Attitude control system

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244166, B64G 132

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active

049166220

ABSTRACT:
An attitude control system using magnetic torquing is enhanced using a momentum wheel which is pivoted if the sensed error signal about the roll axis exceeds a given threshold. The momentum wheel is pivoted under control of a stepping motor through a first angle proportional to the detected average roll error, and one-half nutation period later through an equal angle in the same direction. Alternatively, the momentum wheel is pivoted over first and second angles of different values wherein the difference is related to nutation.

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patent: 4728062 (1988-03-01), Hubert
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"The Application of Magnetic Attitude Control to a Momentum-Biased, Synchronous Communications Satellite", AIAA Guidance and Control Conf., Boston, MA, Aug. 20-22, 1975, by G. E. Schmidt, Jr.

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