Chapter 1, Problem 1.2E

Interpretation Introduction

Interpretation:

A schematic diagram for the given control system is to be prepared. Also, all the controlled variables, manipulated variables, and disturbance variables should be labeled.

Concept introduction:

A control system is a system that regulates or monitors the behavior or working of other devices/systems using control loops. It can be used to control single devices or large industrial processes.

Schematic representation of this control system using symbols, lines, and all the controlled, manipulated, and disturbance variables are known as control system diagrams.

Controlled variables (CVs) are the process variables that can be controlled, and its desired value is known as the set point.

Manipulated variables (MVs) are the process variables that are adjusted by the controller to keep its value close to the set point.

Disturbance variables (DVs) are the process variablesthat affect the controlled variables. But, it is important to note that they cannot be manipulated and are associated with any changes in the operating environment of the ongoing process.