A.P. Korzhavyi - Dr. Sc. (Eng.), Professor, Kaluga branch of the Bauman MSTU. E-mail: fn2kf@list.ru V.V. Maximov - Senior Lecturer, Kaluga branch of the Bauman MSTU. E-mail: fn2kf@list.ru V.O. Fedorov - Ph. D. (Eng.), Associate Professor, Kaluga branch of the Bauman MSTU. E-mail: wquolz@mail.ru