Test and measurement method and device for aerodynamic and dynamic characteristics of vehicle-mounted small UAV

Abstract

The invention relates to a vehicle-mounted aerodynamic force and power characteristic test-measurement method and device of a small UAV. A three-foot support (2) is fixed on a wheeled trolley (1), and can move on a vehicle (16) and be locked; a primary support arm (4) is connected to the three-foot support (2) via a primary mechanical holder (3); the primary mechanical holder (3) can adjust the azimuth and pitch angle manually and be locked; a secondary support arm (7) is connected to the front end of the primary support arm (4) via a secondary mechanical holder (6); a balance pole (12) is connected to the front end of the secondary support arm (7) via a universal joint (11); a pitot (15) with a weathercock is arranged on the measured UAV; and tension wires (17) are used to tension the primary mechanical holder (3) and the secondary mechanical holder (6) are tensioned relative to the vehicle (16) to help fix the test-measurement device firmly. According to the invention, the small UAV is tested and measured directly, the test cost is low, the test period is shortened, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aerodynamic testing of small unmanned aerial vehicles. Background technique [0002] The experimental measurement of aerodynamic and dynamic characteristics is the basic work of UAV research and development, and provides experimental data for overall scheme design, aerodynamic layout selection, flight performance optimization and automatic flight control. [0003] Traditionally, the aerodynamic characteristic test measurement and the dynamic characteristic test measurement are carried out separately. The aerodynamic characteristic test measures the moving airflow generated by the wind tunnel and makes it flow around the test model. By measuring the force of the test model, the aerodynamic lift, drag, side force and rolling moment, pitching moment, and yaw moment data can be obtained . However, the wind tunnel test measurement is in the charge of a special unit, and it is necessary to design and manufact...

AI Technical Summary

Problems solved by technology

However, the wind tunnel test measurement is in the charge of a special unit, and it is necessary to design and manufacture a special test model according to the size requirements of the wind tunnel. There are many constraints, a long preparation period, and high test costs. For the development of small UAVs that require flexible, fast, and low-cost implementation not applicable

Small UAVs mostly use propeller power, and their dynamic characteristics vary with the incoming flow speed and working height. The test and measurement of dynamic characteristics requires wind tunnel tests for propeller characteristics, high-altitude table tests for engine characteristics, and propeller-engine matching tests, which also face many constraints and cycle time. Long and costly problems

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