S.M. Zhdanov - Dr. Sc. (Eng.), Professor, Kaluga branch of the Bauman MSTU. E-mail: fn2kf@list.ru V.V. Prasitsky - Dr. Sc. (Eng.), Professor, Kaluga branch of the Bauman MSTU. E-mail: sintel40@yandex.ru G.V. Prasitsky - Student, Kaluga branch of the Bauman MSTU. E-mail: akatosh74@yandex.ru N.S. Sapronova - Engineer, Kaluga branch of the Bauman MSTU. E-mail: fn2kf@list.ru