1 / 42

KS-NSB-1 PDR Lexington, KY 30 June 2008

KS-NSB-1 Preliminary Design Review. KS-NSB-1 PDR Lexington, KY 30 June 2008. http://www.kysat.com. Presentation Overview. Introduction and System Overview Main Payload Software Engineering Continuous Wave Beacon Camera Package Airframe Mass and Power Budgets Schedule. Overview.

jeanbennett
Télécharger la présentation

KS-NSB-1 PDR Lexington, KY 30 June 2008

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. KS-NSB-1 Preliminary Design Review KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  2. Presentation Overview • Introduction and System Overview • Main Payload • Software Engineering • Continuous Wave Beacon • Camera Package • Airframe • Mass and Power Budgets • Schedule

  3. Overview Samir Rawashdeh KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  4. Intro and System Overview Mission Goals and Desired Outcomes: • To learn how to build, launch and track balloons. • To learn how to design a system as a team, implement it and deploy it. • To test technologies for future missions. • Training the KySat08 team on relevant technologies and design processes.

  5. Intro and System Overview Project Circumstances: • Distributed Team • Three weeks to design, build, and integrate

  6. Main Payload Jason Bratcher KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  7. Main Payload Block Diagram

  8. Schematic

  9. Software Engineering Nate Rhodes KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  10. Flight Software Overview • Space Express on a balloon • Same organization / structure as SE • Instead of “read transmit, read transmit” now “read store, read store” since we plan on recovering the payload • Update drivers (I2C, temp sensor, SPI) to current KySat-1 versions

  11. Control Flow Diagram

  12. Data Format • No radio transmission, therefore no MIME encoding needed • Write data directly SD card • Use SPI drivers from KySat-1 • Use file system interface from KySat-1

  13. Summary • Use organization from SE • Reading of sensor arrays • Packaging data • Use drivers from KySat-1 • I2C bus • SPI bus • File system

  14. Continuous Wave Beacon Samir Rawashdeh KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  15. CW Beacon • Requirements • Transmit call sign and pressure data. • Operate at high altitude. • Function as a secondary tracking system. • Transmit for 3-4 hours.

  16. Cricketsat • Provided by Bob Twiggs • 5mW transmitter • 555 timer • Easy to modify for use with pressure sensor and antennas. • Flight heritage

  17. Beacon Keyer • Easy to build, Low cost • Designed by David Robinson who has agreed to help us with programming. • PIC 505 microcontroller

  18. Antenna • 2 half-wave tape measure dipoles • Little cost to build. • Connected via coaxial cable.

  19. Conclusion • Antenna • 35cm mounted vertical • 1m mounted horizontal • Beacon will be recorded and spectral analysis tools used to determine altitude. • This method is easier and requires less time than encoding altitude data on the signal.

  20. Camera Package Anthony or Ty KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  21. Cameras

  22. Canon A570 IS Specs • Can take photos at multiple resolutions: • 3072 x 2304 (7.1MP) • 1600 x 1200 • Price: ~$174 • Has documented flight heritage with CHDK firmware add-on.

  23. Calculations for 3072 x 2304 • Photo size: ~3MB • 2000MB (SD card) / 3MB = 667 photos • 4 hours (est. flight time) = 240 min • 240 min / 667 photos = 1 photo / 22 s

  24. Calculations for 1600 x 1200 • Photo size: ~.32MB • 2000MB / .32MB = 6250 photos • 4 hours = 240 min • 240 min / 6250 photos = 1 photo / 2.3 s

  25. Conclusion • 2 cameras • One mounted on +Z (to Earth) • One mounted on –X (to horizon) • CHDK script settings • Reset. • Set aperture to wide angle. • Set camera focus to manual:infinity.

  26. Conclusion (cont.) • Set JPEG compression to superfine. • Turn off display to save battery life. • Set camera to take a photo every 30 s. • Retain default maximum resolution (3072 x 2304, 7.1MP)

  27. Airframe David Jones KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  28. Airframe Integration

  29. Basic Airframe Concept • Polystyrene sheet • Provides thermal resistance from outer surface, structural rigidity, and shock resistance. • Multi Layer Insulation (MLI) • Provides several layers of thermal resistance to keep the outer airframe surface warm.

  30. Basic Airframe Concept • Foam rubber landing bag • To protect our expensive instrumentation from impact. • Outer abrasion jacket • Rip-stop Nylon cover keeps circuits dry, protects MLI, and provides a means for attaching link lines. • Looks great too.

  31. Component Mounting

  32. Integrated Payload • Drag disk to minimize spinning will allow for better photographic imagery.

  33. Skills needed for assembly • Exacto blading • Hot gluing • Drilling • Bolting • Sewing • Should take one day.

  34. Mass and Power Budgets Jason Bratcher KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  35. Mass Budget

  36. Power Budget

  37. Power Budget cont. • This leaves plenty of leeway for surprises

  38. Schedule Samir Rawashdeh KS-NSB-1 PDR Lexington, KY 30 June 2008 http://www.kysat.com

  39. Schedule • This Week • Place order on parts • Begin camera experiments • Create airframe • Software: Parse magnetometer, MMC file system • Beacon progress? • When parts arrive, begin hardware integration

  40. Schedule • Morehead Week • Complete airframe • Complete main payload integration • Test cameras in freezer • Test ground stations

  41. Schedule • July 13th • Arrive in Bowling Green • July 14th • Launch Balloon !

  42. http://www.kysat.com

More Related