L.S. Beckel – Assistant, Kaluga branch of the Bauman MSTU

E-mail: milla2606@rambler.ru

V.D. Shhkilev – Ph.D.(Eng.), Associate Professor, Kaluga branch of the Bauman MSTU

E-mail: vladimir-shkilev@mail.ru

A.P. Korzhavyi – Dr.Sc.(Eng.), Professor, Kaluga branch of the Bauman MSTU E-mail: fn2kf@list.ru