MONITORING OF AN OPERATORS VIGILANCE LEVEL BY SKIN RESISTANCE RESPONSE

Perception of relevant information by an operator is accompanied by hi s skin resistance response (SRR). By experiment a threshold of the SRR interimpulse interval was found, at the excess of which an operator's functional state is interpreted as ''loss of vigilance''. Using this knowledge an algorithm has been developed for control (self-regulation ) of a ''man-machine'' system operator's vigilance level during the ex ecution of activity, and based on a method using visual and sound biof eedback from the SRR interimpulse interval parameters. Depending on th e current values of the SRR interimpulse interval static or dynamic vi sual biofeedback is used When the SRR interimpulse interval exceeds th e threshold value, dynamic visual and sound biofeedback are simultaneo usly used. Simultaneously it is a command to the operator to execute t he test algorithm with a limited execution time. If this algorithm has not been executed, or has been executed with an error, or if some pre -set time is exceeded, the ''man-machine'' system is switched to the e mergency operating mode.