A simplified model for whole-body angular momentum calculation
Related Experiment Video
Updated: Aug 9, 2025

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
Published on: February 10, 2015
Ming Liu1, Amirreza Naseri1, I-Chieh Lee1
1Joint Department of Biomedical Engineering, University of North Carolina and North Carolina State University, Raleigh, North Carolina, United States.
Abstract:
The capability to monitor gait stability during everyday life could provide key information to guide clinical intervention to patients with lower limb disabilities. Whole body angular momentum (Lbody) is a convenient stability indicator for wearable motion capture systems. However, Lbody is costly to estimate, because it requires monitoring all major body segment using expensive sensor elements. In this study, we developed a simplified rigid body model by merging connected body segments to reduce the number of body segments, which need to be monitored. We demonstrated that the Lbody could be estimated by a seven-segment model accurately for both people with and without lower extremity amputation.
Related Concept Videos
Angular Momentum about an Arbitrary Axis
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
Angular Momentum: Rigid Body
This calculation can get complicated when tiny particles within the rigid body are not rotating in the same plane but have...
Angular Momentum and Principle Axes of Inertia
To put this equation into simpler terms, it can be reconfigured using rectangular coordinates. This involves choosing an alternative set of XYZ axes that are arbitrarily inclined with respect to the reference frame. The process of deriving the rectangular...
Angular Momentum: Single Particle
Conservation of Angular Momentum
Euler Equations of Motion

