"rise time, overshoot, settling time" from Simulink graph?

How to determine the system "rise time,overshoot and settling time" from Simulink graph? I had try to save the 'Scope' history data to workspace in "structure with time format", Is that correct? If it is correct, what should i do in the next step in order to display the parameters?

Thankyou

[Paul Costa]

The Time Scope block, in the DSP System Toolbox, has several measurements, including Rise Time, Overshoot, Undershoot, built in. Here's a link to the reference page.

Answer 1

[Jiro Doke]

If you have Control System Toolbox, you can use stepinfo.

[Yuki Wong]

Yes, i have. But, for instance if i save the data as "a" in "structure with time format", then i type stepinfo(a), it compiled an error.

stepinfo(a)

Undefined function 'isfinite' for input

arguments of type 'struct'.

Error in stepinfo>LocalGetInfo (line 87)

if isfinite(yf)

Error in stepinfo (line 76)

[s(ct),extra(ct)] =

LocalGetInfo(s(ct),extra(ct),...

Could you help me please?

[Jiro Doke]

As you can see from the documentation, you need to pass in the signal and time vector. Something like this:

stepinfo(a.signals.values, a.time)

I suggest reading about structures: http://www.mathworks.com/help/matlab/matlab_prog/structures.html

[Yuki Wong]

Hi Jiro Doke,

The data should save in structure with time format or structure or array?

Could you give me a simple example of stepinfo with some value please?

Okay.:)

Thankyou very much.

[Jiro Doke]

I'm not sure I understand your question. You said you have a variable named "a" which is stored as a "structure with time format". Is that correct?

Then have you tried the command I typed above?

[Yuki Wong]

Jiro Doke,

Thankyou very much, i had tried to read and understand how structure works in Matlab.

Yes, your command are very helpful.

Thankyou very much.

[hind ali]

[hind ali]

how can calculate rise time,over shot,Peak Time. Settling Time

[Ur rehman Waheed]

stepinfo(y.Data, y.Time)

use above command to get rise time, settling time etc. where y is workspace variable. Basically y is step response of data.

[Elias Riyad Elyas Kasr]

Excellent, thank you

[Adesola Bankole]

Ur Rehman Waheed Thank you very much

Answer 2

[Gautam Sagar]

YOU CAN USE SCOPE BLOCK FOR THESE MEASURMENTS.GO TO TOOLS-->MEASUREMENT-->BILEVEL MEASUREMENT

[Abdulrahman Edhah]

any methods outside simulink ? just from matlap graph ?

[AZWA SHAFIQA]

Is there another way?

from the scope graph to get the values of overshoot, rise time, settling time and steady-state error.

[VIKASH kumar]

Hot to setting time and steady state error from scope results