High-sensitivity rod type six-component wind tunnel test balance inlaid with different materials

Abstract

The invention discloses a high-sensitivity rod type six-component wind tunnel test balance inlaid with different materials, and relates to the technical field of force and moment measurement equipment, and the balance is characterized in that inlaid moment element structures are installed at the two sides of a balance main body structure in an inlaid installation mode, and the inlaid moment element structures are made of materials different from the balance main body structure; and the embedded torque element structure realizes high-sensitivity measurement of the rolling torque. According to the invention, the embedded torque element structure made of another material is embedded on the balance main body structure, so that the contradiction between the overall strength and rigidity of the balance element and the sensitivity of the rolling torque element is solved, and accurate test measurement of great difference between aerodynamic force and torque load values of an aircraft is realized; accuracy, safety and reliability of wind tunnel test data of a micro rolling moment aircraft are greatly improved, and the method can be applied to measurement of aerodynamic force and moment of aircrafts with similar aerodynamic loads and different layouts.

Description

technical field [0001] The invention belongs to the technical field of multi-component aerodynamic load measuring sensors and force and moment measuring equipment. More specifically, the invention relates to a high-sensitivity rod-type six-component wind tunnel test balance inlaid with different materials. Background technique [0002] The wind tunnel strain balance is not only an elastic element for measuring aerodynamic loads, but also a stressed part for bearing aerodynamic loads. At present, in the field of wind tunnel test balance technology for multi-component aerodynamic load measurement, the same material is used to expand the design. In terms of material selection, strain balance materials generally use high-strength low-carbon alloy steel, mainly high-quality chromium-manganese-silicon alloy steel, precipitation hardening stainless steel, and maraging steel. Among the above materials, maraging steel is the most widely used due to its own material characteristics. ...

AI Technical Summary

Problems solved by technology

For the existing small rolling moment Mx As far as the six-component internal strain balance is concerned, the rolling moment measurement range is about 0.2N m, which cannot meet the aerodynamic measurement requirements of some special aircraft. The main reason for this problem is Mx Due to the small measuring load Mx The contradiction between the small size of the measuring beam and the high rigidity of the balance directly leads to problems such as "jitter" and "assembly" of the model in the wind tunnel test

In recent years, as an emerging technical means, the air bearing balance can solve the technical problem of "accurate measurement of micro-rolling moment" to a certain extent, but the complexity of the key component air bearing structure and its own characteristics determine the design stage and the complexity of the work in the calibration stage, so its specific operability needs to be improved

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