TY JOUR TI CREATING A WORKING MODEL OF A DRIVERLESS AIRFIELD TOW TRUCK KW airfield driverless tow truck KW aerial vehicle KW traction calculation JO Bulletin of Bryansk state technical university AU D'yakov, D.E. AU Valiulin, I.A. AU Lihovidov, D.V. AU Velikanov, A.V. PY 2021 IS 2021 PB Bryansk State Technical University