MATLAB: Use Simulink time variable in a Matlab Function

matlab functionsimulinktime

Hello everybody,

I want to implement a Matlab function into my Simulink Model, where I upconvert a signal to 24 GHz. I therefore want to implement the function y = real(u*exp(i*2*pi*24e9*t) as a Matlab function, where u is a complex time signal which is created in Simulink and t stands for the time in Simulink. I now somehow need to get the variable t of my Simulink project into my Matlab function in order to calculate the given function, but I dont know how to implement the variable t.

Thanks in advance for helping.

Best Answer

You can directly create MATLAB function inside Simulink using MATLAB function block: https://www.mathworks.com/help/simulink/ug/creating-an-example-model-that-uses-a-matlab-function-block.html. To feed the simulation time, use the clock block: https://www.mathworks.com/help/simulink/slref/clock.html.

Related Solutions

MATLAB: Simulink: Excite System for couple seconds but longer simulation time

There can be several ways, but the easiest might be to use a MATLAB function block: https://www.mathworks.com/help/simulink/ug/creating-an-example-model-that-uses-a-matlab-function-block.html. You can input the clock block: https://www.mathworks.com/help/simulink/slref/clock.html to the MATLAB function block and write the following code inside it

function y = fcn(t)
    if t < 10
        y = sin(t);
    else
        y = 0;
    end
end

MATLAB: Simulink change vector data over time

See from workspace block: https://www.mathworks.com/help/simulink/slref/fromworkspace.html.

You can also use MATLAB function block and write the code to generate the signals: https://www.mathworks.com/help/simulink/slref/matlabfunction.html. To get information about time inside the function block, use clock https://www.mathworks.com/help/simulink/slref/clock.html.

Related Question