how to reduce fitting error for a model after using parameter estimation tool in simulink

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Mazin Mogadem am 21 Sep. 2020

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https://de.mathworks.com/matlabcentral/answers/597097-how-to-reduce-fitting-error-for-a-model-after-using-parameter-estimation-tool-in-simulink

after using parameter estimation app in simulink and enter the measured data and for input of a current and output of a voltage as real data and having 4 parameters to estimated them in the model. there is a large error of fitting between the 2, even i changed my initial guess and make boundry for parameters also the scale

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our entered data