about simulink

1. 1
Basic Operation of Simulink

2. Run Simulation
Step Response
2
1. Double-click
[Scope] of Block
diagram and click
[Simulation] [Run]
of Scope view
Scope
Run
2. Scope View
[File][Print Figure]
Print to Figure
3. The value of coordinates
Figure View
Left Click
[Data Tips ]
And left-click on the point you
want to know

3. 3
Input constant number
[Modeling] [Model Explore] [Callbacks]
[IniFcn] Put constant to parameter
name
Apply

4. 4
Designate input / output of Bode diagram.
Right click on the signal line and select
[Linear Analysis Point]
Select and input [Open-loop Input] and
output [Open-loop Output].
Perform the same operation to cancel
Bode diagram input / output
Output of Bode Diagram
Right click
on the line
Right click
on the line
INT1

5. 5
Instruction to output Bode diagram

6. 6
Display scale lines and system characteristics
A tick line is displayed by right-
clicking on the screen and selecting
[Grid]
Display system characteristics with
[Characteristic] [All Stability
Margins]
Left-click the marker to display the characteristic value.
Also, Left-click on the curve to display frequency and phase values.
Left-click on the screen other than the curve to erase the characteristic value.

7. 7
Relation between
Open Loop Transfer
Function & Step
Response
Amax

8. Step Response of Second-order Lag
ωn t
y(t)
/K
The following relations can be found in the left figure.
The output amplitude overshoots when ζ < 1 .
The smaller the ζ , the bigger the overshooting.
→ the smaller the ζ , the lesser the stability.
TP ≒ 3.5/ωn <1.0 → the larger the ωn, the faster the
response
8
Transient Characteristic
Steady-state
Characteristic
Kωn
2
s2+2ζωns+ωn
2