Error when inputting step function

2021 9 28
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更新时间：2021 9 28
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m2 = 350;
m1 = 10;
Ks = 10000;
Kw = 500000;
b = 1000;
Num = Kw* [b Ks];
Den = m1*m2*[1 (b/m1 + b/m2) (Ks/m1 + Ks/m2 + Kw/m1) b*Kw/ (m1*m2) (Ks*Kw) / (m1*m2)];
step(Num,Den)
Error message:
>> help
Check for incorrect argument data type or missing argument in call to function 'step'.
Error in help (line 8)
step(Num,Den)

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 采纳的回答

Star Strider
Star Strider 2021-9-28
Ran in:

1 个投票

Ran in:
The code is missing a setp (pun intended) —
m2 = 350;
m1 = 10;
Ks = 10000;
Kw = 500000;
b = 1000;
Num = Kw* [b Ks];
Den = m1*m2*[1 (b/m1 + b/m2) (Ks/m1 + Ks/m2 + Kw/m1) b*Kw/ (m1*m2) (Ks*Kw) / (m1*m2)];
sys = tf(Num,Den) % Create A 'system' Object With The 'tf' Function (In This Instance)
sys = 5e08 s + 5e09 ---------------------------------------------------- 3500 s^4 + 360000 s^3 + 1.786e08 s^2 + 5e08 s + 5e09 Continuous-time transfer function.
figure
stepplot(sys)
.

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