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elbow flexion moment exoskeleton
Posted: Tue Apr 21, 2020 10:01 am
by danmenpui
Good afternoon, I have tried to connect a spring directly to humerus and ulna, and on the other hand I have connected the same spring to two plates attached to the arm. When comparing the elbow flexion moment, I do not understand why there is such a difference between the two cases.
Does anyone know what happens?
Thank you
Re: elbow flexion moment exoskeleton
Posted: Wed Apr 22, 2020 2:30 am
by sambhav.ratna
Hello Deni Mendez,
The higher moment in case of exoskeleton is probably due to the increased mass. You should check the mass of the two plates you attached to the arm and forearm.
I don't see any other reason.
Re: elbow flexion moment exoskeleton
Posted: Thu Apr 23, 2020 1:52 am
by danmenpui
Good morning, thanks for your reply Ratna.
The mass of the two plates is 0 Kg, I did so precisely so that it did not affect. So I see so strange difference
Re: elbow flexion moment exoskeleton
Posted: Thu Apr 23, 2020 7:10 am
by tkuchida
The moment generated by the spring is the product of its force and moment arm. You could plot the spring's force, length, and moment arm to investigate the discrepancy further.