week 10 part 1 pe 6282 block diagrams
DESCRIPTION
ModelingTRANSCRIPT
Professor Charlton S. InaoPE-6282 Mechatronics System Design
Defence Engineering College Bishoftu, Ethiopia
Week 10 Data Presentation SystemPart 1
Instructional ObjectivesTo understand and manipulate the following:1)Block diagrams operations to represent
control system2) Canonical Form of feedback control system3) Block diagram Transformation4) Block diagram Reduction5) Examples6) Homework and Assignment
04/13/23 2
Concept of Transfer FunctionBlock Diagram: Pictorial representation of functions performed by each
component of a system and that of flow of signals.
04/13/23 3
Transfer Function : Generalized Statement
04/13/23 4
Concept of Transfer Function
04/13/23 5
Terminology of Transfer Function
04/13/23 6
04/13/23 7
Block diagram transformationsSource: Owonbulu
Block Diagram Algebra and Transfer Functions (Source:
Schaum’s Outline- more complete)
04/13/23 10
04/13/23 11
04/13/23 Prof. Charlton S. Inao 12
Summary of Block Diagram reduction
04/13/23 13
Summary of Block Diagram Reduction
04/13/23 14
Block Diagram Simplification
04/13/23 15
Block Diagram Simplification
04/13/23 16
Block Diagram Simplification
04/13/23 17
Block Diagram Simplification
04/13/23 18
C(s)+ G(s)H(s)C(s)=G(s)R(s)
Block Diagram Simplification
04/13/23 19
Example 1
04/13/23 20
Example 2
04/13/23 21
Example 3
04/13/23 22
Example 4
04/13/23 23
Example 5
04/13/23 24
04/13/23 Prof. Charlton S. Inao 25
Simplify the following block diagrams
Solution
Breaker: Sample Problems from Control Engineering by W. Bolton
04/13/23 Prof. Charlton S. Inao 26
Problem: What is the over all transfer
function of the following systems.
Answers:
Example 6
04/13/23 27
Continuation……..
Example 6
04/13/23 28
Example 6
04/13/23 29
Example 7 : Multiple Loop Feedback Control System
The denominator equation would be:
Step 1
Step 24G
1
Step 3
Step 4 multiply cascaded blocks
Step 5 Eliminating a feedback loop
Step 5 Eliminating a feed back loop
Rule
)(1
1
4
2
143
143
G
H
HGG
HGG
432
432
GGG
GGG
-1
)(
1*
1
1
4
2
143
143
G
H
HGG
HGG
432
432
GGG
GGG
-1
)(
1*
1
)
1
(11
4
2
143143
143
143
G
H
HGGHGG
HGGHGG
432
432
GGG
GGG
-
)(
1*
)
1
(11
4
2
143
143
143
G
H
HGG
HGGHGG
432
432
GGG
GGG
Step 6
232
32
HGG
GG1
1*
1
)(*
1
11
143
2
143
143
143
HGG
then
H
HGG
HGGHGG
432
4
4
432
GGG
GG
GGG
Multiply cascade blocks
Step 7
Eliminating a feedback loop
Rule:
From
3232143
4321
232143
4321
)1(1
1
HHGGHGG
GGGGHGGHGG
GGGG
Step 8
3232143
4321
232143
232143
232143
4321
)1(
1
11
HHGGHGG
GGGG
HGGHGG
HGGHGGHGGHGG
GGGG
34321232143
4321
1 HGGGGHGGHGG
GGGG
Rs Ys
Over all transfer function
04/13/23 Prof. Charlton S. Inao 40
Example 8
04/13/23 Prof. Charlton S. Inao 41
parallel
04/13/23 Prof. Charlton S. Inao 42
Example 9
04/13/23 43
04/13/23 44
04/13/23 45
Example 10
04/13/23 46
04/13/23 47
Example 10 Final Answer
04/13/23 48
Assignment /Homework
04/13/23 Prof. Charlton S. Inao 49
Reduce/Simplify the following block diagram into its overall transfer function, isolating block H1
Solution
Problem No. 1
04/13/23 Prof. Charlton S. Inao 50
Problem No. 2
Solution
Simplify the block diagram by isolating feedback transfer function H2
04/13/23 Prof. Charlton S. Inao 51
Problem No.3
Solution
Problem No.4 Reduce the block diagram of the Fig. below to canonical form, isolating block K in the forward loop.
04/13/23 Prof. Charlton S. Inao 52
Solution
Problem No. 5. Reduce the block diagram below into open loop form.
04/13/23 Prof. Charlton S. Inao 53
Solution