A Method for Evaluating the Aerodynamic Deviation of UAV Manufactured Shapes

Abstract

A method for evaluation of the pneumatic deviation of the manufactured outline of an unmanned aerial vehicle comprises the following steps that (1) firstly through combination of wind tunnel test data according to the theoretical outline of the unmanned aerial vehicle, according to the curvature tolerance of pneumatic data and the wind tunnel test data which are obtained by means of the method that the unmanned aerial vehicle theory is subjected to CFD calculation, a CFD calculation method suitable for the theoretical outline of the unmanned aerial vehicle is finally determined, and secondly according to the manufactured outline of the unmanned aerial vehicle, the point cloud data of the manufactured outline of the unmanned aerial vehicle are obtained, so that reverse modeling is conducted, and a three-dimensional model is obtained; (2) the theoretical outline of the unmanned aerial vehicle and the three-dimensional model are subjected to deviation statistics, and geometric deviation value distribution of the theoretical outline of the unmanned aerial vehicle and the three-dimensional model is obtained, the obtained three-dimensional model is calculated through the determined CFD calculation method, and the pneumatic data of the manufactured outline are obtained; and (3) according to the pneumatic data obtained through CFD calculation of the manufactured outline and the theoretical outline, the pneumatic deviation of the unmanned aerial vehicle is compared, if the pneumatic data are deviated within a preset range, the manufactured outline of the unmanned aerial vehicle meets the requirement, and otherwise, the fact that the pneumatic deviation exists in the manufactured outline of the unmanned aerial vehicle is affirmed.

Description

technical field [0001] The invention relates to a method for evaluating the aerodynamic deviation of the manufacturing shape of an unmanned aerial vehicle, which belongs to the application field of computational fluid dynamics in aviation vehicles. Background technique [0002] The aerodynamic shape plays a vital role for the UAV, which provides the lift force and the moment balance of the flight attitude required for the UAV to fly. The aerodynamic shape of the UAV is determined according to the design point of its mission profile. If its shape changes, especially the shape of the lifting surface of the wing, tail (or canard), the performance index of the UAV will be slightly affected. and flight quality, and more importantly, affect flight safety. However, in the process of aircraft manufacturing, errors and deviations will inevitably occur in shape processing. Therefore, it is necessary to inspect and accept the processed shape, and evaluate the influence of manufacturin...

AI Technical Summary

Problems solved by technology

This will increase the test flight cost of the UAV, and serious aerodynamic deviation may even cause flight safety

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