A.A. Anisimov Post-graduate Student, Assistant, Department of Biotechnical Systems, Saint Petersburg Electrotechnical University «LETI» E-mail: aaanisimov@etu.ru Z.M. Yuldashev Dr.Sc. (Eng.), Professor, Head of Department of Biotechnical Systems, Saint Petersburg Electrotechnical University «LETI» E-mail: yuld@mail.ru