error step input and velocity input

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ali
ali 2011-11-1
HOW can Find the error of following system to step input and velocity input.?
g=tf([2000],[1 15 50 2000])

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回答（1 个）

Fangjun Jiang
Fangjun Jiang 2011-11-1
The function to use is stepinfo() like below. But your system is not stable. What "error" do you mean? Steady-state error?
sys=tf(1, [1 4 10]);
[y,t]=step(sys);
plot(t,y);grid on;
stepinfo(y,t,1/10)

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