## Search found 375 matches

- Wed Jul 25, 2012 12:07 pm
- Forum: OpenSim
- Topic: Asymmetry in states of symmetric two-legged model
- Replies:
**5** - Views:
**816**

### Re: Asymmetry in states of symmetric two-legged model

Hi Ayman, That makes sense re: constraint tolerances, etc. It is indeed a MovingPathPoint, but both the splines defining its position as a function of the coordinate value (the knee angle, in this case) are also different, along with the positions specified in the <location> tag. The <x> values for ...

- Wed Jul 25, 2012 9:59 am
- Forum: OpenSim
- Topic: Asymmetry in states of symmetric two-legged model
- Replies:
**5** - Views:
**816**

### Re: Asymmetry in states of symmetric two-legged model

Hi Ayman, It looks like all the definitions are completely symmetric in the model now (the one I'm using), but I still get some small asymmetries. They are functionally pretty meaningless (like a few hundredths of a degree at most). I'm not sure why. I have all the non-saggital DOF locked but the gr...

- Wed Jul 25, 2012 8:49 am
- Forum: OpenSim
- Topic: plotting length
- Replies:
**2** - Views:
**404**

### Re: plotting length

Hi Caterina, I'm not sure how to plot ligament object lengths exactly, but if the ligament length is not showing up as a plotting choice, you could create a new muscle model that has the same coordinates as the ligament, and zero out its active and passive force properties. Then you can plot it as y...

- Tue Jul 24, 2012 3:02 pm
- Forum: OpenSim
- Topic: Asymmetry in states of symmetric two-legged model
- Replies:
**5** - Views:
**816**

### Re: Asymmetry in states of symmetric two-legged model

Found it, the muscles weren't actually symmetric. It looks like there's a discrepancy in the 4th path coordinates on the left and right side for the vastus intermedius (aside from the flipping of the z-coordinate). Here's for vas_int_r: <location> 0.05546322 0.02529232 0.00180000 </location> and for...

- Tue Jul 24, 2012 11:49 am
- Forum: OpenSim
- Topic: Asymmetry in states of symmetric two-legged model
- Replies:
**5** - Views:
**816**

### Asymmetry in states of symmetric two-legged model

Hi all, I'm working with a two legged model (a modified version of the Hamner full-body model). The model definition appears to be bilaterally symmetric in both the skeleton and the muscles (i.e. the left leg is a mirrored copy of the right leg). However, when I run forward simulations with the mode...