Manual for

ENGR 329

CONTROL SYSTEMS LABORATORY

College of Engineering and Computer Science

University of Tennessee at Chattanooga

Spring, 1996

Dr. Jim Henry

Grateful acknowledgment is given to the following for contributions in support of this laboratory:

Analog Devices Company

Apple Computer Company

MicroMotion Instruments

National Instruments Corporation

Plant Engineering Consultants

  Contents  

1: Schedule 2

2: Grading 4

3: Objectives & Guidelines 5

4: Project Information 7

5: Weekly Assignments 14

Appendices 64


1: Schedule

Part I -- System Identification

Week 1 Introduction, steady-state measurements, statistics,

10 Jan data acquisition software, cleaning up

Week 2 Steady-state operating curves, graphing & word

17 Jan processing software

Week 3 Week 3 Report

24 Jan Step response measurements

Week 4 Week 4 Report

31 Jan Modelling software

Week 5 Modelling -- Approximate FOPDT

7 Feb

Week 6 Week 6 Report

14 Feb Frequency response measurements

Week 7 Modelling frequency response

21 Feb

Week 8 Week 8 Report

28 Feb Plant visit

Part II -- Control System Design

Week 9 Root locus plotting

6 Mar

Week 10 Week 10 Report

20 Mar Proportional control theory & modelling

Week 11 Proportional control experiment

27 Mar

Week 12 Week 12 Report

3 Apr PI control theory & modelling

Week 13 PI control experiment

10 Apr

Week 14 Week 14 Report

17 Apr


If I treat you as you are, I will make you worse.



If I treat you as though you are what you are capable of becoming, I help you become that.



--Goethe


Schedule of Presentations & Reports

Date
Pre-Lab
Present-

ation
Report
110-Jan
217-Jan
Temperature & Position

324-Jan
Speed & Pressure

All members
431-Jan
All Groups
Temperature, Position & Level

third member in each
57-Feb
Flow & Level

614-Feb
Temperature & Pressure
All Groups
Pressure, Speed & Flow

first member in each
721-Feb
Speed & Level

828-Feb
All Groups
Temperature, Position & Level

first member in each
96-Mar
13-Mar
1020-Mar
Flow & Position
All Groups
Pressure, Speed & Flow

third member in each
1127-Mar
Temperature & Level

123-Apr
Flow & Speed
All Groups
Temperature, Position & Level

second member in each

Pressure, Speed & Flow

fourth member in each
1310-Apr
Pressure & Position

1417-Apr
All Groups
Pressure, Speed & Flow

second member in each

Temperature, Position & Level

fourth member in each


Pre-Lab presentation is to be given by 2 students; one from each of the groups indicated in the "Pre-Lab" column.

Presentations of results will be given on the days indicated in the "Presentation" column.

Reports are scheduled as indicated in the "Report" column. Within your group, you submit reports in order of the group assignment list handed out in lab. For example, "third member" in week 4 means that the person listed third in the group assignment list submits the Week 4 Report.

2: Grading

The grading in ENGR 329 will reflect what is observed of your understanding of control systems operation. Evidence of this understanding can be observed in your

ï ability to apply the principles to a physical system (performance in the laboratory and quality of results)

ï ability to construct models to simulate the physical system (performance in modelling and quality of results)

ï ability to interpret, describe and explain experimental and modelling work (reports and presentations)

The weights given will be

35 points Physical laboratory

(attendance, performance)

20 points Modelling laboratory

(attendance, performance)

20 points Reports

25 points Presentations

Physical and modelling lab will be graded on this scale

points for Leadership Contributions

Participation Creativity

Cooperation Teamwork

0 points Absent

The semester grade will be determined by your point total

90-up A

80-89 B

70-79 C

65-69 D

0-64 F

The following must be completed to receive a passing grade in the lab:

2 reports, 3 presentations, 5 out of the 6 physical laboratories, 3 out of 4 of the modelling laboratories and a submitted report notebook.

All work done will receive credit if it is submitted before the last scheduled lab meeting of the semester.

3: Objectives & Guidelines

Objectives

The main objectives of the laboratory experiences are to help you sharpen your skill in observing what happens to an engineering system and to accurately and completely describe what you observe.

Here is a diagram of the experiments and modelling to be done during the semester. Generally, in the first half of the semester, you will be conducting experiments and making observations on your system so that you can build a good linear FOPDT model of the system. A "good" model is one in which the results of the model calculations are in agreement with the experimentally observed results.
Observations on Laboratory System Modelling to Approximate the System
Week 1-2

Observations at steady state

System

Identification
Week 3

Observations of dynamic response to a step input


Week 4-5

Build a model to describe the system

Week 6

Observations of dynamic response to a sine input


Week 7-8

Improve a model to describe the system


Control

System
Week 10

Verify & fine tune the design of the controller


Week 9

Use a model to design a proportional controller

Design
Week 12-14

Verify & fine tune the design of the controller


Week 11

Use a model to design a proportional-integral controller


In the second half of the semester, you will use this linear FOPDT model that you have built to design a control system to give a response of your system under certain operating scenarios. Then you will conduct experiments to see if your designs were valid and useful.

Guidelines on Safety, Cleanliness, Conservation, Citizenship

We have had over two years of experience with no lost-time injuries in this lab. Let's all do our part to make this year another one. In the event that someone is injured in the lab and is bleeding, before you help them, put on latex gloves that are available in the lab. Have someone show you where they are.

These labs are not routinely cleaned by the custodial workers. We have to keep them clean ourselves. Always leave the lab cleaner when you leave than when you arrived. If the trash cans are full, set them in the hall to be emptied. If an empty trash can is outside the door, bring it into the lab.

Around the computer workstations, do not have food or drink. If you have food or drink elsewhere, please clean up your stuff. Recycle aluminum cans and Styrofoam containers. Rinse them first if there's grunge in them.

Conserve resources and money by printing only what is necessary for effective learning. If you print something that you don't need, place the paper in the "one-side-good" recycle stack to be reused. (Put the good side up.) If you are printing a draft, please use paper from the "one-side-good" stack.

Printers are not instantaneous. This lab has one printer and many users. During heavy use times, plan twice and print once. This will reduce frustrations. In the event you don't get a printout instantly, re-read this paragraph.

If you have any suggestions to improve this lab, pass it on to an instructor or assistant.