'step()' and 'tf()' not working on MATLAB 2022?

Hi there, I'm trying despretaly to use the 'tf()' command to create an transfer function. Later on I want to 'figure' the step response. I searched the help areas and watched tutorials about the same task than mine but it wont work for me.

My syntax is:

%% Aufgabe 1.2

m = 100; %Kilogramm (Masse)

d = 1; %Ns/m (Dämpfung)

c = 1e4; %N/m (Federsteifigkeit)

%Übertragungfunktion

Z = 1; %(Zählerpolynom)

N = [m, d, c]; %Nennerpolynom

G = tf(Z,N); %Übertragungsfunktion

%Statische Verstärkung

K = 1/c;

%Sprungantwort

figure(1)

step(G)

The errors are:

'tf' requires one of the following:

Control System Toolbox

DSP System Toolbox

Model Predictive Control Toolbox

RF Toolbox

Signal Processing Toolbox

Error in Aufgabe1 (line 26)

G = tf('1','N'); %Übertragungsfunktion

Check for incorrect argument data type or missing argument in

call to function 'step'.

Error in Aufgabe1 (line 33)

step(G)

Did they changed the commands in the 2022 version of Matlab?

Thanks for the help!

Answer 1

[Sam Chak]

Hi @Tom Bienas

The step() and tf() functions require the Control System Toolbox.

You can enter this to determine if the License exists or not:

status = license('test', 'Control_Toolbox')

For more info, please refer here or contact technical support.

https://www.mathworks.com/help/matlab/ref/license.html