DETERMINATION OF THE CENTER OF GRAVITY OF AN UNMANNED AERIAL VEHICLE OF A TİLTROTOR TYPE

Abstract

The article analyzes research work in the direction of the correct location of the load center,
centering and gravity of the aircraft at the design and manufacturing stage in order to improve the
efficiency and safety of flights, as well as the characteristics of existing methods and means, and,
using the example of a tiltrotor unmanned aerial vehicle, a methodology for using the known the
"scale-graph" method, which is widely used in determining the center of gravity of an aircraft.
When determining the mass of the tiltrotor-type unmanned aerial vehicle designed and developed
by us and calculating the coordinates of the center of gravity, an analysis of the standard deviation
and probable error was carried out. The characteristics and possibilities of practical application
of mobile electronic scales as the main means of measuring the load of an unmanned aerial
vehicle in stationary conditions, as well as direct weighing, which makes it possible to determine
the center of gravity, are considered. A method developed for determining the center of gravity of
an aircraft with increased accuracy is described, and a model for constructing the proposed
system is presented. The results of theoretical and experimental studies carried out to determine the mass and center of gravity of an unmanned aerial vehicle are analyzed. To do this, in
accordance with the methodology, the plane of the laboratory table was brought to a
horizontal position with a level gauge and the measurement errors of digital measuring
scales were checked according to the results of measuring the reference load. The
measurements were repeated by changing the position of the scales clockwise. According to
the measurement results, since the center of gravity of the aircraft was taken differently on
both axes, and the intermediate point fell outside the central axis (to the right or left, front to
back), repeated measurements were taken by shifting the load in the appropriate direction to
ensure centering during measurements. According to the final results, center of gravity
diagrams were constructed based on the calculated values of the coordinates of the points of
intersection of the diagonals and random slope values were determined. Based on the
diagrams constructed using the program, the final graph was obtained with the root-meansquare
error of the deviation of the aircraft from the axis of symmetry, equal to σ=0.047 sm