Beyond velocity and acceleration: jerk, snap and higher derivatives (2016)

(iopscience.iop.org)

181 points EndXA | 1 comments | 19 Jun 24 10:16 UTC | HN request time: 0.204s | source

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londons_explore ◴[19 Jun 24 11:39 UTC] No.40727286[source]▶

I wish designers of vehicles - particularly cars, trains and busses, would work to minimize jerk, snap and crackle.

Turns out if you minimize those, you get a far more comfortable ride. It matters far more than acceleration.

Finite element models of the whole system (tyres and suspension components and flexing elements of the vehicle body and road/track) can quickly allow analysis of the jerk, snap and crackle, and allow tuning of damping and drive system control loops to make a far more comfortable ride.

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amelius ◴[19 Jun 24 11:42 UTC] No.40727304[source]▶

>>40727286 #

Do you have proof for that, or is this like audiophiles asking for gold connectors because "they make the sound better"?

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1. user_7832 ◴[19 Jun 24 13:06 UTC] No.40727925[source]▶

>>40727304 #

In railroad design it is important for the track to not be a curved segment of a circle (starting from a straight line), as the acceleration forces start suddenly (aka a high jerk). So this concept exists and is well known in some circles (heh).

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