[Beginner] Simulink - Active Low Pass Filter of 1st Order

Hello everyone, I am not really familiar with Simulink and I have some difficulties to build my model. I have to make an Active Low Pass Filter of 1st Order like this :

The problem is that I have many errors when I try to run the simulation with my actual model

I don't know with block should I use to make a good model and measure the gain (dB) depending the frequency (Hz).

Thank you for your help.

Answer 1

[@Johannes]

Hello,

what kind of errors are appearing? What Version of Matlab do you use? Is it possible to upload the Model to MatlabAnswers?

Regards, John

Answer 2

[Quentin MOUTY]

Hello, I use Matlab 2014, I upload the model and i have the following error :

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Initial conditions solve failed to converge. ...Problems possible for transient initialization, as well as stepsize control for transient solve, due to equations of one or more components: 'HW2_2_1/AC Voltage Source' Equation locations are: 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/source.ssc' (line 23) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+sources/ac_voltage.ssc' (line 29)

'HW2_2_1/Capacitor' Equation locations are: 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/capacitor.ssc' (line 45) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/branch.ssc' (line 23) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/capacitor.ssc' (line 44)

'HW2_2_1/Op-Amp' Equation locations are: 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/op_amp.ssc' (line 32) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/op_amp.ssc' (line 33) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/op_amp.ssc' (line 34)

'HW2_2_1/Resistor' Equation locations are: 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/branch.ssc' (line 23) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/resistor.ssc' (line 26)

'HW2_2_1/Resistor1' Equation locations are: 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/branch.ssc' (line 23) 'D:/Program Files/MATLAB/R2014a/toolbox/physmod/simscape/library/m/+foundation/+electrical/+elements/resistor.ssc' (line 26) Component: Simulink | Category: Block error

[@Johannes]

It´s me again. Thanks for the errormessage. Now it would be great if you upload the model.