D.V. Bokhovkin1, Yu.Yu. Korobkov2, O.A. Yangovatova4

1,2,4 JSC “CNIRTI named after academician A.I. Berg” (Moscow, Russia)

3 FSUE “VNII” (Moscow, Russia)

1 bokhovkin@yandex.ru; 2 jura9891@gmail.com; 3 yangovatova@mail.ru