L.M. Smirnova - Dr. Sc. (Eng.), Professor, Department of Biotechnical Systems, Saint-Petersburg Electrotechnical University «LETI»; Leading Research Scientist, Department of the Biomechanical Research of Musculoskeletal System, Federal State Institution «Saint Petersburg State Scientific and Practical Center of Medical and Social Expertise, Prosthetics and Rehabilitation named after G.A. Altbrecht» of the Ministry of Labor and Social protection of Russian Federation E-mail: info@diaserv.ru