Forward dynamic simulation provides a powerful framework for characterizing in vivo loads, for investigating the muscular coordination of movement, and for predicting changes in movement due to injury, impairment or surgical intervention. However, the computational challenge of generating simulations has greatly limited the use and application of dynamic models. Traditional approaches use optimization to determine a set of input trajectories (e.g. muscle forces or joint torques) that drive a model to track experimental motion and force measurements [1,2]. Optimization is needed, in part, to resolve dynamic inconsistencies between measured kinematics and ground reactions. Large scale dynamic optimization problems of this type are inherently difficult to solve, often necessitating model simplifications. It has previously been shown that dynamic inconsistencies can be efficiently resolved on a per-frame basis by enforcing whole-body dynamic constraints [3,4]. However, forward simulations cannot be generated from such data since integration of the accelerations will not re-produce measured velocities and positions.
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ASME 2007 Summer Bioengineering Conference
June 20–24, 2007
Keystone, Colorado, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
0-7918-4798-5
PROCEEDINGS PAPER
Optimal Estimation of Dynamically Consistent Kinematics and Kinetics for Forward Dynamic Simulations
Christian D. Remy,
Christian D. Remy
University of Wisconsin-Madison, Madison, WI
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Darryl G. Thelen
Darryl G. Thelen
University of Wisconsin-Madison, Madison, WI
Search for other works by this author on:
Christian D. Remy
University of Wisconsin-Madison, Madison, WI
Darryl G. Thelen
University of Wisconsin-Madison, Madison, WI
Paper No:
SBC2007-176521, pp. 25-26; 2 pages
Published Online:
March 12, 2014
Citation
Remy, CD, & Thelen, DG. "Optimal Estimation of Dynamically Consistent Kinematics and Kinetics for Forward Dynamic Simulations." Proceedings of the ASME 2007 Summer Bioengineering Conference. ASME 2007 Summer Bioengineering Conference. Keystone, Colorado, USA. June 20–24, 2007. pp. 25-26. ASME. https://doi.org/10.1115/SBC2007-176521
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