Hello Everyone, I had another question about static optimization and I wanted to see if anyone had any guesses on a solution. I am still using the upper body model doing a simple throwing motion. When I turn all the muscles off and rely only on reserves, static optimization never converges on a solu...

Hello all, I am using an upper body model to determine muscle forces during a throwing motion using static optimization. I was using CMC but I think I've got all the problems ironed out on the CMC end, everything seems to be working fine. With static optimization, I noticed a problem that seems to b...

Hello everyone, I just wanted to clarify something on what reserve forces are. If a reserve force is for a translational degree of freedom, does it represent force in Newtons? And also, if a reserve force is for a rotational degree of freedom, does it represent torque in Nm? Thanks for any help. Bra...

Hello everyone, I had a question about coordinate limits during a run of computed muscle control. Are coordinates allowed to take on a value above or below the specified limits inside the model during computed muscle control? If so, how can I change that such that they stay inside the limit? Thanks,...

Hello Ursula,

Thank you so much for your advise on how to proceed. What you told me is also what my adviser told me, so that is the approach I will take.

Again, thanks for the help.

Brandon

Hello all, I am trying to normalize electromyography signals taken during an exercise in which I also obtained kinematic data. I have used the kinematic data to get activations from CMC and want to accurately compare them to the obtained EMG signals. I filtered the EMG signals by putting them throug...

Hello all,

I was curious about the minimum time step needed for CMC. What is the highest number I could set the CMC time steps to be for things like forces and forward dynamics to be accurate?

Thanks for any help anyone could give.

Hello all, I am using an upper body model to simulate a simple throwing motion. After running the scaling and kinematics, I get an error of around .09 meters in the marker which produces the maximum error during the motion itself. Prior to the motion, in the period of time when the subject is in the...

Hello all, After performing a muscle analysis using the CMC results I got with my model and kinematic data, I tried to graph the moment arm of a particular muscle from the analysis by looking at the moment arm files. When I do this, I get the following message "The file Specified: 'file name' is cor...

Hello everyone, The reason the computed muscle control forces were going beyond the maximum isometric force is because the passive forces were indeed very large at the elbow-flexion angle considered in my model. It is the active force and not the passive force that should be below the maximum isomet...