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Techniques of Model-Based Control by Babu Joseph, Coleman Brosilow

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Chapter 9. Feedforward Control

Objectives of the Chapter

  • Describe how to use feedforward control to compensate for measured disturbances.

  • Show how to use the material in Chapters 3, 4, 6, and 7 to design and tune combined feedforward/feedback control systems.

Prerequisite Reading

Chapter 3, “One-Degree of Freedom Internal Model Control”

Chapter 4, “Two-Degree of Freedom Internal Model Control”

Chapter 6, “PI and PID Controller Parameters from IMC Designs”

Chapter 7, “Tuning and Synthesis of 1DF IMC Controllers for Uncertain Processes”

Introduction

Combined feedforward plus feedback control can significantly improve performance over simple feedback control whenever there is a major disturbance that can be measured before it affects the process output. In ...

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