US Patent No: 5,935,176
Number of patents in Portfolio can not be more than 2000
Momentum wheel oscillation filter
Stats
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Aug 10, 1999
Issued date -
Nov 22, 1996
filing date -
08/754,825
serial no -
Expired
status
Importance
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Abstract
Momentum wheel speed correction in an orbital space vehicle that corrects for the oscillation resulting from spurious variations in the angular velocity of the momentum wheel. The momentum wheel's angular velocity is subject to random fluctuations due to Coulomb forces. These fluctuations are coupled into the vehicle's spin rate causing errors in the yaw rate and yaw. By adding corrective values to the determined yaw rate and yaw by selectively filtering the momentum wheel tachometer signals, pointing errors are substantially reduced or even eliminated.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,020,745 Reaction wheel fricton compensation using dither | 30 | 1989 | |
| 5,058,835 Wheel speed management control system for spacecraft | 31 | 1990 | |
| 5,343,398 Spacecraft roll-yaw compensator with orbit-rate and harmonic bandpass filters | 10 | 1992 | |
| 5,248,118 Spacecraft attitude control system with reaction wheel bearing protection | 18 | 1992 | |
| 5,608,634 Low noise spacecraft body rate sensing arrangement for attitude control | 15 | 1992 | |
| 5,308,024 Disturbance torque compensated three axis yaw control system | 30 | 1992 | |
| 5,610,820 Minimum propellant, zero momentum spacecraft attitude control system | 19 | 1995 | |
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| 5,259,577 Attitude control system for three-axis stabilized satellite in near-equatorial orbit | 20 | 1991 | |
| 5,269,483 Continuously acting one-way satellite roll-yaw attitude control method and device | 15 | 1992 | |
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| 5,184,790 Two-axis attitude correction for orbit inclination | 20 | 1991 | |
| 5,540,405 Method and apparatus for compensating for magnetic disturbance torques on a satellite | 11 | 1993 | |
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| 4,521,855 Electronic on-orbit roll/yaw satellite control | 35 | 1981 | |
| 4,931,942 Transition control system for spacecraft attitude control | 21 | 1988 | |
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| 4,911,385 Attitude pointing error correction system and method for geosynchronous satellites | 26 | 1987 | |
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| 4,294,420 Attitude control systems for space vehicles | 26 | 1978 | |
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| 4,786,018 Satellite attitude control | 8 | 1987 | |
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| 4,567,564 Arrangement for the attitude stabilization of flexible vehicles with weakly-dampened structural vibrations and discontinuous control intervention | 23 | 1981 | |
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| 4,230,294 Closed loop roll control for momentum biased satellites | 30 | 1979 | |