R.B. Rashevskiy - Student, Department of Automation and Telemechanics, Perm National Research Polytechnic University. E-mail: roman@rashevskiy.com A.S. Shaburov - Ph.D. (Eng.), Associate Professor, Department of Automation and Telemechanics, Perm National Research Polytechnic University. E-mail: shans@ at.pstu.ru