1 / 34

Team SCREAM Final Presentation

Team SCREAM Final Presentation. Joshua Yeaton, Kevin Dinkel , Conrad Schmidt, Christopher Warren, Christopher Kopacz 12/4/08. Mission Overview.

Download Presentation

Team SCREAM Final Presentation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Team SCREAMFinal Presentation Joshua Yeaton, Kevin Dinkel, Conrad Schmidt, Christopher Warren, Christopher Kopacz 12/4/08

  2. Mission Overview The primary mission of Project SCREAM shall be to create a satellite in compliance with the RFP to ascend to an altitude between 25,000 and 30,000 meters to measure the difference between the audibility of sound at launch altitude and the maximum altitude achieved by the satellite. The secondary missions of Project SCREAM shall be to acquire photos of the curvature of the Earth, measure the internal humidity of the satellite, measure internal and external temperature, and measure altitude and flight path of the satellite.

  3. Design Overview • 5 main systems on-board • Camera • Heater • GPS • HOBO • Sound System

  4. Camera The camera was modified to take pictures every 21 sec and wired to be turned on and off by an external switch.

  5. Heater The heater was connected to three Lithium Ion 9V batteries.

  6. GPS • The GPS module ran off of two lithium ion batteries and consisted of a miniSD card logger for data storage.

  7. HOBO • The simplest component of the payload, the HOBO measures external and internal temperatures as well as internal relative humidity.

  8. Sound System The MP3 flight file recorded on the voice recorder is then transferred to a PC . MP3 The tone is recorded by the voice recorder, found on the opposite end of the chamber, for the entirety of the flight The chromatic tuner emits a sound (261.33 Hertz middle C) at set intervals through a sound chamber. The MP3 file is then analyzed with Audacity software. Decibel readings during every three minute interval will be examined for the emitted tone and its harmonics.

  9. Recorder 12 V Battery Recorder Power Switch GPS 9 V Battery 9 V Battery 9 V Battery Timer Switch Speaker Heater External Temp Camera Power Source HOBO Camera Speaker Power GPS Power Source Switch Camera Memory

  10. Proposal Differences • Addition of a GPS unit as one of the science missions • Scrapped HOBO pressure sensor. • Used a glass filter in place of Plexiglas for viewport for camera.

  11. Camera Data • Camera complete success

  12. GPS Data • Also Complete Success • GPS Data Falls Off at 24,200 meters – main mission to determine altitude at which this unit cannot function.

  13. HOBO Data • Indicates Exterior Temperatures as low as -90 degrees F. • Interior as low as 10 degrees F, only above 32 for a short period of time.

  14. Internal Temperature

  15. External Temperature

  16. Flight Diagram Preflight Noise Ascent Ascent Descent Launch Timing Circuit Failure Burst

  17. Shutter Sound Diagram B(7) Tone Shutter Sound

  18. Failure Analysis • Battery for timing circuit failed. Extreme cold likely as cause. • Tested voltage applied by 12 V battery: 0 V. At room temperature and during cold test, system had no problems lasting for 3 hours. • Replaced battery and sound system worked again.

  19. Repairing Failures • Will wire another 12 V battery in series to make two batteries. • Move batteries closer to heater. • Turn on heater earlier – internal temperature needed more of a buffer before beginning flight.

  20. Conclusions • Our GPS receiver does not function above 24,200 meters. • We acquired excellent pictures of the curvature of the Earth • 12 V batteries fail at too cold of a temperature.

  21. Conclusions (cont) • Sound Data – although the tuner failed, the camera provided usable data. • As altitude increases, the audibility of sound decreases on a linear curve. • With exterior temperatures around -70 degrees C, it was impossible to keep interior temperatures above 0 degrees C.

  22. Lessons Learned • Would test batteries at lower temperatures. • Cold test earlier on in development cycle. • Turn on heater for satellite earlier. • Begin box construction earlier. • Make sure that all hardware is acquired EARLY.

  23. Ready for Flight • Store payload without batteries attached to any system. • No other special storage requirements. • To reactivate: GPS batteries charged by connecting GPS circuit board to computer via USB • Attach all batteries. • GPS and tuner must be activated from inside payload – tuner is powered on then tone activated, GPS has a switch.

  24. Appendix

  25. RFP Compliance • Team SCREAM shall comply with the following RFP requirements: • An additional science experiment is installed inside of the BalloonSat involving the measurement of sound amplitude as a function of altitude. COMPLETED • After flight, the BalloonSat shall be turned in working and ready to fly again. READY TO FLY AGAIN • The plastic tubing provided shall be installed through the center of the satellite so that it can be easily connected to the balloon tether. It will be connected in such a way that it will not pull through the BalloonSat or obstruct the flight string. COMPLETED • With the heater provided and the layout of our design, the BalloonSat’senterior will not go below the minimum temperature of 0 degrees celcius. FAILED DUE TO EXTREME EXTERIOR TEMPERATURE • The entire electronic system, with the exception of the external temperature probe, will remain within the main structure of the BalloonSat. COMPLETED • Our total weight shall not exceed a total of 1000 grams. 960 GRAMS • We will acquire the ascent and descent rate of the flight string using data from our internal GPS system. DATA ACQUIRED • The Balloonsat design allows for a HOBO H08-004-02 that is 68x48x19 mm and 29 grams. COMPLETED • The Balloonsat design allows for external temperature cable. COMPLETED • The Balloonsat design allows for an Canon A570IS Digital Camera that is 45x75x90mm and 220 grams. COMPLETED • The structure of the satellite shall consist of foam core, insulation, and aluminum tape. COMPLETED • Contact information and a United States flag shall be visibly displayed on the exterior of the satellite. COMPLETED • All parts were ordered using Chris Koelher’s CU mastercard, and thus, all hardware is property of the Colorado Space Grant Consortium and will be returned to the Colorado Space Grant Consortium at the conclusion of the semester. COMPLETED • No one shall get hurt during the design or launch of the BalloonSat. COMPLETED • The satellite shall be in working condition within one week of launch on 11/15/2008. COMPLETED • A final report shall be submitted and a presentation given involving the final design and results of Team SCREAM’s mission. TO BE COMPLETED

  26. Mass and Cost

  27. Message to Next Semester • Start work early. • If you are getting parts from a source other than Space Grant, be sure to get them early or get very accurate estimates of volume and mass. • Cold Test – be sure to get the payload very cold and test battery life rigorously at these temperatures.

More Related