Pose calibration method and device for wind tunnel test attack angle-double rotating shaft mechanism

Abstract

The invention relates to a pose calibration method and equipment for an attack angle-double-rotating-shaft mechanism in a wind tunnel test, and aims at the attack angle-double-rotating-shaft mechanism in the wind tunnel test to establish a relationship between a tail shaft attitude angle and each rotating shaft rotation value, thereby obtaining an undetermined error parameter in the attack angle-double-rotating-shaft mechanism. The method comprises the following steps: firstly, determining an inverse solution motion mathematical model of an attack angle-double-rotating-shaft mechanism according to theoretical derivation, then setting initial zero values of rotating values of three rotating shafts, then measuring attitude angles in a calibration attitude angle sequence by using an ROMER absolute measuring machine, and obtaining undetermined error parameters in a parameterized model by adopting a nonlinear least square method, so as to determine the attitude angle of the attack angle-double-rotating-shaft mechanism. The attitude angle calibration work of the attack angle-double-rotating-shaft mechanism is realized; the method is suitable for attitude calibration of the attack angle-double-rotating-shaft mechanism, and the attitude positioning accuracy is high.

Description

technical field [0001] The invention relates to an attitude calibration method and electronic equipment for a wind tunnel test angle of attack-double-rotation shaft mechanism, which acquires undetermined error parameters of the angle-of-attack-double-rotation shaft mechanism to achieve the purpose of accurately controlling the attitude of a wind tunnel model, and belongs to the wind tunnel test Technology, kinematic mechanism technology field. Background technique [0002] Wind tunnel test is the main means of aerodynamic research. During wind tunnel test, the model is installed in the wind tunnel test section through the support system. The model support has two functions: one is to support the model for the blowing test; the other is to change the attitude of the model, such as the angle of attack α, the angle of sideslip β and the angle of roll γ. The commonly used model support forms in high-speed wind tunnels include tail support, side support, belly support, back supp...

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Problems solved by technology

[0005] If the self-calibration method is used for the angle of attack-dual-axis mechanism in the wind tunnel test, the built-in sensor will increase the blockage of the mechanism, and the built-in sensor is easily damaged during the test

And the existing technology calibrates the respective attitude angles. Since the respective attitude angles are not independently realized by the movement of a single rotating shaft, but are realized by coupling the movements of three rotating shafts, it is difficult to calibrate the individual attitude angles one by one to avoid the improvement of the accuracy of one attitude angle while the other The accuracy of the attitude angle decreases, so it is inevitable that the positioning error of some attitude angles is too large

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