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Mitchell Aerospace and Engineering Mitchell Community College February 13, 2011

Individual Subsystem Testing Report. Mitchell Aerospace and Engineering Mitchell Community College February 13, 2011. Outline of Presentation. Mission Overview. Functional Block Diagrams. Changes from CDR. Project Management and Team Updates. Subsystem Overview. Lessons Learned.

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Mitchell Aerospace and Engineering Mitchell Community College February 13, 2011

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  1. Individual Subsystem Testing Report Mitchell Aerospace and Engineering Mitchell Community College February 13, 2011

  2. Outline of Presentation Mission Overview Functional Block Diagrams Changes from CDR Project Management and Team Updates Subsystem Overview Lessons Learned Conclusions

  3. Mission Overview Nathan Keller

  4. Mission Overview Goal Statement: Our goal is to design and implement various transducers to passively collect energy for possible use for space based instrumentation. We expect to harvest energy from the flight of the rocket, solar and magnetic sources.

  5. Mission Overview Mission Requirements: • For each transducer, voltage across a known resistor will be measured and data will be stored. • Some transducers may require amplification of voltage. • The power used by a customized-in-house (CIH) sensing package will be measured and stored. • Measurable data from the CIH sensing package will be saved.

  6. Expected Results Transducers: • Aubade- less than 5 volts • Grow Hot- 5 volts maximum • Crusher- 5 volts maximum • Diving Board- 5 volts maximum • Elvis- 0-50 millivolts • Bristol- 0-5 volts • Jerk- 0-5 volts • EM Pendulum- 0-5 volts Electrical System: • Collect voltage from transducers • Save data to SD-card CIH Sensing Package: • Collect physical data throughout the flight of the rocket • Save information to SD card

  7. Subsystem Overview- Block Diagram

  8. Subsystem Overview- Block Diagram • The signal from each transducer will travel through an op amp(if necessary) and then a resistor of a known value. • The signal will then input into the Arduino where the voltage will be measured. • Upon receiving power-on from Wallops, the Arduino will begin tracking the time from power on to a predetermined stopping time. • The Arduino will also send a digital signal to the CIH board to bring it out of its idle state. • Both the Arduino and CIH sensing package will store data to an OpenLog data logger.

  9. Changes from CDR Mechanical Gary Staggers

  10. Mechanical Changes Makrolon Plates & standoffs: • Increased the thickness of the plates. • Originally planned to use 1/8” plates, but modified to use 3/16” for added strength. • 5/16” Aluminum Hex standoffs tapped to 8-32 have replaced the original cylindrical standoffs.

  11. Mechanical Changes Transducer Changes: Jerk • Changed tube ID from 3/4” to 5/8”. • Magnet size updated from 3/4” to 5/8”. • Changed springs from stainless steel to copper beryllium. Changes were made to reduce weight, after testing reveals the smaller size is just as effective.

  12. Mechanical Changes Transducer Changes: EM Pendulum • Magnet lengthened to a 1 inch overall length mounted in a ball joint mechanism. • Bowl design has been modified to 4 coils perpendicular to the aluminum cylindrical base. These changes were implemented because the original design was not effective in producing voltage.

  13. Mechanical Changes Transducer Changes: Bristol • Construction altered from aluminum to ABS plastic. • Magnet is a spherical 5/8” neodymium magnet. These changes were implemented to accommodate the 3-D printer at the college.

  14. Mechanical Changes Transducer Changes: Aubade • Dimensions have been adjusted to fit comfortably on the second shelf facing the optical port.

  15. Mechanical Changes Transducer Changes: Crusher • Crusher has been downsized since CDR, due to considerations of weight, cost and space.  • Originally Crusher was designed to be 1” x 1” x 1.5”, and the current design is 2” x 2” x 0.2”.  This reduced volume from 1.5 cubic inches to 0.8 cubic inches, which results in a proportional decrease in weight and cost of production.

  16. Mechanical Changes Transducer Changes: Elvis • Still in development. • Current condenser needs further testing to prove its viability for the project.

  17. Mechanical Changes Transducer Changes: Diving Board • The cantilever has been changed from aluminum to Lexan. • Tensile yield strength of Lexan is higher than 6061 aluminum. • Maximum yield strength of Lexan is 65.8 Mpa, 9543 PSI. • Maximum yield strength of 6061 Aluminum is 55.2 Mpa, 8007 PSI.

  18. Mechanical Changes Transducer Changes: Grow Hot • No changes since CDR.

  19. Changes from CDR Electrical/Software Dylan Stobbe

  20. Electrical Changes • The I2C (inter-integrated circuit), the main protocol for communications between the two microcontrollers, is no longer necessary. • The second Arduino Microcontroller has been removed. • The main Arduino will control the power to the CIH sensing board. • Further testing needs to be done to see which transducers need rectification; Crusher, Aubade, Elvis and GrowHot do not need rectification.

  21. Electrical Changes Sensing Package: • The scope of the project has been broadened somewhat by the switch from an OTS sensing package to a CIH option. • The CIH package will represent the power consumption of a comparable. • In addition to serving as a power comparison, the sensing board will provide useful data regarding the flight profile of the rocket.

  22. Changes from CDR Test Erin Wilson

  23. Test Changes • No changes since CDR

  24. Changes from CDR Safety Erin Wilson

  25. Safety Updates • Safety presentation given followed by a written test. • All students passed with an 80% or better.

  26. Project Management Update Beau Brinkley

  27. Team Photo Back Row (left to right): Brad, Dylan, Colin, Tony, Joseph, John Front Row (left to right): Doug Knight, Gary, Erin, Michael, Nathan, Clint Halsted

  28. Project Management Organizational Chart

  29. Project Management Schedule Update • Currently on schedule with only a few internal work task changes. • Some of the test components arrived behind schedule therefore, manufacturing plan detail revisions have been affected. • In effort to meet schedule demands, Test data will be implemented directly into design revisions rather than formally revising the manufacturing plan.

  30. Subsystem Overview Brad Hager

  31. Subsystems • Jerk • EM Pendulum • Bristol • Aubade • Elvis • Diving Board • Grow Hot • Sensing Board

  32. Jerk Lathe Jerk Winding the Wire Brad Winding wire around Jerk.

  33. Jerk Turning an End Cap Colin

  34. Jerk

  35. Jerk Status: • Prototype completed and flight tested. • Based on flight results, design will be updated to maximize potential output.

  36. EM Pendulum

  37. EM Pendulum Status: • Prototyping dependent on delivery of final materials.

  38. Bristol Housing Magnet Threaded Rods Enameled Copper Wire 30 AWG

  39. Bristol

  40. Bristol Status: • Prototype is fully assembled. • Ready for a prototyping rocket flight with fully functional fin tabs that will simulate rotation.

  41. Aubade

  42. Aubade Status: • During the test flight in broad daylight, 6.70 V were achieved. • The solar cells are mounted in Lexan sheet.

  43. Crusher

  44. Crusher Status: • Testing will be completed this week. • Prototype is complete.

  45. Elvis

  46. Elvis Status: • Testing to be completed. • Changes are anticipated moving forward but test results will dictate route taken. • Biasing of the condenser mic may not follow our pathway of passive energy harvesting.

  47. Diving Board Milling Diving Board Pieces Gary

  48. Diving Board

  49. Diving Board

  50. Diving Board Test Results

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