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plotting graph in simulink

Asked by Pat on 6 Nov 2012

I have to plot graphs in simulink the graphs is i the link

http://imgur.com/nVY8q

how can we plot the graph in simulink,if not possible in simulink ,please tell how to plot in matlab m file

0 Comments

Pat

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2 Answers

Answer by Azzi Abdelmalek on 12 Nov 2012
Edited by Azzi Abdelmalek on 12 Nov 2012
Accepted answer

This is a plot of a step response of second order system, you can use step command in a for loop, varying the damping coefficient sigma from 0 to 1

hold on;
sigma=.5;
for k=1:5
w0=1;
sigma=sigma+.1;
N=[w0];
D=[1 2*sigma*w0 w0^2]
step(N,D)
end
grid

8 Comments

Pat on 17 Nov 2012

ya azzi its a frequency response,it represents non stability regions during power flow

Azzi Abdelmalek on 17 Nov 2012

You can't just draw this plot, you must provide the frequency response

Pat on 17 Nov 2012

is it possible to draw non stability region B in negative region

Azzi Abdelmalek
Answer by Kaustubha Govind on 6 Nov 2012

MATLAB might be more appropriate if you want to control the line styles. See Specifying Line Style.

5 Comments

Pat on 9 Nov 2012

I know to plot different graphs with line specified ,but how to get the same shape as i have posted

Walter Roberson on 9 Nov 2012

You put it together yourself, calculating where all the lines should go.

There is no built-in plot of that style that I know of in MATLAB (but it is possible it exists in a toolbox somewhere or in Simulink somewhere and I just have not run across it yet.)

Kaustubha Govind on 12 Nov 2012

Pat: Are you asking us to identify the function that has been plotted? That might be difficult to do.

Kaustubha Govind

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