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Math Help - matlab help

  1. #1
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    matlab help

    Hello
    Well I have a question to ask..
    suppose I have the matlab code above:

    z=-4;p=[-2+5j -2-5j];k=6.5;
    [num den]=zp2tf(z,p,k);
    t=0:0.01:4;
    [y,x]=step(num,den,t);
    plot(t,y); grid;

    how can i find the rise time,overshoot?
    are there formulas?
    is there a way to find them in matlab?
    thank you
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by qwerty321 View Post
    Hello
    Well I have a question to ask..
    suppose I have the matlab code above:

    z=-4;p=[-2+5j -2-5j];k=6.5;
    [num den]=zp2tf(z,p,k);
    t=0:0.01:4;
    [y,x]=step(num,den,t);
    plot(t,y); grid;

    how can i find the rise time,overshoot?
    are there formulas?
    is there a way to find them in matlab?
    thank you
    You calculate them from y-t plot or from the y-t data.

    CB
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  3. #3
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    i do not know the formulas for the rise time and overshoot:S
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by qwerty321 View Post
    i do not know the formulas for the rise time and overshoot:S
    This page has links to their definitions

    CB
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