- In the ‘ForcePlateType2AutoDetection.any’ file, there are two folders such as:
ContactDetectionLimb1 (usually for Right foot)
ContactDetectionLimb2 (usually for Left foot)
In these folder there is a folder which is called ‘PlateFootReactions’.
In this folder, there are several artificial muscle objects which transfer the forces to human feet. So you can check whether the forces in these artificial muscles are zero or not.
- In the ‘ForcePlateType2.any’ file there is a folder which is called ‘PlateFootReactions’.
So you can check whether this forces are zero or not.
This is my best answer about how to check whether the force from the plate is delivered to human foot or not.
Pulled up ChartFX and tracked all the way to PlateFootReactions, only saw one muscle to graph, it was MusMdl.
Q-1, Is this the right path?, see attachments.
So looking at a MusMdl for plate 1 and 4, for both limbs.
- For plate 4. For the MusMdl muscle activity, there was a value of 1.000e+004 for Limb 1. For limb 2 the MusMdl activity value was zero.
-But for Plate 1, both left foot and right foot the value for MusMdl was zero. So maybe MusMdl means muscle middle. And it is zero for the right foot because only the heel of the right foot is touching plate 1.
Q-2, If this is true how do we check… for muscle heel, I don’t see a muscle heel in this path?
MusMdl is a muscle model, not the muscle itself.
In the PlateFootReactions folder, there are following AnyGeneralMuscle objects which transfer the forces from the plate to the foot:
FxPos, FyPos, FzPos, FxNeg, FyNeg, FzNeg, MxPos, MyPos, MzPos, MxNeg, MyNeg, MzNeg.
Prefix (Fx, Fy, Fz, Mx, My, Mz) means that each component will represent either force or moment. Suffix(Pos, Neg) means the the direction of each component.
So the sum of the forces and moments from these 12 AnyGeneralMuscle objects will be the net effect from the force plate to the foot.
The easiest way to do that is to use AnyForceMomentMeasure2 object.
I recommend you to read the detail description of AnyForceMomentMeasure2 class in the reference manual.
I tried to find the reference manual and only got this message that it was not available on line. http://www.anybodytech.com/index.php?id=712, Can you help me how to get the reference manual please.
Yes I saw that folder and those forces, but there is only one set of forces, Fx, Fy, Fz., and the foot is touching two force plates at the same time.
So, I think your saying to use “AnyForceMomentMeasure2 object”, to get the net effect from FxPos, FyPos, FzPos, FxNeg, FyNeg, FzNeg, MxPos, MyPos, MzPos, MxNeg, MyNeg, MzNeg., and compare this value with what is in Vicon. And since the foot is touching two plates at the same time, and there is two force vectors, would I compare the “AnyForceMomentMeasure2 object” value to an approximated sum of the two force plate values in Vicon. So for example can I get the Fz value using “AnyForceMomentMeasure2 object” and compare this to the sum of the two force plate values in Vicon for Fz?
Sorry for late reply. I had been out of office for business.
You can find the reference manual of AnyBody by choosing the ‘Help’->‘AnyScript Reference’ menu in the top menu bar.
Yes. If you can define your own ‘AnyForceMomentMeasure2’ object well, then the resultant forces and moments which are acting on the human foot will be almost as same as the sum of the forces and moments from those two force plates.
Thanks for the help with this. It looks like there is still more work to do with this. So, since I don’t have many force plate problems that need this fix, I think we should go forward working on the Box. So, I’ll go back to the box thread until we figure that out to completion.