Comparison Analysis of Different Time-Scale Heart Rate Variability Signals for Mental Workload Assessment in Human-Robot Interaction

Algorithm 1

Mental workload assessment preparation.

Input:ECG signals for each subject.

Output:Multiple time-scale HRV signals for all subjects.

1: For each such that do

2:  Q wave, R wave, and S wave of ECG signals are detected.

3:  RR internal sequence is obtained.

4:  Abnormal points in the output RR internal sequence are removed by median filtering.

5:  HRV signals are obtained.

6: End for

7: For each such that do

8:  Segment the signals into 1 min, 3 min, and 5 min time-scale segments defined as

9:  , , and , respectively.

10: End for