What is it about?

Usually, the measurements, which are taken with 3D gyroscope, are interpreted as three sequential rotations around gyroscope axes in each sample interval. If the angle of the rotation between the two samples is relatively small (less than 1 degree), the obtained spatial orientation is approximately correct. However, with an increment of this angle (lower sample rate and/or faster rotation) the systematic error caused by noncommutativity of rotations increases. The paper explains the correct way of interpreting these measurements as simultaneous rotations around the three orthogonal gyroscope axes.

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Why is it important?

WEarable 3D gyroscopes are increasingly used to track orientation in human movement in sports and rehabilitation. It is essential that the measurement results are correctly interpreted. The method of calculating the spatial orientation, which is proposed in the article, enables a more precise determination of the orientation even at lower sampling frequencies.


We will use this method in biomechanical feedback application for speeding the learning process in sports like golf, tennis, etc.

Saso Tomazic
University of Ljubljana

Read the Original

This page is a summary of: On the Interpretation of 3D Gyroscope Measurements, Journal of Sensors, January 2018, Hindawi Publishing Corporation, DOI: 10.1155/2018/9684326.
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