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Reference for Accurate Human Joint Constraints?

Discussion in 'Physics' started by oldhighscore, Jan 19, 2021.

  1. oldhighscore

    oldhighscore

    Joined:
    Nov 28, 2020
    Posts:
    79
    Trying to setup constraints for a humanoid w/ procedural animation application. Google searching has left me with mixed results / incomplete data.

    Can anyone provide me a reference for listing of typical constraints between joints and bones for the human body?

    i.e. Assuming a human is facing +z and up is +y the knee joint can rotate 120 degrees about the x axis, the heel can rotate towards +z 20 degrees and backwards 10 degrees. Looking for w/e info to help enforce swing and twist constraints.
     
  2. AlTheSlacker

    AlTheSlacker

    Joined:
    Jun 12, 2017
    Posts:
    326
    Try this:

    https://www.dshs.wa.gov/sites/default/files/forms/pdf/13-585a.pdf

    Human strength characteristics are well defined in some NASA work (but it is of an age where you have to watch the units)

    https://msis.jsc.nasa.gov/sections/section04.htm#_4.9_STRENGTH

    If you are interested in the motion limit stiffness values, then you could do worse than looking at automotive safety test dummies (search for Hybrid 3 and EuroSID 2, spine data is not useful, but limbs will be OK. H3 neck for longitudinal, ES2 for lateral), these will at least give you characteristics that are stable at high load. I would avoid cadaveric data as it tends to be very noisy, loading specific and awkward for modelling.
     
    XiaotangZhang and oldhighscore like this.
  3. oldhighscore

    oldhighscore

    Joined:
    Nov 28, 2020
    Posts:
    79
    This info is exactly what I was looking for, thank you so so much :D