Quote:
Originally Posted by boomergeek
A basic 30 fps video camera is easy to get stop and start points estimated to within 30-60 ms based on multiple playbacks and just counting time by single stepping through frames.
And the data is all recorded so someone else can check the calculation
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The longer I thought about this, the more I liked it
:-)
I put together a
proposed method for analyzing this kind of video data to gain a more accurate characterization of the friction. Right now the acceleration model supports only constant (velocity-independent) friction. But what if the friction is a strong function of velocity?
The proposed analysis shows how to take the distance vs time data from the video and extract from it a 2nd-order polynomial function of friction vs velocity.
If anyone actually runs a video test and analyzes the data, would you share the results with me? If the friction varies strongly with velocity I may be able to modify the acceleration model to reflect that.
If you have data but don't wish to do the analysis, I'd be glad to do it for you and sent you the results.