how to calculate Integral Square error(ISE) of a system step response from matlab

how to calculate Integral Square error(ISE) of a system step response from matlab

Answer 1

[Dham Alshammry]

hello, though this is an old post, but i just knew how to do it.

you can store the response in a variable, say R. if the input signal is a unit step it is a 1 allover the time. you can calculate error by subtracting 1 from R, that yields new array called error. you can square error, then use trapz to integrate

Answer 2

[Jatin Patel]

Can you give an example?

Thank You!

Answer 3

[ASWANT KUMAR SHARMA]

err = 1-y;

deltat = 0.1;

ise = trapz(deltat,err.^2);

[VED VIKAS]

How you have choosen deltat = 0.1??

[Nagendra Singh]

Not working it.....

[NITHIN BALARAMEGOWDA]

data1 = somevalues(:,2);

data2 = somevalues(:,3);

t = 0:0.01:15 %have to be same as simulation step time and final time

error = (somevalues(:,2)-somevalues(:,3)).^2;

ISE = trapz(t,error)

Hope it helps.