Index exceeds the number of array elements (1) using transfer function

3 次查看（过去 30 天）
Lucy Beksinska
Lucy Beksinska 2020-12-10
评论： Lucy Beksinska 2020-12-10
I don't understand what is wrong, it's frustrating.
% set up motor with initial conditions and properties
motor.timeConstant = 0.65; % [min]
motor.gain = 0.5; % [rpm/V]
% transfer function for the motor
s = tf('s');
TFmotor_OL = motor.gain / (motor.timeConstant*s +1);
ERROR message:
>> Tutorial3controllingplant
Index exceeds the number of array elements (1).
Error in Tutorial3controllingplant (line 6)
s = tf('s');

请先登录，再回答此问题。

采纳的回答

Amir RF
Amir RF 2020-12-10
Dear Lucy,
I run your code and I did not get any errors. Your error may be in your earlier code line (where you define s).
Best,
  3 个评论
显示 1更早的评论
Amir RF
Amir RF 2020-12-10
You can replace
s = tf('s');
TFmotor_OL = motor.gain / (motor.timeConstant*s +1);
with
TFmotor_OL = tf(motor.gain, [motor.timeConstant 1]);
This gives you the same result.
Best,
Lucy Beksinska
Lucy Beksinska 2020-12-10
Thank you for your help. I have also restarted the MATLAB app and the error has gone!
regards, lucy

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Motor Drives 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