1. TRIO-CINEMA 1 UCB, 10/8/2010 Chassis & Avionics Stack Design Jerry Kim Mechanical Engineering Space Sciences Laboratory University of California, Berkeley

2. TRIO-CINEMA 2 UCB, 10/8/2010 Agenda Chassis Redesign Specs SW Models Mock-Ups Issues Avionics Stack Redesign MICD Mock-Ups Future Assignments

3. TRIO-CINEMA 3 UCB, 10/8/2010 Chassis Redesign CINEMA Mag Side Dec. 2009CINEMA Mag Side Aug. 2010 2 Patch Antennas No Sun Sensor Mount Holes No UHF Antenna Cutouts 1 Patch Antenna Sun Sensor Mount Holes UHF Antenna Cutouts

4. TRIO-CINEMA 4 UCB, 10/8/2010 Chassis Redesign (cont.) CINEMA STEIN Side Dec. 2009 CINEMA STEIN Side Aug. 2010 2 Patch Antennas No UHF Antenna Cutouts 1 Patch Antenna UHF Antenna Cutouts

5. TRIO-CINEMA 5 UCB, 10/8/2010 Chassis CubeSat Specs Credit: CubeSat Design Specification Rev. 12, The CubeSat Program, Cal Poly SLO

6. TRIO-CINEMA 6 UCB, 10/8/2010 Chassis Assembly Mock-Up Model (Aug. 2010)Flight Model (Aug. 2010)

7. TRIO-CINEMA 7 UCB, 10/8/2010 Chassis Top Mock-Up Model (Jan. 2010) Mock-Up Model (Aug. 2010) End-Tabs UHF Cutouts No End-Tabs Asymmetric Screw Locations Larger UHF Cutouts

8. TRIO-CINEMA 8 UCB, 10/8/2010 Chassis Bottom and Sides Mock-Up Model (Jan. 2010)Mock-Up Model (Aug. 2010) End-Tabs No Sun Sensor Mount Holes Side UHF Antenna Cutouts No End-Tabs Sun Sensor Mount Holes Bottom UHF Antenna Cutouts

9. TRIO-CINEMA 9 UCB, 10/8/2010 Chassis End-Plate (+y) Mock-Up Model (Jan. 2010)Mock-Up Model (Aug. 2010) “End-Tab” Design Symmetric Screw Locations “No End-Tab” Design Asymmetric Screw Locations

10. TRIO-CINEMA 10 UCB, 10/8/2010 Chassis End-Plate (-y) Mock-Up Model (Jan. 2010) Mock-Up Model (Aug. 2010) “End-Tab” Design Symmetric Screw Locations Mass-Reducing Cutout “No End-Tab” Design Asymmetric Screw Locations Avionics Stack Mount-Holes No Cutout (for S-Band)

11. TRIO-CINEMA 11 UCB, 10/8/2010 Chassis End-Plate Mock-Up (-y) side(+y) side

12. TRIO-CINEMA 12 UCB, 10/8/2010 Chassis Assembly Mock-Up

13. TRIO-CINEMA 13 UCB, 10/8/2010 Chassis Issues (Rail Cutouts) “At least 75% of the rail shall be in contact with the P-POD rails” (2.2.13) Last calculation ~15% missing

14. TRIO-CINEMA 14 UCB, 10/8/2010 Chassis Issues (Recessed End-Plate) “All components shall not exceed 6.5 mm normal to the [Z face]” (2.2.6) Components on the Z side must rest below the surface of your standoffs

15. TRIO-CINEMA 15 UCB, 10/8/2010 Chassis Issues (Rail Screws) The rail contact areas is to have a level surface Recess screws Issues with debris, especially if staking compound used for the screws “At least 75% of the rail shall be in contact with the P-POD rails” (2.2.13)

16. TRIO-CINEMA 16 UCB, 10/8/2010 Chassis Issues ( Top/Bottom & Sides Joint ) “The edges of the rails shall be rounded to a radius of at least 1 mm” (2.2.11) Should work but won’t know until fit-check

17. TRIO-CINEMA 17 UCB, 10/8/2010 Avionics Stack Assembly Previous ModelCurrent Model 2 Avionics Bulkheads Hex Standoffs Mounting bosses MPS design Single Bulkhead (PCB-shaped) Threaded Rod & Spacers Fitted MPS design End-Plate Mount RBF bracket

18. TRIO-CINEMA 18 UCB, 10/8/2010 Avionics Stack MICD (1)

19. TRIO-CINEMA 19 UCB, 10/8/2010 Avionics Stack MICD (2)

20. TRIO-CINEMA 20 UCB, 10/8/2010 Avionics Stack MICD (3)

21. TRIO-CINEMA 21 UCB, 10/8/2010 Avionics Stack MICD (4)

22. TRIO-CINEMA 22 UCB, 10/8/2010 Avionics Stack MICD (5)

23. TRIO-CINEMA 23 UCB, 10/8/2010 Avionics Stack MICD (6)

24. TRIO-CINEMA 24 UCB, 10/8/2010 Avionics Stack MICD (7)

25. TRIO-CINEMA 25 UCB, 10/8/2010 Avionics Stack MICD (8)

26. TRIO-CINEMA 26 UCB, 10/8/2010 Avionics Stack MICD (9)

27. TRIO-CINEMA 27 UCB, 10/8/2010 Avionics Stack MICD (10)

28. TRIO-CINEMA 28 UCB, 10/8/2010 Avionics Stack Assembly Mock-Up

29. TRIO-CINEMA 29 UCB, 10/8/2010 Future Assignments Chassis Chassis Top Mock-Up Simplify design (easier to machine) Cal Poly Fit-Check Add cutouts as needed Avionics Stack Remaining parts expected by Oct. 18 Assembly Practice Harnessing Practice (with Chassis Mock-Up)

30. TRIO-CINEMA 30 UCB, 10/8/2010 Questions? Thank You!