Problem with hand in fullbody running model

kinematics
#1

Hello,

When I used a running C3D file to simulate the running process, the left-hand markers are right, but it didn’t seem right during the parameter identification process.

image

Was there something wrong? What should I do with it?

Thank you!

#2

Hello,

Is there anyone who can give me a little help with this problem?

Thanks!

#3

Hi Nickel_Lee

To prevent this from happening please try to add a weak soft driver to the wrist abduction and possible also flexion, this can by experience prevent this problem .

Please see this link on an easy way to do this.

https://anyscript.org/ammr-doc/bm_config/mannequin.html

The problem is that the wrist joint is more that just a universal joint it contains a small segment that allow to the flexion and abduction axes to be different located. This small segment can sometimes flip around and this can cause the problem you see.

Best regards
Søren

Best regards
Søren

1 Like
#4

Hi

Thank you for your response.
That helps a lot.

Best regards
Lee