| 摘要 |
1,146,023. Automatic attitude control. BOLKOW G.m.b.H. May 20, 1966 [May 28, 1965], No.22474/66. Heading G3R. In a system for automatically maintaining a body in a desired attitude, signals from a proportional rate of change of attitude detector are amplified and compared with step function signals generated by a change of attitude detector so that only differences exceeding a predetermined value cause attitude correction. As applied to an electrical system for maintaining the attitude of a satellite fixed relative to a star or the sun, one detector responds to angular deviations and produces a first signal which increases in steps with the deviation and another detector produces a second signal proportional to the rate of change of deviation. The second signal is suitably amplified and subtracted from the first. Whenever the difference exceeds a predetermined value a controller is operated to apply a torque of a fixed value in the appropriate sense to correct the attitude of the satellite. The effect of the number of steps in the first signal, the values of deviation at which they occur, and the amount of amplification of the second signal to produce a desired response are discussed in detail. |
