Design of Optimal Control Systems with Stable Feedback

@article{Ganesh1986DesignOO,
  title={Design of Optimal Control Systems with Stable Feedback},
  author={C. Ganesh and J. B. Pearson},
  journal={1986 American Control Conference},
  year={1986},
  pages={1969-1973}
}
The problem of stabilizing a single-input single-output system using stable feedback is considered. The performance index that is minimized is the weighted sensitivity of the closed-loop system to external disturbances. However, the resulting feedback associated with the minimum value of the optimality criterion turns out to be irrational. A design algorithm has been developed to find an approximation whose deviation from a sub-optimal system lies within a pre-specified error bound. 
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