How to implement real-time input using a MATLAB Function block

Hello, I am currently researching the control of a Stewart platform simulation. I would like to input the necessary values by dividing them by the step size and using a MATLAB function block to deliver the input values in real-time. Is it possible to receive the calculated input values from a script file into the function block and deliver these values in real-time for each step according to the simulation time?

I want to input the values calculated in the script file into the MATLAB function block as data, with time and step settings, and have the block calculate the 8 prism joint displacements. These displacements should be divided into steps over the simulation time and delivered in real-time.

Answer 1

[Jaimin]

Hi @석준

In order to obtain the calculated input values from a script file within the function block and provide these values in real-time for each simulation step, I have a workaround that you might consider trying.

Please follow these steps:

1. Add a “MATLAB Function” block to the model.
2. Use a “Bus” block to combine all outputs from the 'parse motion' block.
3. Connect the “Bus” created in Step 2 to the input port of the “MATLAB Function” block from Step 1.
4. Link the output of the “MATLAB Function” block from Step 1 to the input port of the “parse motion” block.
5. Set the priority of the “MATLAB Function” block from Step 1 higher than that of the “parse motion” block.
6. Incorporate domain-specific logic into the newly created “MATLAB Function” block and assign initial data to the relevant properties.

For more information on “MATLAB Function” and “Bus” Block you can refer following documentations:

MATLAB Function: https://www.mathworks.com/help/simulink/what-is-a-matlab-function-block.html

Bus: https://www.mathworks.com/help/simulink/slref/simulink-buses.html

I hope this will be helpful.