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Dynamic bias for orbital yaw steering

  • US 5,791,598 A
  • Filed: 01/12/1996
  • Issued: 08/11/1998
  • Est. Priority Date: 01/16/1996
  • Status: Expired due to Term
First Claim
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1. Satellite attitude control apparatus for use in a dynamically controlled yaw rotating spacecraft having axes for locating it in physical space and a vector defined in relation to said axes, said apparatus comprising:

  • means for decoupling moments acting on the spacecraft relative to said vector defined in relation to said axes locating the spacecraft in physical space; and

    sensor means, on said spacecraft, for sensing the motion of the spacecraft in two dimensions relative to said vector and producing two-dimensional sensor data indicative thereof;

    means for correcting said decoupled moments in accordance with a control law referenced to said two-dimensional sensor data and producing control signals indicative thereof; and

    means, responsive to said control signals, for providing three-dimensional yaw-steering attitude control relative to said two-dimensional sensor data.

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