Abstract
We present an open source software implementation of a popular mathematical method developed by M.R. Yeadon for calculating the body and segment inertia parameters of a human body. The software is written in a high level open source language and provides three interfaces for manipulating the data and the model: a Python API, a command-line user interface, and a graphical user interface. Thus the software can fit into various data processing pipelines and requires only simple geometrical measures as input.
Highlights
For dynamic analyses, it is typical to treat the human body as a collection of linked rigid bodies
The original source code is available in his dissertation but is not adaptable for inclusion in modern software packages, is not copyrighted under a liberal reuse license (i.e., Creative Commons AttributionNonCommercial-NoDerivs 2.5), and is not very user friendly
Because we often make use of Yeadon’s model in our research, we developed a modern object oriented program under a permissive license that allows for incorporation into other software packages and includes a graphical user interface for ease of use
Summary
It is typical to treat the human body as a collection of linked rigid bodies. The model is completed with analytical expressions for a stadium solid’s and semiellipsoid’s center of mass location and moments of inertia, using the parallel axis theorem to combine the inertial properties of multiple stadium solids. Yeadon provides these explicit formulae in[12]. The combined mass and center of mass location of the human and the rear frame of the bicycle are computed and the parallel axis theorem is employed to express the moments of inertia of each body about the combined center of mass, where they are summed to get the combined moments of inertia
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