<t>Ayman,<br/> <br/> Is there a way to set the range for individual muscle activations - for example say i have two muscles, can i say that muscle1 can have the full range of activation 0.01 to 1.0 and have muscle2 constrained such that it can be activated from 0.5 to 1.0 (during static optimization...

I too am interested in learning if this is possible. Specifically I am interested in changing the minimum activation level for two or three muscles in my model while leaving the rest with the normal activation ranges for static optimization.

<t>What is your x value that you are plotting against? For example if you were to plot active force vs knee joint angle at each point it would compute the maximum isometric force at that point. You can use this as Tim mentioned to look at your strength boundaries or your maximum isometric force or t...

<t>Rahul,<br/> <br/> When you go and plot the tendon and fiber forces I believe that you are plotting the maximum isometric forces computed for that muscle. Essentially the muscle is being maximally activated and the force is being computed with calculations from the hill force length curve assuming...

Does anyone know...
1. If it is possible to create a plug in to implement a new cost function for CMC?

2. Where the cost function is located in the CMC source code?

Cheers!

Joseph,

Thanks that makes sense!

Cheers
Lisa

<t>Does anyone know why when running CMC in the gait2354 model, the MTP and subtalar joints need to be locked? I am trying to run CMC with a feline model of the hindlimb that I developed and the MTP joint is an important joint in the sit-to-stand transition that I am trying to simulate, so I am tryi...

<t>Hi all,<br/> <br/> I was wondering if any of you had used the plug-in feature to implement new cost functions and would be willing to share your examples? I am looking to implement a maxi-mini cost function which minimizes fatigue by maximizing the endurance time of the muscles (Dul et al 1984). ...

Will,

Just updated all of the dynamic parameters in muscle model 4 (time scale, activation1, and activation 2) and now that problem has disappeared. Now the optimization cannot find a solution, but at least that solved the previous problem

Thanks for your help
Lisa

<t>Thanks for the info. I have successfully run Scaling, IK, ID, static opt, and RRA and now just have issues with CMC. So I think it has to be the muscles, and since I am not having issues with Static Optimization I think it has to be some of the dynamic properties including time constants, etc tha...