Chapter 14. Discrete-Time Models

Objectives of the Chapter

  • Introduce discrete-time models used in computer-controlled systems.

  • Introduce the z-transform representation.

  • Introduce FIR (finite impulse response) and FSR (finite step response) models.

  • Introduce discrete-time versions of the PID controller.

Prerequisite Reading

Chapter 2, “Continuous-Time Models”

We shift our focus from continuous-time models and controllers to discrete-time models and controllers. Application of computer control systems necessitates this representation. The computer is a discrete-time device that can only measure (i.e., collect data from sensors) and take control action at discrete points in time. A typical DCS (distributed computer control system) employed in the process ...

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