The attached files..
Dear Forum, There have been a few posts dealing with a similar issue: Inputting kinematics (usually from experimental recording) to a model,...
Hi Cat, So sorry for my delay, I've just returned from traveling over the past two weeks. I don't have much time to report on this now, but in...
Hi, Thank you for the reply. I'm sorry I overlooked the response and just noticed now. This explains what is going on, but I am still confused...
Hi Radu, This was a useful thread, thanks for posting it. I have come across similar issues in one of my models. Did you ever resolve the issue...
Hello, I'm trying to model a frog jump. I have verified my inverse model by comparing simulated versus experimentally estimated torques and...
Thank you very much!
Hi, I have a "frog-like" jumping model with a free joint and three hinge joints. I'm trying to impose joint angle limits on the ankle joint...
OK, thanks for the quick reply. Best, Chris
Dear forum, As the simulation runs, is it possible to programmatically modify the mocap anchor value that is set in the connect equality...
Sorry, never mind - I now realize that this is a feature of version 1.40 which I have not upgraded to yet.
Hello, This should be an easy question - for some reason the fwdinv flag is not working - I get the following error: XML Error: Schema violation:...
I found the issue in my code...
Yes, qvel seems to have no impact on the output of inverse dynamics - I'm quite confused by this. I will double check to see if I am not...
OK, thanks, that's helpful. Just two small further questions: 1. Given that inverse dynamics computes mjData.qfrc_inverse =...
Sorry, I was not clear about my question, let me clarify a couple of points then restate the question: 1. I use radians always. 2. I pre-process...
Actually, it doesn't really work ... there is something wrong with the magnitudes of qfrc_inverse - the values are extremely large (by ~2 to 3...
Yes, I had qvel and qacc expressed mistakenly as quaternions. It works now! Thanks for the help! Best, Chris
Hello again, I now happily have my simulation replaying my experimental kinematics. I've used the following: d -> qpos = quat_data; where...
Hi Again, I recently realized that my convention for defining reference frames is not the standard one. So, after re-calculating my quaternions...
Separate names with a comma.