Colorado Space Grant Consortium Gateway To Space ASEN / ASTR 2500 Class #25 Gateway To Space ASEN / ASTR 2500 Class #25 T+3

-Launch Recap -Now What Do You Do? -Announcements - Guest Lecture – Spacecraft Structures -Launch occurred 2 days ago – Yeah! Today:

Actual:

Launch Recap:

-Who didn’t get pictures? -Who didn’t get any mission data? -Who didn’t get any HOBO data? -Who had a major failure during the flight? -Who lost equipment/hardware? -Who is happy? -Who didn’t have a great time on Sunday? Survey Says…

So you now have launched something into space…

…now what are you going to do?

Now What To Do: - START working with your data (or lack of data) - FULLY UNDERSTAND what happened and WHY

Now What To Do: - VERIFY FAILURES through testing - WORK HARD to understand what the balloon flight told you - DON’T PANIC – You can still get an A if you do the above well (Spider) - HARDWARE turn-in is PREPARE your BalloonSat for re-flight (within reason)

Cole Bostrom, Corey Godwin, Jonathon Kirchmaier, Emily Logan, Sean Murphy, Seanna Renworth Rev D

Design Overview

Heater Motor Camera HB 25 Basic Stamp HOBO

Image Tests The imaging tests were successful in that the camera was able to focus on the mirrors. The window for the camera had to be enlarged so that it had a view of the bottom mirror. After this alteration the platform and camera worked together well. Before Mod After Mod

System Testing: The Camera The camera was tested individually to test its ability to focus on the mirrors and take pictures at five different angles. These tests were successful.

Now What To Do:

- Have a PLAN for your final report and presentation (Presentation – :00 AM) (Report – , & paper with signatures) - DATA, CODE, and BEST 20 PICTURES due on CD on TEAM VIDEO due (under 4 minutes and *.mov, *.wmv, *.mp4, *.mpg formats only) - PREPARE for ITLL Design Expo ( ) You must attend!

Now What To Do:

- HW #7 (Due November 17, :00 PM) - THANK those that helped you (Tim May) - ATTEND class - 11/10Spacecraft Attitude Deter. & Control - 11/15Satellite Tool Kit - 11/17Spacecraft Communication - 11/29Final Presentations #1 - 12/01Final Presentations #2 - 12/06Spacecraft Power and Career Advice - 12/08Final Exam Review plus more - 12/14Final Exam 4:30 to 7:00 PM

Now What To Do: - RE-FLY Forms due CONSIDER your future - Major change? - Space Grant HASP proposal due December 15th > Spot on the team next semester > Possible paid position summer 2012 > More details Thursday - Space Grant Spring Open House JAN 19 th, 2012

Announcements: - Don’t forget about community service by end of the semester - Comments on DD C back next Thursday in class - Website updated (presentation, LRR, DD C, pictures) - EOSS Data on their website soon - Maps, radios, coolers…

Colorado Space Grant Consortium Questions?

Colorado Space Grant Consortium Spacecraft Structures Heather Reed LASP Class #16 Spacecraft Structures Heather Reed LASP Class #16 T-23

Spacecraft Structures Heather Reed Mechanical Engineering Manager Laboratory for Atmospheric and Space Structures

What is a structure? Why does a spacecraft need a structure? PRIMARY or Secondary?

55 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Lifecycle of a Structure REQUIREMENTS (NEEDS) DESIGN ANALYSIS BUILD TEST INTEGRATION STUDENT NITRIC OXIDE EXPLORER (SNOE)

56 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager REQUIREMENTS What does this spacecraft structure need to do? Accessibility Lift points –Vibe –Acoustic –Shock »Thermal »Radiation ROCKET LAUNCH GROUND TESTING ON-ORBIT CONDITIONS

57 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager DESIGN – What shape will it be? SNOE was a “spinner”

58 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager DESIGN – What will it be made out of? Materials selection –Stiffness vs. Strength Car suspension – STRONG CAR, weak connection to the road –WEIGHT  CHEAPEST RIDE TO SPACE = $35,000 per lb –Cleanliness Specific plastics only Materials that can be scrubbed Aluminum is a great material

59 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager DESIGN – How will it be built? Manufacturability –Strongest structure is all one piece –How easy is it to assemble? –Primary structure $$ < 1% of SNOE mission budget ($8M)

60 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager SPACECRAFT ROCKET NOSECONE ROCKET SECONDARY STAGE DESIGN – Will it fit? Solid Modeling –Static or Dynamic

61 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Solid Modeling - SolidWorks

62 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager ANALYSIS - Modal Simulation Results Mode 2 – 821 Hz – Mode shape plot Rocking in the Y-direction Mode 6 – 1270 Hz – Mode shape plot Rocking in the X-direction 821 Hz: First predicted high mass participation mode. 741 Hz: Lowest frequency mode is a local connector bracket mode. Z-axis has very little mass participation below 2000 Hz. Two principal mode shapes shown below:

63 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager BUILDING IT – Your best laid plans Fabrication – Do 2 planes meet perfectly? Assembly – How clean is clean?

64 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Why TEST? Vibration Testing Thermal Vacuum Testing Acoustic Testing Shock Testing Strength Testing Spin Balance Mass properties NASA Goddard Gold Rules: TEST AS YOU FLY, FLY AS YOU TEST

65 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager TESTING – Vibration Testing Mass model testing – Good practice Test sensors - Accelerometers LARGE SPEAKER “VIBE TABLE” AT BALL AEROSPACE SNOE SPACECRAFT

66 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Vibration Test Specification

67 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager TESTING – Thermal Vacuum Less cooling without air – Electronics Thermal expansion – Causing binding More friction without air – Moving parts HOT/COLD Operational and Survival limits SNOE SPACECRAFT LARGE TANK “RAMBO” AT BALL AEROSPACE

68 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager INTEGRATION to the Pegasus

69 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Secondary Structure – Solar Arrays

70 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Heather Reed, CU Mechanical Eng 97’ Work during Undergrad studies, BS ME in 1995 –Space Grant College –NIST, NDE lab –CU football & basketball security –Hart Ranch snack shop Work during Grad studies on SNOE, MS ME in 1997 –FEA, Solar panel substrate, Nutation damper, Torque rods, Thermal blankets Employed at LASP after graduation ME Manager in 2001, 8 ME’s then, 23 ME’s now Current program is MAVEN, mission to MARS Starting Program Management this week

EUV on MAVEN going to Mars Langmuir Probe and Waves (LPW) – LASP / SSL LPW/Extreme Ultra-Violet (LPW-EUV) – LASP LPW-EUV

72 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Testing Engineering Unit testing –Mechanism Life Testing – Vibe, Life Test cycling –Luxel filter qualification – Vibe, thermal cycles –Light leak testing –Torque margins –Spring force –Magnetic field Flight Unit testing –Vibe test Random Vibe, response limit Strength verification = ? –Mechanism Run-in Torque margins Spring force –Light leak testing

73 Nov 8 th, 2011 Spacecraft Structures Heather Reed, ME Manager Aperture Mechanism Life Test Plan 30V 22V 30V 36V 22V 30V 36V 22V 30V 36V 30V 200 Cycles 4280 Cycles -5°C -35°C 35°C 50°C