i want to know how to calculate settling time , peak time , rise time

[Girish Jakkam]

hi ,
hey guys i am doing a project on two area control using fuzzy logic controller , i have done the simulation and obtained the result , i want to calculate the rise time , settling time , peak time from the scope , ive tried the

>> stepinfo(filename)

command , i am not understanding whether the displayed values are in which units .

all i want to do is to calculate the parameters from the graph i obtain from the scope !!
parameters like rise time , settling time , peak time from the scope and please let me know in which units i wil be getting them

[contessa mima]

I've tha same problem :(
i need help

[Nasser M. Abbasi]

from help:

EDU>> help stepinfo
STEPINFO Computes step response characteristics.

S = STEPINFO(Y,T,YFINAL) takes step response data (T,Y) and a
steady-state value YFINAL and returns a structure S containing
the following performance indicators:
* RiseTime: rise time
* SettlingTime: settling time
* SettlingMin: min value of Y once the response has risen
* SettlingMax: max value of Y once the response has risen
* Overshoot: percentage overshoot (relative to YFINAL)
* Undershoot: percentage undershoot
* Peak: peak absolute value of Y
* PeakTime: time at which this peak is reached.

What is the problem? units should be the same units you used
for your 't'. I assume seconds as that is the SI units.

'percentage' has no units.

peak should be in the same units you used for your 'y' data.

etc..

--Nasser

[contessa mima]

hi Nasser,
in my project , i have to :

1/ generate a pulse train with these parameters:
Pulse width (50% amplitude) 3.5 µs
Rise time (10% 90% of amplitude) 2.5 µs
Fall time (90% 10% of amplitude) <3.5 Js
level range > 80 dB


2/ analyze this generated signal and diplaying these paramters to test if they were correctly generated .


please, can you help me?
thanks.

[contessa mima]

"Nasser M. Abbasi" <n...@12000.org> wrote in message <jjn0gn$sli$1...@speranza.aioe.org>...

Nasser, do you have any idea about a gaussian pulse train?

[siteint...@gmail.com]

i want to know how to calculate settling time without "stepinfo" ???