System design of a unique magnetic attitude and spin control subsystem
Robert W. Fulcher, United States. National Aeronautics and Space Administration, Goddard Space Flight Center
National Aeronautics and Space Administration, 1970 - Technology & Engineering - 20 pages
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0.3-G perigee field 4-RPM CONTROL FIELD air core coil Aluminum wire angular angular momentum ASCS magnetometer attitude and spin Attitude Control automatic turn-on average torque output Cnil coil drive coil resistance constant level system depicted in Figure drive power requirements earth's field energized feature Figure 14 ft/ft GAUSS 4-RPM CONTROL Goddard Space Flight Greenbelt gyroscopic precession high field levels involving elliptical orbits lb/ft magnetic field magnetic system Magnetic Torquing magnetometer signal meet unusually stringent MEMR OUTPUT DYNE mode torque-meter testing output torque peak value percent torque ripple Performing Organization perigee torque perpendicular RECTIFIED SINE WAVE rms torque ripple rotating field shown in Figure sine drive system sinusoidal Space Flight Center spacecraft spin axis spin axis orientation spin control subsystem SPIN MODE MECHANIZATIONS spin rate control static torque developed torque measurement turns are chosen two-channel constant level Two-Channel System unusually stringent weight waveform weight and drive weight and power yields Wc