Enhanced disturbance rejection for open-loop unstable process with time delay.

  title={Enhanced disturbance rejection for open-loop unstable process with time delay.},
  author={M. Shamsuzzoha and Moonyong Lee},
  journal={ISA transactions},
  volume={48 2},
The present study suggests a disturbance estimator design method for application to a recently published, two-degree-of-freedom, control scheme for open-loop, unstable processes with time delay. A simple PID controller cascaded with a lead-lag filter replaces the high-order disturbance estimator for enhanced performance. A new analytical method on the basis of the IMC design principle, featuring only one user-defined tuning parameter, is developed for the design of the disturbance estimator… CONTINUE READING
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