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Why does my acceleration signal from simscape looks so weird?

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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

Accepted Answer

Martin on 22 Jan 2019
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.

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