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Observer Based Design of Normal Mode Attitude Control for IRS Satellite

  • P. S. Goel
  • K. S. Chandra
  • P. Kudva
Part of the Astrophysics and Space Science Library book series (ASSL, volume 127)

Abstract

The attitude and orbital control system for the Indian Remote Sensing (IRS) Satellite to be put into the Sun-synchronous 10 O’clock polar orbit during 1986, has to meet very stringent body rate specifications of the order 0.0003 deg sec-1 in the normal-mode operation. In order to meet these low body rate specifications, an onboard microprocessor based observer is envisaged. Initial design of observer with errors and body rate estimates alone was found to be inadequate in the presence of disturbance torques. It was thus found necessary to modify the observer design in order to estimate the disturbance torques, thereby, improving the estimates of the body rates and attitude errors. In this paper various refinements attempted are examined, and some of the simulation results are presented.

Keywords

Kalman Filter Rate Feedback Body Rate Reaction Wheel Disturbance Torque 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Anderson, B.D.O. and J.B.More: 1971, Linear Optimal Control, Englewood Cliffs, N.J., Prentice-Hall.zbMATHGoogle Scholar
  2. ISAC: 1983, ‘Momentum Dumping using Magneto-Torques for IRS’, DOC.No. IRS-ISAC-31–83–07–05–14, Control Systems Division, ISRO Satellite Centre, Bangalore 17, India.Google Scholar
  3. Kaplan,M.H.: 1976, Modern Spacecraft Dynamics and Control, Wiley.Google Scholar
  4. Kudva,P.: 1980, ‘Analysis of pulse width pulse frequency modulator controllers for spacecraft attitude control’, INSA Symposium on servo systems held at Vikram Sarabhai Space Centre, Trivandrum, India, pp. 82–88.Google Scholar
  5. Luenberger,D.G.: 1971, ‘An introduction to observers’, IEEE Trans., Automatic Control, vol. AC-16, pp.596–602.Google Scholar

Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • P. S. Goel
    • 1
  • K. S. Chandra
    • 1
  • P. Kudva
    • 1
  1. 1.Control Systems DivisionISRO Satellite CentreBangaloreIndia

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