Why does my acceleration signal from simscape looks so weird?

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Rik Bakker
Rik Bakker 2019-1-6
评论： Rik Bakker 2019-1-25
Can someone help me out?
Why does my acceleration signal look like this? Why isn't it a smooth line?
Is it somewhere in the setting? Did i chose a wrong solver?
The signal is from a transform sensor from Simscape.
figure 3.jpg

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Martin
Martin 2019-1-22
Hi Rik,
Numerical derivatives are inherently noisy, and subject to spikes due to time step differences, jumps in the solution, etc. You may want to filter the signal being differentiated. In Simulinik, a straightforward way to do a first-order filter is to use a transfer function block with 1/(tau*s + 1) where tau is the filtering time constant.
Martin

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