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*
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: m^3 ( m diameter x 2 m)
AAE450 Senior Spacecraft Design 2/15/2007 Scott 3 CS2, CS3 Power: –16.75 kW Mass: – kg (Array, Batteries, Wires, Power Converters) Volume: – m^2 by 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
AAE450 Senior Spacecraft Design 2/15/2007 Scott 4 Back Up Slides
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 mm^2 diameter mm (1) DC-resistance Ohm/m weight kg/km (Cu) weight kg/km (Al) An = pi/4d^2 = mm^2X92^((36-n)/(19.5)) current = voltage / resistance
AAE450 Senior Spacecraft Design 2/15/2007 Scott 6 Power (W) 0 AWG neededkg/km (cu)kg/km (al)Area mm^
AAE450 Senior Spacecraft Design 2/15/2007 Scott 7 Retractable Power Cord on TV
AAE450 Senior Spacecraft Design 2/15/2007 Scott kg (Panels) + 4kg (wires/converters) + 58 kg (Batteries) CS2, CS3
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 Wiley J. Larson and Linda K. Pranke. “Human Spaceflight” McGraw-Hill Higher Education, (2006) January 20, 2007http:// (2006) January 18, 2007http:// (2006) January 18, Krishna C. Mandal (2005), T html. Januray 19, T html
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. new.jpl.nasa.gov/dspace/bitstream/2014/37746/1/ pdf. January 17, 2007http://trs- new.jpl.nasa.gov/dspace/bitstream/2014/37746/1/ pdf Christopher T. Russell. w.pdf. January 17, w.pdf Spectrolab inc. January 15, Nasa. 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