Reaction force in knee joint

Main Forum
1

Hello, everyone.
Could you please explain for me why it has more than 3 components of reaction force at knee joint? (attached image) This results was taken from GaitLowerExtremity model of AMMRV 1.5.

Thank you.

2

Dear Tien Trinh,

The default knee joint type of our human model is a revolute joint.

A revoulte joint has 1 degree of freedom, and there are 5 constraints.

So there are 3 reactional forces and 2 reactional moments in the knee joint.

Best regards,
Moonki

3

Thank you for your answer. I have one more question:
Can I modify the model of lunge activity to perform squat activity? If it is possible, could you please give me some instruction? ( I had mocap data of squat activity)

4

Dear Tien Trinh,

We would appreciate very much if you can make only one post at a time.

We will try to answer your most recent post.

Thanks.

Best regards,
Moonki

5

I understood. I am sorry about that.
Thanks for the notice.