Identification of Upper-Limb Movements Based on Muscle Shape Change Signals for Human-Robot Interaction

Table 1

The mathematical expressions of the six features.

Serial number	Feature name	Abbreviation	Mathematical expression
1	Mean value	MVAL
2	Root mean square	RMS
3	Third moment	TM3
4	Simple square integral	SSI
5	Logarithm	LOGD
6	Standard deviation	STD