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Process Control: Modeling, Design, and Simulation by B. Wayne Bequette

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Additional Exercises

1:Generate responses to step changes of ±0.01 kmol/minute in the vapor boil-up rate (V) at t = 10 minutes. Compare and contrast these responses with those of the reflux changes shown in Figure M13-3. Are these changes consistent with the transfer function matrix?
2:Consider the SISO controllers. The reader should verify through simulation that the independent controllers with IMC filter factors of 25 minutes lead to closed-loop time constants of roughly 25 minutes.
  1. First, close the xD-L loop and make a setpoint change of 0.005 mole fraction.

  2. Next, close the xB-V loop (with xD-L open) and make a setpoint change of -0.005 mole fraction. In each case, show the change of both compositions.

3:Consider the case where both SISO controllers ...

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