Measurements of the Mechanical Impedance and Vibration Power Absorption for Varying Grip and Push Forces for Rotatory Excitation around the zh-Axis

For each subject 10 additional measurements at random grip and push force combinations were recorded for validation purposes. The subjects were randomised to hold the force levels while the measurement handle was excitated around the lower arm axis (zh-axis according to DIN5349:2001) to their hand-arm system via a shaker system, with the posture of the subjects lying within the ranges specified in ISO 10819:2022.

The measuring handle on which the study was conducted complies with the specifications in ISO10068:2012 for translatory excitations. To calibrate the handle for rotational excitation, a calibration function was calculated by exciting the handle with different weights. The excitation was a multisine with frequencies between 10 to 500 Hz in 5 Hz increments.