1. AAE450 Senior Spacecraft Design 2/15/2007 Scott 1 Ryan Scott Week 5: February 15th, 2007 Power Group Leader TC, TV, dE, aM, dM, aM, CS1, CS2, CS3 *WITH UPDATED NUMBERS AS OF 2/16/2007*

2. AAE450 Senior Spacecraft Design 2/15/2007 Scott 2 TV Power Distribution Spring: –Light weight (due to lack of gravity) –Self sufficient –No power required Motor: –Movement on demand –Used to pull structure together –Most complicated Bunching: – Least complicated –Possible danger of smashing wire –No power Required Power (example): –150 kW Mass (example): –10 MT (cu) –3.2 MT (al) Volume (example): –Wire Area: 2966 mm^2 x 500 m –Spool: 4.0946 m^3 (1.6145 m diameter x 2 m)

3. AAE450 Senior Spacecraft Design 2/15/2007 Scott 3 CS2, CS3 Power: –16.75 kW Mass: – 185.4 kg (Array, Batteries, Wires, Power Converters) Volume: –189.81 m^2 by 0.127 m GaInP Triple Junction Thin Film Solar Cells: –Light weight –Radiation resistance –High output per cell Double Solar Array Design: –Damage tolerant –Higher sun ray collection if motor or rotation malfunction Battery Backup (2 hours): –Celestial body blocking sunlight –Rotational or motor Error –Alien Intervention

4. AAE450 Senior Spacecraft Design 2/15/2007 Scott 4 Back Up Slides

5. AAE450 Senior Spacecraft Design 2/15/2007 Scott 5 Wire Gauge Max Total Watt Power 0 awg3414 watts 1 awg2710 watts 2 awg2151 watts 3 awg1707 watts 4 awg1355 watts 5 awg1075 watts 6 awg853 watts 7 awg677 watts 8 awg537 watts 9 awg427 watts 10 awg339 watts 11 awg269 watts 12 awg213 watts 13 awg169 watts 14 awg134 watts conductor size 0 AWG area 53.475 mm^2 diameter 9.530 mm (1) DC-resistance 0.000329 Ohm/m weight 475.394 kg/km (Cu) weight 144.383 kg/km (Al) An = pi/4d^2 = 0.0126677166mm^2X92^((36-n)/(19.5)) current = voltage / resistance

6. AAE450 Senior Spacecraft Design 2/15/2007 Scott 6 Power (W) 0 AWG neededkg/km (cu)kg/km (al)Area mm^2 1000031392423202 2000062785846404 30000941771269607 400001255701692809 5000015696221151011 6000018835525371213 7000021974729601415 80000231114033831550 90000261253238061752 100000291392542291955 110000321531746522157 120000351671050752359 130000381810254982561 140000411949559212763 150000442088763442966

7. AAE450 Senior Spacecraft Design 2/15/2007 Scott 7 Retractable Power Cord on TV

8. AAE450 Senior Spacecraft Design 2/15/2007 Scott 8 123.38 kg (Panels) + 4kg (wires/converters) + 58 kg (Batteries) CS2, CS3

9. AAE450 Senior Spacecraft Design 2/15/2007 Scott 9 Resourses Dr. Damon F. Landau. “Strategies for the Substained Human Exploration of Mars” Thesis Submitted to the Faculty of Purdue University, Dec. 2006. Wiley J. Larson and Linda K. Pranke. “Human Spaceflight” McGraw-Hill Higher Education, 2006. (2006) http://www.nasa.gov/pdf/167120main_Elements.pdf. January 20, 2007http://www.nasa.gov/pdf/167120main_Elements.pdf (2006) http://www.space.gc.ca/asc/eng/iss/facts.asp. January 18, 2007http://www.space.gc.ca/asc/eng/iss/facts.asp (2006) http://powerweb.grc.nasa.gov/pvsee/publications/wcpec2/cells4mars.html. January 18, 2007 http://powerweb.grc.nasa.gov/pvsee/publications/wcpec2/cells4mars.html Krishna C. Mandal (2005), http://sbir.gsfc.nasa.gov/SBIR/abstracts/03/sttr/phase2/STTR-03-2- T3.02-9919.html. Januray 19, 2007 http://sbir.gsfc.nasa.gov/SBIR/abstracts/03/sttr/phase2/STTR-03-2- T3.02-9919.html

10. AAE450 Senior Spacecraft Design 2/15/2007 Scott 10 Resourses (continued) Kenneth M. Edmondson, David E. Joslin, Chris M. Fetzer, Richard R. King, Nasser H. Karam. http://trs- new.jpl.nasa.gov/dspace/bitstream/2014/37746/1/05-2732.pdf. January 17, 2007http://trs- new.jpl.nasa.gov/dspace/bitstream/2014/37746/1/05-2732.pdf Christopher T. Russell. http://discovery.larc.nasa.gov/PDF_FILES/1_Flight_System_Overvie w.pdf. January 17, 2007 http://discovery.larc.nasa.gov/PDF_FILES/1_Flight_System_Overvie w.pdf Spectrolab inc. http://www.spectrolab.com/DataSheets/TNJCell/utj3.pdf. January 15, 2007 http://www.spectrolab.com/DataSheets/TNJCell/utj3.pdf Nasa. http://search.nasa.gov/search/search?q=GaAs+triple- junction&output=xml_no_dtd&sort=dateADALAd1&site=nasa_collect ion&ie=UTF-8&client=nasa_production&oe=UTF- 8&proxystylesheet=nasa_production. January 21, 2007http://search.nasa.gov/search/search?q=GaAs+triple- junction&output=xml_no_dtd&sort=dateADALAd1&site=nasa_collect ion&ie=UTF-8&client=nasa_production&oe=UTF- 8&proxystylesheet=nasa_production