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

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Student Exercises—Feed-Forward and Cascade

17 Consider again the reactor control system from Exercise 8. If there is also a measurement of the concentration of the reactor feed stream (before it enters the heat exchanger), show how it can be used in a feed-forward-control strategy (using the previously developed cascade type of strategy). Show this on both the control instrumentation diagram below and the control block diagram.

18 Design a feed-forward/cascade control strategy for the following level control problem. Draw the instrumentation directly on the figure. Draw a control block diagram, labeling all the signals on the diagram
19 Consider ...

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