I.E. Zhigalov - Dr.Sc.(Eng.), Professor, Vladimir State University named after A.&N. Stoletovs. E-mail: ikgij@vlsu.ru M.I.Ozerova - Ph.D.(Eng.), Vladimir State University named after A.&N. Stoletovs. E-mail: ozerovam@rambler.ru I.A.Novikov - Post-graduate student, Vladimir State University named after A.&N. Stoletovs. E-mail: anvi.x11@gmail.com