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 ...