simulink output to workspace every second

After running the current Simulink model, data will be sent to the workspace through the 'simout' block after the simulation is finished.

Simulink to design a model that should be in real-time transmission over tcp / ip communication

If the Simulink model needs to export data to the workspace during run time every second,

Do you have the necessary blocks or logic?

please help me,,!

Answer 1

[Riya]

Hi Nayong,

I understand that you want to export Simulink output data to the MATLAB workspace every second during simulation run time, rather than only at the end, and then use that data for real-time transmission over “TCP/IP”.

You can refer to the following approach for the same:

Use a “MATLAB “Function” block” to update workspace variables every second. Basically, write a function inside Simulink that assigns the signal value to a variable in the base MATLAB workspace periodically during simulation. You can do this with a “persistent” timer and “assignin” command. Kindly refer to the following sample code:

function y = pushToWorkspace(u, t) 
% u: input signal, t: current simulation time 

persistent lastTime 
if isempty(lastTime) 
    lastTime = -1; 
end 

if t - lastTime >= 1  % Update every 1 second 
    assignin('base', 'latestData', u); 
    lastTime = t; 
end 

y = u; % pass through the signal unchanged 
end 

Here, you need to connect your signal to “u” input and also connect a “Clock” block” to input “t” to get the current simulation time. After running the simulation, you can access the variable “latestData” in the MATLAB workspace, which updates every second.

Alternatively, you can use MATLAB scripts to read workspace variables updated by the Simulink model and then send data using “tcpclient”. Also, Simulink’s “Instrument Control Toolbox” supports “TCP/IP” blocks for sending data.

For reference, Refer to the following MATLAB documentation:

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