How to show a figure in the MATLAB App designer with both X and Y axis from signal in simulink real-time model?

How can we customize the x-axis of the instrumented axes in MATLAB App (with model running on Speedgoat)? I wanted to plot Speed vs Torque (signals from Simulink model) (in the axes) instead of separately plotting them with respect to time.

Answer 1

[Tejas]

Hello Devesh,

Start by adding an 'Axes Component' in App Designer. Below this component, place a button and assign a 'ButtonPushed' callback to it. Within this callback, follow these steps:

• Create a target object using 'slrealtime' to fetch real-time data from Speedgoat. Refer to this documentation for more details on 'slrealtime': https://www.mathworks.com/help/releases/R2022b/slrealtime/api/slrealtime.target.slrealtime.html

    target_object = slrealtime('TargetPC1'); 

• Fetch real-time speed and torque data using 'getsignal'. More information about this function can be found in the documentation: https://www.mathworks.com/help/releases/R2022b/slrealtime/api/slrealtime.target.getsignal.html

    speedData = getsignal(target_object, 'blockPath', portIndex); 
    torqueData = getsignal(target_object, 'blockPath', portIndex); 

• Use the 'plot’ function to display the speed and torque data.

    plot(app.UIAxes, speedData, torqueData); 

With this setup, each time the button is clicked, real-time speed and torque data will be fetched and plotted in App Designer.