PROCESS DYNAMIC+CONTROL-EBOOK>I<
PROCESS DYNAMIC+CONTROL-EBOOK>I<
4th Edition
ISBN: 2819480255712
Author: Seborg
Publisher: INTER WILE
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Chapter 1, Problem 1.3E
Interpretation Introduction

Interpretation:

Two feedback control systems that are used in home heating systems apart from the thermostatically operating system, are to be defined along with their descriptive working.

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. There are two types of control systemsthat can be used to control the processes. These are feedback control system and feedforward control system.

Feedback control systems consider the output of the system and then compares it with the desired value to adjust the measured value to provide accurate results whereas in feedforward control system, disturbances are taken into account beforehand and they are rectified to control it from deviating from the desired set point.

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9.4. A PID temperature controller is at steady state with an output pressure of 9 psig. The set point and process temperature are initially the same. At time = 0, the set point is increased at the rate of 0.5°F/min. The motion of the set point is in the direction of lower temperatures. If the current settings are PART 3 LINEAR CLOSED-LOOP SYSTEMS Ke = 2 psig/°F Ti = 1.25 min TD = 0.4 min plot the output pressure versus time.
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