A.V. Rashich – Ph.D.(Eng.), Associate Professor, Peter The Great St. Petersburg Polytechnic University

E-mail: andrey.rashich@gmail.com

S.V. Gorbunov – Post-graduate Student, Peter The Great St. Petersburg Polytechnic University E-mail: serggv91@gmail.com

A.S. Urvantsev – Engineer, Peter The Great St. Petersburg Polytechnic University E-mail: urvantsev_as@spbstu.ru