060-Converting Feedback Systems from Analog to Digital Control

By: Raymond L. Barrett, Jr., PhD, PE

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Course Objective

This continuing education course is written specifically for professional engineers with the objective of relating to and enhancing the practice of engineering.

Course Description

060-Converting Feedback Systems from Analog to Digital Control

This course covers a methodology for developing a digital controller by converting an existing compensated analog controller to a digital model. An analog system is developed, along with a Pole-Zero compensator for use as a typical example. The purpose and effects of the compensator are discussed. The effects of discrete-time sampling of the signals is discussed, along with delay and excess phase effects in accordance with the Zero-Order Hold (ZOH) behavior introduced by the analog-to-digital converter used in the loop.

A system block diagram approach is introduced with integrators in both analog and digital forms. The original analog controller, as well as the compensator model, is produced using a bilinear-transform version of a digital integrator. The performance effects of the sampling are discussed, along with the need for a high enough sampling rate to avoid aliasing and excess phase effects on stability. Implementation alternatives for the digital controller are discussed as well as practical considerations of the effects of digital word-widths on the computation requirements.

Questions about this course? Email the Author: raybarrett@comcast.net

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(5) 3 Reviews

060-Converting Feedback Systems from Analog to Digital Control

Roman Korchak

01/07/2019

A very good course with some challenging questions. I would recommend this course to other electrical engineers.

1 of 1 customers found this helpful.

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060-Converting Feedback Systems from Analog to Digital Control

Majdood Siddiqui

07/09/2017

5/5

1 of 1 customers found this helpful.

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11/13/2013

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Course Code: 100206-02

Course PDH Hours: 4

Engineering Course Approvals

This course is accepted for engineering continuing education credit in all US states, territories, the District of Columbia, and Canadian provinces.
Ohio rules allow only 6-hours of unsupervised online courses such as this course per license renewal period
Kansas rules allow only 5-hours of self-study courses such as this course per license renewal period

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