N.I. Pchelintseva - Ph. D. (Eng.), Associate Professor, Kaluga branch of the Bauman MSTU. E-mail: pchelintseva.n@yandex.ru A.S. Gordeev - Senior Lecturer, Kaluga branch of the Bauman MSTU. E-mail: tungsten-ali@mail.ru V.V. Maksimov - Senior Lecturer, Kaluga branch of the Bauman MSTU. E-mail: maksimov_w@mail.ru D.V. Zubkov - Student, Kaluga branch of the Bauman MSTU. E-mail: TDZ2011@yandex.ru