A.D. Filinskikh - Ph.D. (Eng.), Associate Professor, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: alexfil@yandex.ru I.N. Merzlyakov - Ph.D. (Eng.), Associate Professor, Head of Department, Nizhny Novgorod State Technical University n.a. R. E. Alekseev. E-mail: inmerzliakov@gmail.com