A system and method for processing wind tunnel test data of dynamic force measurement of rotating aircraft

Abstract

The invention provides a method and a system for processing the data of a dynamic force measuring wind tunnel test of a rotary aircraft. Including: output induction signals through the sensor group; output dynamic signals through the data collector; calculate the angle of attack and roll angle of the model and segment the dynamic signals; obtain the cut-off frequency of the low-pass filter through frequency spectrum analysis, and design the low-pass filter; obtain the elastic deformation Correct the elastic deformation of the strut; calculate the aerodynamic coefficient of the no-load state and test angle of attack; obtain the dynamic aerodynamic coefficient of each test angle of attack corresponding to each roll angle; correct the dynamic aerodynamic coefficient of each test angle of attack and obtain the available dynamic aerodynamic coefficient; Calculate the average value of the dynamic aerodynamic coefficient as the time-averaged aerodynamic characteristics of the aircraft. The method for processing the data of the dynamic dynamometric wind tunnel test of the rotary aircraft improves the problem in the prior art that the original signal of the dynamic dynamometric wind tunnel test cannot be analyzed and processed to the dynamic aerodynamic coefficient of the aircraft.

Description

technical field [0001] The invention relates to the technical field of wind tunnel test data processing, in particular to a system and method for processing wind tunnel test data for dynamic force measurement of a rotating aircraft. Background technique [0002] In the wind tunnel, the force measurement test of the rotating model is carried out. Usually, the model is rotated during the test by free rotation, forced rotation of the motor or turbine, etc., and the balance collects multiple data at each angle of attack according to the method of conventional force measurement test. , generally 30 to 50 times, the collector performs low-pass filtering processing and then performs algebraic averaging processing, which is directly used as the aerodynamic load of the aircraft at this angle of attack. Aerodynamic characteristics. [0003] On the one hand, this test method cannot guarantee that enough data points at different roll attitude angles can be collected in the test because...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a system and method for processing dynamic dynamometric wind tunnel test data of a rotary aircraft, which can solve the problem of the inability to analyze and process the dynamic dynamometric wind tunnel test from the original signal to the dynamic aerodynamic coefficient of the aircraft in the prior art The problem

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