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

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Chapter 10. Cascade and Feed-Forward Control

The objective of this chapter is to develop feed-forward- and cascade-control system design procedures. The emphasis of both of these strategies is on rejecting disturbances. After studying this chapter, the reader should be able to do the following:

  • Given an instrumentation diagram for a cascade-control strategy, develop the corresponding control block diagram using either a series or parallel structure

  • Tune cascade controllers; tune the secondary loop first; then tune the primary controller with the secondary loop closed

  • Given an instrumentation diagram for feed-forward/feedback control, develop the corresponding control block diagram

  • Develop the closed-loop transfer functions for feed-forward/feedback ...

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