Thank you very much!

Exactly what I was looking for!

Roger

<t>Hi Ayman,<br/> <br/> Unfortunately I have no idea about bushing force. Could you help me how to implement it or where to find documentation about. <br/> <br/> So far I tried a GeneralizedSpringForce with certain stiffness but this is actually not what I am looking for.<br/> <br/> Thanks a lot...<...

<t>I am actually looking for a torsional spring where the resistance to rotate a body away from it's normal position depends on the angular displacement. I found a class 'torsional spring' but with the information given in the documentation I am not able to implement it in my XML document. For examp...

Hi,

I want to give a certain stiffness to a Custom Joint about one rotational axis. How can I do this?

Thanks for your help

Roger

<t>Hi Anne,<br/> <br/> Unfortunately I do not have an answer to your question. <br/> <br/> But I would like to add a certain stiffness to the joints of a neck model I am working with. There was already a thread about ligaments which you started.<br/> <br/> Could you help me how to include a stiffnes...

<t>Hi<br/> <br/> I am using a neck model, where the movement of the lowest vertebrae (C7) is given as the generalized coordinate (pitch, roll, yaw) and the the movements of the upper vertebrae's are given as CoordinateCouplerConstraints relativ to generalized coordinate. <br/> <br/> Doing ID and SO,...

<t>Hi,<br/> <br/> Using a neck model for simulations, I recognized that locking a custom joint (one of many others) in all degrees of freedom does not lead to the same moments (ID) and muscle forces (SO) as when this joint is replaced by a weld joint. <br/> <br/> Has anybody an explanation for this?...

<t>Hi,<br/> <br/> When computing the moments with inverse dynamics for a given motion I get smaller moments when the speed of motion is increased. So if a certain range (0-60°) of a certain joint is done in 1sec the moments are larger than the resulting moments when the same range is done in 0.2sec....

<t>Hi,<br/> <br/> When performing static optimization on a neck model a force and an activation file is obtained. By plotting the data I was surprised that for some few muscles the activtion curves do not have the same shape as the corresponding force curve. Are the forces not simply activation * ma...

<t>Hi,<br/> <br/> When perfoming static optimization on a neck model with given motion, at certain timesteps I get the failure message: 'opimization failed, model is unsuitable for static optimization' with very high acceleration constraint violations. For most of the other timesteps it works with v...