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

The data set consists of five types.
1) In table AnthroDemoMaxForcesTable.mat the anthropometric data, the gender and the maximum grip and push forces of the subjects are listed.
2) In Matrix resultsMatrix.mat the mechanical impedance and the phase angle of the measurements of the subjects study are summarized. The resulting mechanical impedance and the phase angle are already calibrated in each direction and can be used directly from the matrix. The matrix consists of two dimensions, the first is the mechanical impedance and the phase angle around the direction of excitation (xh), the second dimension is the cross-axial mechanical impedance and the phase angle around the zh-axis. The directions are named according to the coordinate system of DIN 5349:2001. Each row of the matrix represents one measurement. The following data information and results are in the corresponding columns:

1: number of the subect
2: is 0 if the grip and push forces during the measurements are within the range of 5N and 14%, otherwise a 1 is at this position. This can be used for data exclusion.
3: predefined push force value
4: predefined grip force value
5: experiment number according to the resultsMatrix for each subject
6: sequence of the taken measurements of each subject, due to a randomized test plan
7: mean measured grip force
8: median measured grip force
9: standard deviation of the measured grip force
10: mean measured push force
11: median measured push force
12: standard deviation of the measured push force
13: mechanical impedance at 10 Hz
14: phase angle at 10 Hz
15: mechanical impedance at 15 Hz
16: phase angle at 15 Hz
13:2:209 mechanical impedance between 10-500 Hz in 5 Hz steps
14:2:210 phase angle of the mechanical impedance between 10-500 Hz in 5 Hz steps
3) The VPAmatrix.mat is according to resultsMatrix.mat, instead of the mechanical impedance in positions 13:2:209 the vibration power absorption values are listed. Here, only the direction of excitation is evaluated.
4) Raw data, the data name consists of the time stamp and is named afterwards in the same order as the matrix: Px, where x is the number of the subject, followed by the push and then the grip force and the position in the matrix. In each struct the metadata, the time and the signals are saved. The excitation in the subject study was applied around the palm (xh according to DIN5349:2001). Therefore, the angular_acceleration_x is already calculated from the recorded accelerometer signals ax_top and ax_bottom (the acceleration at the top and bottom of the measuring handle) in excitation direction. Torque_around_x is the torque resulting from the force sensor signals Fx_top and Fx_bottom around the direction of excitation. Torque_around_x and the angular_acceleration_x are used to calculate the mechanical impedance and vibration power absorption around the excitation direction (dimension 1 in the resultsMatrix.mat file). The signals used for the second dimension of the resultsMatrix are Torque_around_z (resulting from Fz_top, Fz_bottom) and angular_acceleration_x. The exact calculation of the cross axis mechanical imepdance can be found under DOI 10.51202/9783181024508-83. The raw data includes the measurements of 16 levels of grip and push force combinations with three repetitions for each subject, as well as additionally measured validation data at random intermediate force levels.
5) emptyMeasurement.mat is a measurement of the unloaded handle while excited with the same signal as in the subject study. This file can be used for the calibration of the handle.