Dilemma and Solution of Traditional Feature Extraction Methods Based on Inertial Sensors

Table 1

Custom features.

Feature name	Description
End velocity along X	End speed along the x-axis
End velocity along Y	End speed along the y-axis
End velocity along Z	End speed along the z-axis
Starting velocity along X	Starting speed along the x-axis
Starting velocity along Y	Starting speed along the y-axis
Starting velocity along Z	Starting speed along the z-axis
Displacement along X	Displacement along the x-axis
Displacement along Y	Displacement along the y-axis
Displacement along Z	Displacement along the z-axis
Velocity plus acceleration along X	if the product of along the x-axis and a is positive, otherwise
Velocity plus acceleration along Y	if the product of along the y-axis and a is positive, otherwise
Velocity plus acceleration along Z	if the product of along the z-axis and a is positive, otherwise