Date: Fri, 2 Jun 2023 02:07:26 +0100 (BST) Message-ID: <1484941510.11341.1685668046679@OMGSVR86> Subject: Exported From Confluence MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_Part_11340_49475182.1685668046679" ------=_Part_11340_49475182.1685668046679 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Content-Location: file:///C:/exported.html Vicon ProCalc Force Vector Tutorial

# Vicon ProCalc Force Vector Tutorial

From ProCalc 1.4 and later, force plate data became = more integrated than in previous versions of ProCalc. The functions and cal= culation methods that were introduced enable the researcher to calculate sp= atial relationships between the position and orientation of the force vecto= r, and other 3D entities such as trajectories.

This tutorial shows a potential use case for these features.

## Fe= atures covered in this tutorial

These new features were introduced in ProCalc 1.4 and are described in t= his tutorial:

• The Center of Pressure (CoP) point for the force plate
• The force vector
• Calculating the shortest line between two other lines

## Example= research questions

Postural research is often concerned with answering questions about a pe= rson's symmetry when standing, walking or performing other common movements= . For example, it may be of interest to measure how asymmetric a person's s= tanding posture is.

If the motion measurement lab has both a 3D Vicon system and one or more= force plates, several useful calculations can be made.

This tutorial looks at the following measurements:

1. The position of the CoP compared to the position of the feet. Does the = person lean more on one foot than the other?
2. The position of the ground reaction force vector compared to the pelvis= inter-ASIS line. Does the person lean forwards, backwards or sideways?

## Further uses of the new functionality

This tutorial demonstrates how you can use data from force plates to cal= culate static parameters, but the new functionality could also be used for = dynamic variables (for example, if you are interested in the moment arms fr= om the ground reaction force relative to a joint center), or to define even= ts (for example, the peak force event).

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