Thrust balance multivariate calibration method capable of completely simulating test state

Abstract

The invention discloses a thrust balance multivariate calibration method capable of completely simulating a test state. The method comprises the following steps: acquiring six component bridge signal output values of a thrust balance, a balance body temperature value and a balance internal pressure value in real time; and substituting the values acquired in real time into a pre-established thrust balance calibration formula, and calculating and obtaining corresponding three force loads and three moment loads, wherein the thrust balance calibration formula is a relational expression between each component bridge signal of the thrust balance and three forces, three moments, one pressure and one temperature applied to the thrust balance, and totally comprises 62 coefficients. According to the method, the loaded condition of the thrust balance in the test process can be completely simulated in the calibration stage, so that the calibration state is completely consistent with the actual use state, the measurement error caused by incomplete or inconsistent simulation calibration elements is avoided, the fine measurement level of the balance of the type is improved, and the data quality of the wind tunnel test can be greatly improved.

Description

technical field [0001] The invention relates to the field of thrust vector wind tunnel tests, in particular to a thrust balance multi-element calibration method that fully simulates test states. Background technique [0002] During the thrust vector wind tunnel test, the thrust balance is subjected to aerodynamic loads, temperature loads and pressure loads. Accurate measurement of aerodynamic loads is the purpose of the wind tunnel test, while temperature loads and pressure loads are additional additional components for the purpose of jet flow testing. If the working formula of a thrust balance does not include pressure and temperature parameters, then these two loads cannot be corrected, and their existence will seriously affect the accurate measurement of aerodynamic loads. In current thrust vectoring wind tunnel tests, the working formulas of most thrust balances only contain 3 forces and 3 moments, a total of 6 parameters and 27 coefficients. Through this balance formula...

AI Technical Summary

Problems solved by technology

If multivariate calibration with temperature, pressure and force (moment) loads is implemented on the thrust balance, the thrust balance will change from six components to eight components (considering temperature and pressure as the other two components of the balance), and the above two methods are used to generate loads The loading points of the load table will be more, which is not conducive to improving the research and development efficiency of the thrust balance

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