Stand for studying the change in the rotor noise of an unmanned aerial vehicle from the rotational speed by sound impact on the system of sound wave receivers

摘要

The utility model relates to acoustics, in particular, to the study of sound vibrations arising during the operation of the propeller-driven group, and can be used, for example, in the design of a UAV propeller with improved sound and thrust characteristics.;The stand for investigating the change in the noise of the UAV propeller from the rotational speed contains a fixed platform 1 with an installed platform 2, on which an electric motor 3 is installed, and the fixed base 1 is connected to the platform 2 by electronic means for determining the thrust 8. The electric motor 3, installed on the platform 2, is connected to the controller of the electric motor 4, to which the speed controller of the electric motor 5 and the power source are connected 6. A screw 7 is installed on the shaft of the electric motor 3. A system of receivers of sound waves is connected to the fixed base 1, the receivers of sound waves 9 are located on rigid linear bases. One receiver is located on one linear base. Linear bases are attached to a fixed base 1 so that equal angles are maintained between two adjacent linear bases. Microphones or sound level meters are used as sound receivers 9 fixed on a linear base, and fixed mounts for sound receivers are provided on linear bases. At least three sound receivers are used, thus, sound receivers located on linear bases are evenly spaced in a circle around the propeller group.;The test bench solves the problem associated with the need to determine the noise produced by the propeller and to assess the efficiency of the propeller-driven groups with a simultaneous increase in the reliability of the results obtained. The test bench allows you to determine the thrust produced by the propeller group and the noise generated in the operating mode, to form a database of indicators of the generated thrust and the noise produced to compare the characteristics of different propeller models and the efficiency of different propeller groups.;The technical result achieved with the claimed device for measuring the noise generated by the propeller-driven group consists in the possibility of evaluating propellers for unmanned aerial vehicles by such indicators as the thrust force and noise generated during operation, thus making comparative tests of propellers with different geometries to assess their characteristics ...;The implementation of the claimed method and device for studying the sound vibrations arising during the operation of the propeller-driven group confirms the differences in the characteristics of the thrust and the noise produced in the operating mode of the propeller-engine groups, which makes it possible to determine the propellers with the best characteristics of the thrust and the noise produced. 1 ill.