An atmosphere data ground testing system

Abstract

The invention provides an atmosphere data ground testing system. The invention aims to provide a testing system which can test the dynamic characteristics of optical atmosphere speed sensors in a ground environment and has low requirements for environments. The technical solution of the invention is characterized in that an atmosphere data computer, a GPS / Beidou resolver and an inertial navigationapparatus are integrated in a case; a combined wind speed measurement apparatus measures the wind speed and direction of relative airflow in the horizontal direction and the vertical direction at measurement points to provide benchmark data of the true airspeed, angle of attack and angle of sideslip for an optical atmosphere speed sensor; a rotating platform changes the included angle between theoptical atmosphere speed sensor and the relative airflow by rotating a stipulated angle; the optical atmosphere speed sensor makes emitted laser beams converge at a focus, and the projection speed ofthe macroscopic atmosphere relative movement speed Vc in the axis direction of each laser beam at the focus is detected according to the principle of laser scattering; the projection speeds of more than three different directions are combined to obtain testing data.

Description

technical field [0001] The invention relates to an atmospheric data ground testing system for atmospheric data ground testing, in particular to an optical atmospheric data ground testing system for performing dynamic characteristic tests on an optical atmospheric velocity sensor in a surface environment. Background technique [0002] Atmospheric data such as the airspeed, angle of attack, and sideslip angle of the aircraft are very important parameters for the pilot, the flight control system, and the avionics system. Airspeed measurement works on the basis of Bernoulli's law that the sum of the static and dynamic pressures of a fluid, the total pressure, is a constant value. During the flight of the aircraft, the atmosphere moves at a high speed relative to the aircraft, and the high-speed airflow acts on the pitot tube, which makes it measure the stagnation point pressure, that is, the total pressure, under the action of stagnation. Pitots measure static pressure as well ...

AI Technical Summary

Problems solved by technology

For the above reasons, there is an unstable airflow near the movable carrier 4, and the combined wind speed measuring device 13 is an immersion sensor, which requires direct contact with the airflow measurement, and the unstable airflow will cause the vector at the measurement point measured by the combined wind speed measuring device 13 There is a large deviation between the wind speed 6 and the macro-atmospheric relative motion speed Vc7

And in the case that the moving speed of the movable carrier 4 is constant, the vector wind speed 6 at the measurement point measured by the combined wind speed measuring device 13 may be unstable

However, the optical atmospheric velocity sensor 5 belongs to remote sensing measurement, and the measurement point 52 is far away from the unstable airflow environment, which leads to the fact that the objects measured by the optical atmospheric velocity sensor 5 and the combined wind velocity measuring device 13 may be inconsistent

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