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- Title
Development and Validation of an Active Muscle Simplified Finite Element Human Body Model in a Standing Posture.
- Authors
Lalwala, Mitesh; Devane, Karan S.; Koya, Bharath; Vu, Linh Q.; Dolick, Kevin; Yates, Keegan M.; Newby, Nathaniel J.; Somers, Jeffrey T.; Gayzik, F. Scott; Stitzel, Joel D.; Weaver, Ashley A.
- Abstract
Active muscles play an important role in postural stabilization, and muscle-induced joint stiffening can alter the kinematic response of the human body, particularly that of the lower extremities, under dynamic loading conditions. There are few full-body human body finite element models with active muscles in a standing posture. Thus, the objective of this study was to develop and validate the M50-PS+Active model, an average-male simplified human body model in a standing posture with active musculature. The M50-PS+Active model was developed by incorporating 116 skeletal muscles, as one-dimensional beam elements with a Hill-type material model and closed-loop Proportional Integral Derivative (PID) controller muscle activation strategy, into the Global Human Body Models Consortium (GHBMC) simplified pedestrian model M50-PS. The M50-PS+Active model was first validated in a gravity standing test, showing the effectiveness of the active muscles in maintaining a standing posture under gravitational loading. The knee kinematics of the model were compared against volunteer kinematics in unsuited and suited step-down tests from NASA's active response gravity offload system (ARGOS) laboratory. The M50-PS+Active model showed good biofidelity with volunteer kinematics with an overall CORA score of 0.80, as compared to 0.64 (fair) in the passive M50-PS model. The M50-PS+Active model will serve as a useful tool to study the biomechanics of the human body in vehicle–pedestrian accidents, public transportation braking, and space missions piloted in a standing posture.
- Subjects
UNITED States. National Aeronautics &; Space Administration; HUMAN body; POSTURE; POSTURAL muscles; FINITE element method; HUMAN mechanics; PUBLIC transit
- Publication
Annals of Biomedical Engineering, 2023, Vol 51, Issue 3, p632
- ISSN
0090-6964
- Publication type
Article
- DOI
10.1007/s10439-022-03077-x