A.V. Tkachenko - Ph. D. (Eng.), Associate Professor, Southwest State University (Kursk). E-mail: tkachenko46@list.ru K.A. Tkachenko - Post-graduate Student, Southwest State University (Kursk). E-mail: kirill06@mail.ru Y.A. Halin - Ph. D. (Eng.), Senior Lecturer, Southwest State University (Kursk). E-mail: yur-khalin@yandex.ru