[Estimation of efficiency of fatigue monitoring devices considering the occurrence of the instability of nature of falling asleep errors].

One of the most frequent reasons of occurrence of errors at professional work performance is the critical decrease in the level of wakefulness of the operator. It is shown that the parity between the size of the decrease in the level of wakefulness and the probability of errors has a nonlinear character, and development of a drowsy condition can influence differently on various cognitive functions of the person. It means, that even at a small decrease in the level of wakefulness, there is a probability of occurrence of errors. For the control of the occurrence and prevention of dangerous conditions of the operator, the Fatigue monitoring devices are developed, but now they have the limited scope and efficiency. The new approach to a quantitative estimation of the efficiency of the monitoring systems of a functional is offered on condition of the person of the operator taking into account the instability of performance in the conditions of the critical decrease in the level of wakefulness.