I.V. Chukhraev - Ph. D. (Eng.), Associate Professor, Kaluga branch of the Bauman MSTU. E-mail: igor.chukhraev@mail.ru V.E. Drach - Ph. D. (Eng.), Associate Professor, Kaluga branch of the Bauman MSTU. E-mail: drach@kaluga.org

V.N. Klyachkin - Dr. Sc. (Eng.), Professor, Department «Applied Mathematics and Informatics», Ulyanovsk State Technical University E-mail: v_kl@mail.ru E.A. Zentsova - Post-graduate Student, Department «Applied Mathematics and Informatics», Ulyanovsk State Technical University E-mail: e_zentsova@mail.ru