Fixture Design Cont. Service Module Extension Steel Support Rods Aluminum Clamping Plates Electronic Hit Indicators (EHI) Steel Back Plate Sheet Metal Backing Thermal Protection System (TPS) Aluminum Collars
Test Layout To achieve the velocity necessary to simulate an MMOD impact, a 17 caliber 2-stage light gas gun is used. With this gun, the projectile is capable of reaching a velocity of 7 km/s using a 3.4 mm projectile.
Design Choices • Processing • FPGA • Microcontroller • GUI • Web Based • Windows/Linux • Data Storage • On-Board • Streaming • Data Transfer • USB • RS-232 • Ethernet
Lessons Learned • Carbon fiber process • PCB layout can be difficult • The EHI sensor is a promising and viable technology