Inverse Kinematics problem with full-body model
Posted: Mon May 28, 2012 3:54 pm
Dear OpenSim users and developers,
I have collected full body motion capture data for arm movement. Now I'm trying to analyze this data with OpenSim software and SIMM full body model imported to OpenSim. I have created marker set that corresponds to our mocap laboratory setup. I scale model according to subject data from experiment. Next step I run Inverse Kinematics tool, and here comes problem. OpenSim hanged, without showing any progress or error. Later I left it working for hours and Inverse Kinematics tool stopped after 10 hours of running with some "Unknown error".
Than I thought that it could be problem with my data and to check, whether this is the case I tried to make OpenSim analysis of trc files from example Gait2354_Simbody. I tuned markers on full-body model to match markers from example, used same scale settings, as in example and same IK settings as in example. But when I start IK, it calculates something (i see high processor load) for couple of hours and throws same exception. I tried to modify scaling, disable part of degrees of freedom, run simulation on other computer, but without success. Problem can't be in data or settings, because with Gait2354 model everything works smoothly and fast.
Maybe you have some suggestions concerning cause of this problem? Has somebody seen similar behavior? Has somebody worked with SIMM full-body model in OpenSim? Are there some tricks?
I would appreciate any help or suggestions. Thank you in advance,
Myroslav
I have collected full body motion capture data for arm movement. Now I'm trying to analyze this data with OpenSim software and SIMM full body model imported to OpenSim. I have created marker set that corresponds to our mocap laboratory setup. I scale model according to subject data from experiment. Next step I run Inverse Kinematics tool, and here comes problem. OpenSim hanged, without showing any progress or error. Later I left it working for hours and Inverse Kinematics tool stopped after 10 hours of running with some "Unknown error".
Than I thought that it could be problem with my data and to check, whether this is the case I tried to make OpenSim analysis of trc files from example Gait2354_Simbody. I tuned markers on full-body model to match markers from example, used same scale settings, as in example and same IK settings as in example. But when I start IK, it calculates something (i see high processor load) for couple of hours and throws same exception. I tried to modify scaling, disable part of degrees of freedom, run simulation on other computer, but without success. Problem can't be in data or settings, because with Gait2354 model everything works smoothly and fast.
Maybe you have some suggestions concerning cause of this problem? Has somebody seen similar behavior? Has somebody worked with SIMM full-body model in OpenSim? Are there some tricks?
I would appreciate any help or suggestions. Thank you in advance,
Myroslav