Sims, "Three-dimensional

acceleration measurement using videogrammetry tracking data," Experimental Mechanics, vol.

To measure trunk movements, specifically shift and sway, we used the Xbus Master (Xsens Technologies B.V.), a lightweight (330 g) and portable device using MTx units for orientation and

acceleration measurement of body segments (see Figure 1).

As expected for a bias or a scale factor on the odometric measurement, the

acceleration measurement shows a punctual perturbation during the appearance (and disappearance) event but a nonprominent one for the duration of the disturbance.

Morgenthal and Hopfner [9] investigated the effect of sampling rate on

acceleration measurement. Android device (version 2.3) recorded acceleration data of shaking table with a sampling rate of 27 Hz under excitations of different frequencies.

This work employs ADXL203 a high precision, low power complete dual axis

acceleration measurement system on a single, monolithic IC.

Acceleration measurement records the rate of change in velocity.

This rotation of the acceleration corrupts the longitudinal

acceleration measurement along the stance by the time-varying projection of gravity (this term is smaller than 0.5 m/[s.sup.2] for a walking pedestrian but could be larger if he is running).

In this study, a device and a method for the in situ measurement of a roll shell runout, based on the radial

acceleration measurement of the surface, is described.

Chosen hardware LIS3LV02DLH is sufficient for walking, running and similar types of activities

acceleration measurement (up to 11% error is expected).

For better clarity and comparability of results, gravity of Earth was eliminated from

acceleration measurement results before data processing.