--- a +++ b/hand/README.md @@ -0,0 +1,33 @@ +# MyoHand 0.1 + +## General: + +The myoHand mujoco musculoskeletal (MSK) model is taking 2 popular OpenSim models: MoBL - human upper +extremity model [https://simtk.org/projects/upexdyn/] and the 2nd-Hand [https://simtk.org/projects/hand_muscle], for hand and fingers MSK model references. + +This generated mujoco MSK model has almost identical kinematics, and very similar muscle kinematics (moment arms) and kinetic (forces) properties. + + +## Conversion process: + +The myoHand model was generated using our developed automatic conversion pipeline (will release at June 2023). + +Three Conversion steps were taken to generate the myoLeg models from the reference Osim model: + +1. Basic element conversion [bone meshes, joint definitions, muscle paths, wrapping objects] +2. Moment arm optimization [matching the moment arm of each muscle by optimizing how muscles wrap over wrapping objects] +3. Muscle force optimizaiton [matching the muscle force-length relationship by optimizing muscle parameters] + +After the conversion, a manual adjusting process is done to correct the abnormal results. + +## Maunal adjustment: +- Adjustments post conversion to optimize for kitnematic and dynamic behaviors +- Inertial properties +- Dynamics properties of the joints + +## Contact Geometries: +- Manually designed with references +- Contact properties optimized for contact rich behaviors + +## Issues: +- N/A \ No newline at end of file