Study-Unit Description

Study-Unit Description


TITLE Automatic Control Systems 3

LEVEL 03 - Years 2, 3, 4 in Modular Undergraduate Course


DEPARTMENT Systems and Control Engineering

DESCRIPTION This study-unit introduces techniques for the analysis and design of automatic control systems. Both continuous-time and discrete-time scenarios are considered. The design of analogue lag, lead and lag-lead compensators, as well as the Proportional Integral Derivative (PID) controller operating in continuous-time, is presented from a root-locus approach.

This is followed by an analysis of the characteristics of computer controlled systems operating in discrete-time, based upon the z-Transform. Techniques for the design of PID and emulation-based digital controllers (Bilinear Transformation) are also presented.

Study-unit Aims:

The aims of the study-unit are to:
- present the use of passive lag, lead and lag-lead compensators for control of systems in continuous-time,
- apply the root-locus approach for the design of lag, lead and lag-lead compensators,
- present the use of Proportional Integral Derivative (PID) control,
- apply the Ziegler-Nichols method and root-locus based techniques for the design of PID control,
- introduce the concept of computer controlled systems,
- illustrate the analysis of computer controlled systems in the discrete-time domain and the z-domain,
- present the digital PID control algorithm and its design,
- present the use of the Bilinear Transform for the design of emulation-based digital control.

Learning Outcomes:

1. Knowledge & Understanding:

By the end of the study-unit the student will be able to:
- identify the type of controller which is required to satisfy a given closed-loop system specification,
- describe the effect of standard types of controller on the performance of a given closed-loop system,
- distinguish between the use of continuous-time and discrete-time analysis when presented with a control-design problem,
- analyze the behaviour of a closed-loop system when presented with the dynamics of the individual subsystems within the loop.

2. Skills:

By the end of the study-unit the student will be able to:
- apply the root-locus approach to design an appropriate controller when presented with a performance specification for a given closed-loop control system operating in continuous-time,
- apply the Ziegler-Nichols approach to design a PID controller for a given closed-loop control system operating in either continuous-time or discrete-time,
- apply the Bilinear Transform to design an appropriate controller when presented with a performance specification for a given closed-loop control system operating in discrete-time.

Main Text/s and any supplementary readings:
(availability at the Library or otherwise is indicated against each entry)

(1) Franklin G.F., Powell J.D. & Workman M., 2006. Digital Control of Dynamic Systems (3rd Ed), Ellis-Kagle Press. ISBN 0-97-912260-0 (available)

(2) Kuo B.C., 1995. Automatic Control Systems, Prentice Hall. ISBN 0-13-304759-8 (available)
Ogata K., 1990. Modern Control Engineering, Prentice Hall. ISBN 0-13-589128-0 (available)

ADDITIONAL NOTES Pre-requisite Study-unit: SCE2213

Co-requisite Study-unit: SCE3101

STUDY-UNIT TYPE Lecture, Practicum & Tutorial

Assessment Component/s Assessment Due Resit Availability Weighting
Report SEM1 No 15%
Online Examination (2 Hours) SEM1 Yes 85%

LECTURER/S Simon G. Fabri

The University makes every effort to ensure that the published Courses Plans, Programmes of Study and Study-Unit information are complete and up-to-date at the time of publication. The University reserves the right to make changes in case errors are detected after publication.
The availability of optional units may be subject to timetabling constraints.
Units not attracting a sufficient number of registrations may be withdrawn without notice.
It should be noted that all the information in the description above applies to study-units available during the academic year 2020/1. It may be subject to change in subsequent years.