input 2 expects a value in range [-0.5 0.3], but has a value of 0.442213.

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Mücahit
Mücahit 2024-4-14
编辑： Sanju 2024-4-25
I am trying to control half car model with fuzzy logic controller. no matter what I do with the input and output values, I get the same error. I wonder if I'm making a mistake in the simulink.

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Sanju
Sanju 2024-4-25
编辑：Sanju 2024-4-25
Hi Mücahit,
To fix the error "input expects value in range", you can try out the following steps,
  • Normalize the dataset by dividing each input by its maximum value to ensure uniform scaling.
  • Ignore errors by turning off warnings or changing error settings in the fuzzy logic controller block in Simulink by setting it to "none".
  • Manually adjust the upper and lower bounds for input and output membership functions to accommodate for the error.
  • Increase input range values of the fuzzy inference system (FIS).
  • Employ an additional set of fuzzy rules that consider error derivatives for better control over the fuzzy logic-based controller outputs. Note that this approach requires extra setup work and computation time..
  • Define fuzzy input membership functions capable of handling values outside the specified range to ensure the controller can handle a wider range of input values.
For further assistance please share your model.
You can also refer to the below documentation links for more information,
https://www.mathworks.com/help/matlab/ref/double.normalize.html
Hope this helps!

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