Simulink || Sawtooth carrier wave distorted at variable-step solver

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Ali Fuat Becan 2017-8-21

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https://ww2.mathworks.cn/matlabcentral/answers/353506-simulink-sawtooth-carrier-wave-distorted-at-variable-step-solver

评论： Aveek Podder 2017-8-24

Hello,

I am designing a converter algorithmically with a PI controller, and I have a simple yet irritating issue so far regarding the solver that I cannot fully understand yet. The issue is that the signals I put through a controller becomes noisy and distorted. I have an image of an A=[0,1] sawtooth wave I generate from a repeatable table unit, and at e-6 maximum step size with no zero-crossing, I obtain a signal that does not always hit minimum or maximum values when it is supposed to, and it even tends to dip.

I believe this is more computer performance related than Simulink configs related, but in case it does not matter, could I ask for tips and hints to correct this noise and distortion problem? This is a very common recurring problem I had to deal with repeatedly for a long time, thus I would greatly appreciate any support on this issue.

Yours truly, Ali