System and method for processing dynamic force measurement wind tunnel test data of rotary aircraft

Abstract

The invention provides a method and a system for processing dynamic force measurement wind tunnel test data of a rotary aircraft. The method comprises: outputting an induction signal through a sensorgroup; outputting a dynamic signal through a data collector; calculating a model attack angle and a roll angle and segmenting a dynamic signal; obtaining a low-pass filtering cut-off frequency throughspectrum law analysis, and designing a low-pass filter; obtaining an elastic deformation amount to correct elastic deformation of the strut; calculating aerodynamic coefficients of the no-load stateand the test attack angle; obtaining a dynamic aerodynamic coefficient of each test attack angle corresponding to each roll angle; correcting the dynamic aerodynamic coefficient under each test attackangle and obtaining an available dynamic aerodynamic coefficient; and calculating the average value of the dynamic aerodynamic coefficients as the time-average aerodynamic characteristics of the aircraft. The method for processing dynamic force measurement wind tunnel test data of the rotary aircraft improves the problem that the dynamic aerodynamic coefficient from the original signal of the dynamic force measurement wind tunnel test to the aircraft cannot be analyzed and processed in the prior art.

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 of dynamic force measurement of a rotary aircraft. Background technique [0002] Carry out a rotating model dynamometer test in a wind tunnel, usually through free rotation, motor or turbine forced rotation, etc. to make the model rotate during the test, and the balance collects multiple data at each angle of attack according to the conventional dynamometric test method , generally 30 to 50 times, the collector performs low-pass filtering and then performs algebraic average processing, which is directly used as the aerodynamic load of the aircraft under this angle of attack. aerodynamic properties. [0003] On the one hand, due to the lack of sample data, this test method cannot guarantee that enough data points under different roll attitude angles can be collected in the test. The collected balanc...

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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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