I get these results. How can I make the small decimal zeros?

Question

PETROS CHARMPATSIS 2023-11-2

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2042166-i-get-these-results-how-can-i-make-the-small-decimal-zeros

回答： Walter Roberson 2023-11-2

0.004 s^4 + 7.426e-18 s^3 + 3.2 s^2 + 5.7077e-15 s

--------------------------------------------------

s^4 + 110 s^3 + 1020 s^2 + 8000 s + 16000

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Answer 1

Walter Roberson 2023-11-2

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2042166-i-get-these-results-how-can-i-make-the-small-decimal-zeros#answer_1345746

在 MATLAB Online 中打开

tol = 1e-7;
s = tf('s');
G = (0.004 * s^4 + 7.426e-18 * s^3 + 3.2 * s^2 + 5.7077e-15 * s) / ( s^4 + 110 * s^3 + 1020 * s^2 + 8000 * s + 16000)
G =
 
  0.004 s^4 + 7.426e-18 s^3 + 3.2 s^2 + 5.708e-15 s
  -------------------------------------------------
      s^4 + 110 s^3 + 1020 s^2 + 8000 s + 16000
 
Continuous-time transfer function.
Num = G.Numer; Den = G.Denom;
Adjust = @(V) V .* (abs(V) > tol);
Num = cellfun(Adjust, Num, 'uniform', 0);
Den = cellfun(Adjust, Den, 'uniform', 0);
G = tf(Num, Den)
G =
 
             0.004 s^4 + 3.2 s^2
  -----------------------------------------
  s^4 + 110 s^3 + 1020 s^2 + 8000 s + 16000
 
Continuous-time transfer function.