January 2021
Beginner to intermediate
392 pages
15h 38m
English
Content preview from Instrumentation and Control Systems, 3rd Edition
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Chapter 12
Nyquist Diagrams
Abstract
The principles of polar plots and Nyquist diagrams are introduced. The Nyquist stability criterion application to describing the stability of control systems is discussed.
Keywords
Nyquist diagrams; stability
12.1 Introduction
This chapter follows on from Chapter 11 and presents another method of describing the frequency response of systems and their stability. The method uses Nyquist diagrams; in these diagrams the gain and the phase of the open-loop transfer function are plotted as polar graphs for various values of frequency. The transfer function of a basic closed-loop ...
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