Realtime data from motor controller

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Chris 2020-12-28

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评论： Mario Malic 2021-1-21

Hello,

I have a question how to plot and show real-time data in App designer, maybe someone can help me, I am beginner in Matlab.

I get my data (e.g. Velocity) easy with webread() in hex and just have to convert into a decimal number, it already works.

But now I don’t know how to write an easy and efficiency program to get actually data e.g. velocity, motor current, torque to show them into two ways in App Designer:

In an EditField to see the Data like a Display
In a plot to see data in a graphic and safe

Thanks a lot for any advice to find a good solution :)

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Mario Malic 2020-12-31

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Hey Christian,

It would be the best if you'd do few introductory examples in App Designer and you'll get an idea how to do your task.

% 1. Set the property value of the Edit Field component this way
app.EditField.Value = 5
% 2. Once you create axes in your app, use plot function
plot(ax, x, y); % ax is the handle to your axes, example app.UIAxes

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Chris 2021-1-21

Hello Mario,

super! Thanks for create a demo app. Everything is working well.

"Another thought: when velocity is zero, signal you get might not be zero, but very low, let's say 1E-3. On plot it will look like it's jumping around, which it actually is but such small number can be neglected."

Exactly, that was the key I had in the beginning really high measurement errors sometimes (1E+9): Now I limited the range in the beginning and the plot is working well.

Mario Malic 2021-1-21