| anders mynster 2007-02-28, 7:14 pm |
| Well you are told to find the overshoot, settling time etc. These all
correspond to the time domain, so you have to do an inverse laplace
transform and from the impulse response find the things you are asked
to find. I looks too much as a school assigment so i wont tell you
the whole answer, but hope it helps.
Anders
Chris J wrote:
>
>
> Hello,
>
> I'm stuck on a problem that I'm trying to figure out.
>
> First I'm given the transfer function, G(s)= b / s^2 + as + b
>
> The problem breaks down into three parts:
>
> Part A. I have to evaluate percent overshoot, settling time, peak
> time, and rise time for the following values: a=4, b=25. Plot the
> poles also.
>
> Part B. Calculate the values of a and b so that the imaginary part
> of
> the poles reamins the same, but the real part is increased 2 times
> over that of Part A, and repeat Part A.
>
> Part C. Calculate the values of a and b so that the imaginary part
> of
> the poles remains the same, but the real part is decreased 1/2 time
> over that of Part A, and repeat Part A.
>
> Now I kind of have an idea of solving Part A. I have this written
> in
> Matlab but Matlab keeps giving me errors saying certain values are
> either undefined or some other error. This is what I have written
> in
> Matlab at the moment:
>
>
> at this point I try to enter the formula for omega but I keep
> getting
> an error saying "Index exceeds matrix dimensions," now I'm pretty
> much lost and am hoping someone could help me on this one?
|