Modeling the Biomechanics Parameters on Achilles Tendon Using OpenSim Simulations and Validating the Sensor Accuracy

OpenSim is a free software platform that enables the user to preform interaction and movement simulations with human, animal, and robotic models. The software is accompanied by a vast user database of simulations and models which is available on the online community. By utilizing the resources available an accurate model can be created to represent any musculoskeletal configuration that happens in day-to-day activities. Forces and moments are calculated experimentally and verified by the OpenSim models for the Achilles Tendon. In this study, the muscle actuation of the Achilles Tendon is collected from multiple subjects and analyzed. Five subjects were tested for the data collection. Data was collected while the participant completed a concentric motion to ensure Achilles Tendon activation. The testing setup utilizes 3 miniature PCB accelerometers, a PCB 4-channel signal conditioner, a DAQ chassis, and a Modally Hand Impact Hammer in tandem with NI signal view express and MATLAB. Once the results from the study were analyzed, a virtual model was setup in the same configuration in OpenSim and the results from the simulation were compared to the results from the testing. The mechanical forces on the Achilles Tendon will be analyzed using the OpenSim software in order to better understand the muscle actuation at various loading levels. The proposed methods offer a non-invasive approach for studying in vivo muscle-tendon mechanics.