Colorado Space Grant Consortium Gateway To Space ASEN 1400 / ASTR 2500 Class #24 Gateway To Space ASEN 1400 / ASTR 2500 Class #24 T-16

-Announcements - Guest Lecture – Spacecraft Structures -Launch is in 16 days Today:

4 Announcements… Propulsion Talk… - What did you think? Design Document Rev C - Due at 12 PM Launch Readiness Review - Due at 7 AM - Presentation order… > 8, 6, 7, 3, 5, 1, 2, and 4 - Template on the website

Test Results (3 minutes) –Prove your project is ready for flight –Heart of your presentation –Show test data (graphs, charts, etc) that are labeled, with key events indicated –Structural tests should be included but equal time should be devoted to mission/science tests (present mission/science test first) –Proof should be shown that you have actually recorded, off-loaded, and analyzed your data

6 Announcements… Ready for Flight Cards - Don’t lose this only copy - Must turn in on 11/30 - Use as a checklist - Follow it exactly - Not fully completed, your team doesn’t fly

Colorado Space Grant Consortium Tuesday 11/27… LRR Presentations Presentations due 7:00 AM 4 days to launch Tuesday 11/27… LRR Presentations Presentations due 7:00 AM 4 days to launch

Colorado Space Grant Consortium Thursday 11/29… Launch Logistics Friday meeting time sign up 2 days to launch Thursday 11/29… Launch Logistics Friday meeting time sign up 2 days to launch

Colorado Space Grant Consortium Friday 11/30… BalloonSat Turn in RFF Cards Turn in 30 minute turn in times Completed by 3:00 PM 1 day to launch Friday 11/30… BalloonSat Turn in RFF Cards Turn in 30 minute turn in times Completed by 3:00 PM 1 day to launch

Colorado Space Grant Consortium Saturday 12/01… Launch! Leave Boulder at 4:45 AM Arrive ~5:45 AM Saturday 12/01… Launch! Leave Boulder at 4:45 AM Arrive ~5:45 AM

Colorado Space Grant Consortium T-16 Mission Simulations ASEN 1400 / ASTR 2500 Class #24 Mission Simulations ASEN 1400 / ASTR 2500 Class #24

Payload Handlers: - Bring you payload to the front of the class - Tell us about - Demo something with it - Let them run for until ~10:35

Colorado Space Grant Consortium Spacecraft Structures Heather Reed LASP (Laboratory of Atmospheric and Space Physics) Spacecraft Structures Heather Reed LASP (Laboratory of Atmospheric and Space Physics)

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?

23 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager Lifecycle of a Structure REQUIREMENTS (NEEDS) DESIGN ANALYSIS BUILD TEST INTEGRATION STUDENT NITRIC OXIDE EXPLORER (SNOE)

24 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager REQUIREMENTS What does this spacecraft structure need to do? Accessability Lift points –Vibe –Acoustic –Shock »Thermal »Radiation ROCKET LAUNCH GROUND TESTING ON-ORBIT CONDITIONS

25 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager DESIGN – What shape will it be? SNOE was a “spinner”

26 Nov 15 th, 2012 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

27 Nov 15 th, 2012 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)

28 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager SPACECRAFT ROCKET NOSECONE ROCKET SECONDARY STAGE DESIGN – Will it fit? Solid Modeling

29 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager Solid Modeling - SolidWorks

30 Nov 15 th, 2012 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:

31 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager BUILDING IT – Your best laid plans Fabrication – Do 2 planes meet perfectly?

32 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager Why TEST? Vibration Testing Thermal Vacuum Testing Acoustic Testing Shock Testing Strength Testing NASA Goddard Gold Rules: TEST AS YOU FLY, FLY AS YOU TEST

33 Nov 15 th, 2012 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

34 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager TESTING – Thermal Vacuum More heat 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

35 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager INTEGRATION to the Pegasus

36 Nov 15 th, 2012 Spacecraft Structures Heather Reed, ME Manager Secondary Structure – Solar Arrays

37 Nov 15 th, 2012 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 Program Management on grants

The PF Package Langmuir Probe and Waves (LPW) – LASP / SSL LPW/Extreme Ultra-Violet (LPW-EUV) – LASP LPW-EUV

39 Nov 15 th, 2012 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

40 Nov 15 th, 2012 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