Full Mission Simulation Test
Report
JASMM
Virginia Tech
Team Members:
Robbie Robertson
Daniel Martin
Zack Harlow
Matt James
Jeremiah Shiflet
Anthony Rinaldi
Senior Advisors:
Melissa Motylinski
Adam Jones
Jeff Crayley
Sruthi Krishnan
Michelle Perez
May 12, 2010
Mission Overview
•
Objective:
– To fly plug and play hardware from an Air
Force Research Lab Cube Sat Kit
• To demonstrate appropriate Technical Readiness
Level for plug and play satellite system
– To fly an Atmospheric Energetic Observer
(AEO)
• To demonstrate an appropriate Technical
Readiness Level for a new probe and amplifier
system
• To determine the total amount of NO produced in
response to Joule heating and solar flares using
proven high heritage technology
Changes Since Subsystem Integration
•
We still do not know exactly where the optical port is located, so we
have come up with a plan to cut a notch out of our top plate and
create a lowered shelf (a platform that drops down from the upper
plate) for the photometric probe housing so that we have more room
to adjust for window position on-site.
• More programming progress, but worries about getting it finished in
time
• Still need to make ballast, but other than the ballast construction is
complete
Pictures
Test Description
- Completed tests:
- Four subsystem tests have been conducted
- Plug-and-Play Computer System: gumstick computer tested
for keeping data after reboot or power loss
- Power System: tested to see if the design/layout for the
voltage regulator worked properly (payload devices received
proper voltages)
- Photometric Probe: Professor Bailey (whose data the
payload is collecting) performed a thorough testing of
photodiode and filter
- IMU: Output with tranceiver has been tested to verify the type
of output provided by the IMU.
- A test program is being written for the photometric probe.
Test Results: Plug-and-Play
- A file was written to the gumstick computer and then
power to the system was turned off.
- The gumstick computer retained its data after power
loss.
- The plug-and-play system works as planned.
Test Results: Power System
- The test showed that the correct amounts of voltage are
being supplied to each device.
- Design of the system has been completed, but the
system is currently being built.
- The power system will be integrated once completed.
Test Results: Photometric Probe
- The filter properly removes light of undesired wavelength
and its transmission is up to specs.
- Housing front face has been painted to keep all light not
reaching the diode from interfering with proper readings.
- Need to integrate the photometric probe into the
computer system.
- Full system integration tests will be performed once the
software is completed.
Test Results: IMU
- A connection was made to the IMU and output from the
IMU was tested.
- The IMU with tranceiver properly provides a serial data
output.
- Tests to still be completed are analysis of angular
velocities and gravity vectors.
- IMU will be placed on a spin table rotated at a specified
rate, and then IMU output will be compared to the actual
results.
- The software needs to be completed to complete testing
Overall Analysis
• We are not ready for launch.
• Our obstacle is the software. The software
tools provided for us are unfortunately not
working as well as we thought.
• Once the software is completed, we will be
able to do tests.
Lessons Learned
• We should have gotten into the software
development much, much earlier.
• We should have had another electrical
engineer and a computer science student
involved.
• Always try to be ahead of schedule.
• Conclusions
– We are still worried about the window material
and the position of the window.
– The software is taking much more work than
expected and will be a challenge to complete.