Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2017 Feb 22;284(1849):20162867. doi: 10.1098/rspb.2016.2867

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2017 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

PMC Copyright notice

Figure 1. — Set-up for measuring ground reaction forces. An array of 24 three-dimensional force transducers was arranged in four columns and six rows (with one blank column in the centre) to make up half of an octagon (inscribing circle with r = 36 mm). The normal force component (F_z) along the z-axis is pointing from the centre of each sensor to the centre of the column with the tangential force (F_x) perpendicular to it (x-axis). The y-axis was defined along the direction of gravity. Inset: owing to the arrangement of the sensors at 45° to each other, an oblique pull by the frog on the sensor can have a normal force component; therefore, only if F_z > F_x, can a ‘true’ clamping force be distinguished.