Unreasonable IK results
Posted: Fri Jan 16, 2015 3:03 pm
Hello Everyone,
I am using OpenSim to calculation joint angles during gait. I define a markerset, scaled the model and do the IK calculation(see attachments). However, when I plot the results, I found unreasonable hip flexion (~25degrees) at neutral standing position where obviously it should be about 0. I changed the weights of different markers, and the results just changed to 12.5 degrees, so the results largely depends on the specified value, is there a standard on how to define the weights, otherwise how can I believe the results. I attached the files so that you could kindly help me check what is going wrong. Thank you!
One more thing to mention is that when defining the markerset, I added some markers, since I didn't find any reference on the coordinates of these markers, I input an estimated value, will this largely influence the results?
Happy weekend!
I am using OpenSim to calculation joint angles during gait. I define a markerset, scaled the model and do the IK calculation(see attachments). However, when I plot the results, I found unreasonable hip flexion (~25degrees) at neutral standing position where obviously it should be about 0. I changed the weights of different markers, and the results just changed to 12.5 degrees, so the results largely depends on the specified value, is there a standard on how to define the weights, otherwise how can I believe the results. I attached the files so that you could kindly help me check what is going wrong. Thank you!
One more thing to mention is that when defining the markerset, I added some markers, since I didn't find any reference on the coordinates of these markers, I input an estimated value, will this largely influence the results?
Happy weekend!