M.S. Baibakov - Student, Perm National Research Polytechnic University. E-mail: bajbakov.mc@gmail.com A.T. Kluchnikov - Ph.D. (Eng.), Associate Professor, Perm National Research Polytechnic University. E-mail: aklu2011@pstu.ru A.D. Korotaev - Ph.D. (Eng.), Associate Professor, Perm National Research Polytechnic University. E-mail: lis@pstu.ru S.V. Shutemov - Senior Lecturer, Perm National Research Polytechnic University. E-mail: shutemsv@yandex.ru