Slow simulation with noisy output

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Alexandre 2014-9-3

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https://ww2.mathworks.cn/matlabcentral/answers/153289-slow-simulation-with-noisy-output

关闭： MATLAB Answer Bot 2021-8-20

Hi,

i have this issue with slow simulation time for a stable first order tranfers function.

I've tested it with and without the Dead zone and I get the same results. The Scope1 show a intense oscillation of the output.

Thanks

Alexandre

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Aniruddha Katre 2014-9-3

This behavior stems from the fact that the time-step taken by the solver is so large that it fails to capture the dynamics of the system, which has a bandwidth of 200000 rad/s.

Consistent with the Nyquist sampling theorem, if you run the simulation using a fixed-step solver with step size of around 1/400000, then you will not observe this kind of oscillation.

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