DOI 10.51955/2312-1327_2025_2_ 

Vladimir A. Tselishchev

Abstract. The features of the development of domestic unmanned aerial vehicles are given. The main problems of the technological evolution of cargo quadrocopters have been revealed. The concept of the development of unmanned cargo multi-purpose multi-propeller flying aircraft is presented, reflecting the system of using a hydraulic transmission using the example of a quadcopter. The issues of accuracy, stability, controllability of the automatic control system and regulation of the hydraulic transmission of a cargo quadcopter are considered. A possible description of the hydraulic drive of the quadrocopter rotors as an object of regulation is presented. The forces acting on the quadcopter in flight have been determined. The controlling, disturbing and corrective effects on the automatic control and regulation system of the hydraulic transmission of the quadcopter are identified and described. The analysis of the possibility of using aircraft piston engines to drive the transmission of a cargo quadcopter, volumetric axial plunger pumps and hydraulic motors has been performed. New circuit solutions for hydromechanical devices for correcting static and dynamic characteristics are shown. Schematic solutions of hydraulic transmission regulators are presented: pressure regulator, dynamic pressure regulator, speed regulator, power regulator, LS regulator. The advantages of using regulators are described. The proposed hydro–mechanical controller with LS-regulation makes it possible to improve flight stability and energy efficiency of a multi-rotor aircraft.

Keywords: cargo quadcopter, hydraulic transmission, transmission control system, hydromechanical regulators of characteristics.

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