How do I write code in Matlab for sampling sine wave signal from Simulink...

How do I write code in Matlab for sampling sine wave signal from Simulink...

Answer 1

[Hari]

Hi Mladen,

I understand that you want to write MATLAB code to sample a sine wave signal generated in a Simulink model.

I assume you have a Simulink model with a sine wave block and you want to capture or sample this signal using MATLAB.

In order to sample a sine wave signal from Simulink using MATLAB, you can follow the below steps:

Create a Simulink Model:

Open Simulink and create a new model with a “Sine Wave” block and a “To Workspace” block to output the signal.

open_system('new_model'); % Open a new Simulink model

Configure the Sine Wave Block:

Set the parameters of the “Sine Wave” block such as amplitude, frequency, and sample time according to your requirements.

set_param('new_model/Sine Wave', 'Amplitude', '1', 'Frequency', '1', 'SampleTime', '0.01');

Connect the Blocks:

Connect the “Sine Wave” block to the “To Workspace” block to store the signal in the MATLAB workspace.

add_line('new_model', 'Sine Wave/1', 'To Workspace/1');
set_param('new_model/To Workspace', 'VariableName', 'sineData');

Simulate the Model:

Run the simulation for a specified duration to capture the sine wave data.

sim('new_model', 'StopTime', '10'); % Simulate for 10 seconds

Analyze the Sampled Data:

Access and plot the sampled sine wave data stored in the workspace.

plot(sineData.time, sineData.signals.values);
xlabel('Time (s)');
ylabel('Amplitude');
title('Sampled Sine Wave');

Refer to the documentation of “sim” function to know more about its usage:

• https://www.mathworks.com/help/simulink/slref/sim.html

Hope this helps!