Simple loading calibration device for aerodynamic force measurement balance

Abstract

The invention discloses a simple loading calibration device for an aerodynamic force measurement balance. The device comprises a base, a support rod, a clamping block, a loading sleeve and a core holder; after the whole device is assembled, different faces of the base are fixed to an optical table through screws, weights are loaded on corresponding mount points on the loading sleeve, and the function of conducting quantitative loading of axial force, normal force, yawing force, rolling moment and yawing moment on the balance is achieved. Accordingly, by designing the simple rod type strain balance loading calibration device, simple calibration work of the balance in the patching link is achieved, all strain bridge forms of the balance can be loaded effectively to inspect the patching quality, the balance patching efficiency is greatly improved, and then support is provided for carrying out an wind tunnel experiment as planned.

Description

technical field [0001] The invention belongs to the field of instrument calibration, and in particular relates to a loading device for calibrating an aerodynamic measuring balance. Background technique [0002] Wind tunnel experiments are an important means to study the aerodynamic loads on aircraft or other moving objects. The aerodynamic measuring balance (balance for short) is the core measuring instrument for measuring the aerodynamic load on the model in the experiment. With the help of a balance, we can obtain the magnitude, direction and point of action of the force and moment acting on the test model, and its performance indicators directly affect the accuracy of the force test data. As a measuring instrument, a balance needs to be calibrated before use to obtain performance indicators such as balance formula and accuracy. At present, due to the different quantities, types and measuring ranges of the measured aerodynamic load components, as well as the differences ...

AI Technical Summary

Problems solved by technology

[0003] At present, the simple calibration work of the balance is generally performed by the balance calibration stand, but due to the highly customized characteristics of the balance and the complexity and precision of the balance calibration work, the mechanical structure of the balance calibration stand is complex, precise, and huge, and its electrical system also has same features

This leads to a large area of ​​the balance calibration stand, high cost, poor versatility, and poor mobility. Moreover, with the rapid development of my country's aerospace industry, the number of wind tunnel experiment projects has increased year by year, and the number of balances that need to be formally calibrated has also shown a sharp increase. Trend, the easy calibration of balances often has to give way

This seriously affects the progress of the balance patch, which in turn affects the progress of the wind tunnel experiment, creating a vicious circle

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