V.V. Vitko¹, A.A. Nikitin², V.O. Stoyakina³, A.A. Emelyanov⁴, A.B. Ustinov⁵

¹‧²‧⁵Saint Petersburg Electrotechnical University (Saint Petersburg, Russia)

³‧⁴JSC "KNIRTI" (Zhukov of Kaluga Region, Russia)

¹vitaliy.vitko@gmail.com, ²aanikitin@etu.com, ⁴nd1794@yandex.ru, ⁵ustinov_rus@yahoo.com