fix: Cervical spine axial rotation rhythm coefficient fix (#23)

* Bug fix cervical spine axial rotation rhythm coefficient. The distribution between C2C1 and rest of cervical spine was incorrect. * update changelog * Apply suggestion to use coefficients from rhythm data file. Co-authored-by: Morten Enemark Lund <[email protected]> Signed-off-by: divyaksh-chander <[email protected]> --------- Signed-off-by: divyaksh-chander <[email protected]> Co-authored-by: Morten Enemark Lund <[email protected]>
AnyBody · Sep 28, 2024 · 1b487a9 · 1b487a9
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diff --git a/Body/AAUHuman/Trunk/JointsCervical.any b/Body/AAUHuman/Trunk/JointsCervical.any
@@ -219,8 +219,7 @@ AnyFolder Rotation = {
 
    RhythmDriverLinear rhythmC2C1SkullThoraxRotation( _REDEFINE_VARIABLES=On) = 
    {
-     // The -1 is because C2C1 is a revolute jnt and has the opposite signs for output.
-     AnyVector RhythmCoefficients ??= {132/77, -1};
+     AnyVector RhythmCoefficients ??= {0.2721+0.3061, 0.2721};
 
      Measures.Input  = {
        AnyKinMeasure& ref = ...SkullThoraxRotation;

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,6 +14,7 @@ The default pelvis model used in all models have changed. The pelvis morphology
 **Fixed:**
 
 * Fixed the inclusion of the buckle segmental masses in the calculation of the TotalBodyMass variable.
+* Fixed the cervical spine axial rotation rhythm coefficients. The distribution between C2C1 and the rest of cervical spine was incorrect.
 
 **Added:**