Problem using tf to perform a transfer function.

2023 8 31
2 个回答
回答已采纳
更新时间：2023 8 31
4 次查看（30 天）

0 个投票

I was trying to mimic an m-script file for completing a transfer function from my textbook. I ran into an issue where I receive an error "Undefined functin 'tf' for input arguments of type 'double'."
My code is as follows:
numg=[6 0 1];
deng=[1 3 3 1];
sysg=tf(numg,deng);
Undefined functin 'tf' for input arguments of type 'double'.
It is important to know that the code comes from the textbook. Could I be missing a package?

请先登录，再回答此问题。

 采纳的回答

Star Strider
Star Strider 2023-8-31
Ran in:

1 个投票

Ran in:
You need to have the Control System Toolbox licensed and installed.
With that, the code works appropriately —
numg=[6 0 1];
deng=[1 3 3 1];
sysg=tf(numg,deng)
sysg = 6 s^2 + 1 --------------------- s^3 + 3 s^2 + 3 s + 1 Continuous-time transfer function.
.

更多回答（1 个）

Sam Chak
Sam Chak 2023-8-31

1 个投票

Hi @Leaysia Lampkin
If you are unable to obtain the Control System Toolbox, many useful MATLAB-compatible functions can still be executed on Octave Online. These functions include ss, tf, zpk, damp, pole, zero, rlocus, bode, nyquist, pid, feedback, minreal, dcgain, step, initial, impulse, lsim, place, lqr, lyap, etc.

类别

在 帮助中心 和 File Exchange 中查找有关 Dynamic System Models 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by