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Model Identification and Attitude Control Methodology for the Flexible Body of a Satellite

  • Lho, Young-Hwan
  • Published : 2010.09.15

Abstract

The controller of a model reference adaptive control monitors the plant's inputs and outputs to acknowledge its characteristics. It then adapts itself to the characteristics it encounters instead of behaving in a fixed manner. An important part of every adaptive scheme is the adaptive law for estimating the unknown parameters on line. A more precise model is required to improve performance and to stabilize a given dynamic system, such as a satellite in which performance varies over time and the coefficients change due to disturbances, etc. After model identification, the robust controller ($H{\infty}$) is designed to stabilize the rigid body and flexible body of a satellite, which can be perturbed due to disturbance. The result obtained by the $H{\infty}$ controller is compared with that of the proportional and integration controller which is commonly used for stabilizing a satellite.

Keywords

Satellite attitude control;Adaptive control;Model identification;Proportional and integration controller;Robust controller ($H{\infty}$)

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