<t>Hi Anantharaman,<br/> It sounds like you are using an old version of SIMM. Support for moving muscle points was added to version 5.0 last year. I tested the files exported by OpenSim 2.2.1 and they load OK into SIMM 5.0 as well as version 6.0, which was released last month and is available on the...

<t>Hi Elizabeth,<br/> <br/> The differences in passive force are due to the different muscle models in OpenSim and SIMM. Here's the history:<br/> <br/> SIMM uses a natural cubic spline to represent the passive force-length<br/> behavior of muscle fibers. This spline is specified in the muscle file a...

<t>Hi Daniel,<br/> <br/> If I understand your two cases correctly, I would<br/> expect different ID moments for them. If your<br/> right leg model has no torso, etc., then I'd<br/> expect the ID moments to be incorrect (one reason<br/> being that the ground-reaction forces are from<br/> a full body)...

<r>Hi Paul,<br/> <br/> I checked the visual representation of the subtalar<br/> axis in SIMM on the same model, and it does indeed<br/> look like 38 deg inclination and 9 deviation. This<br/> model has the same joint axis definitions as the<br/> ones defined by Scott Delp for his dissertation<br/> m...

<t>Hi Pablo,<br/> <br/> I am just finishing up a utility program that will<br/> convert TRB and ANB files into the OpenSim format.<br/> It uses your existing forcepla.cal file to<br/> calibrate and convert forces from any force plates, and divide them into left and right sides.<br/> It will also con...

<t>Hi Kai,<br/> <br/> I sent you a message through simtk.org regarding<br/> this, so that I can send you the converted model<br/> directly. Also, we will post converted OSIM versions<br/> of the wrist model and the upper extremity model<br/> to their respective project pages in the near<br/> future....

<t>Hi Amirrezq,<br/> <br/> This is a bug in v1.8 (the wrist model cannot be<br/> converted to an SD/FAST-based model, but it can<br/> be converted to a Simbody-based model, which is<br/> what OpenSim uses). This will be fixed in the next<br/> release. In the meantime, I will send you the<br/> proper...

<t>Hi Giordano,<br/> <br/> You should be able to adjust the <location> values<br/> in the CustomJoint to get the desired kinematics.<br/> The <location_in_parent> values specify the location<br/> of the joint center in the parent body's reference<br/> frame, and the <location> values specify the joi...

<t>Dan,<br/> <br/> Deform objects (and constraint objects) are not<br/> currently supported in OpenSim. It's hard to say<br/> if/when they will be supported; there are not<br/> any plans to add them in the next 6-12 months,<br/> but that could change.<br/> <br/> You could use software such as Rhino ...

<t>Hi Istvan,<br/> <br/> As Ayman said, the upper extremity model is a<br/> complex one to start with. And I think that you'll<br/> need some source code that has not been released<br/> yet in order to run dynamic simulations on that<br/> model. But in any case, here's what to do when<br/> you get t...