Aerodynamic force multi-source data fusion and identification method, system and medium

Abstract

The invention provides an aerodynamic force multi-source data fusion and identification method and system and a medium. The method comprises the following steps: 1, building a globally related aerodynamic force mathematical model; 2, according to the existing calculation data, the wind tunnel test data and the flight test data, calculating standard deviations of multiple source data; 3, establishing an overdetermined equation set by taking existing calculation data, wind tunnel test data and flight test data as data samples of the aerodynamic mathematical model; and step 4, solving the overdetermined equation set by adopting a weighted least square method, obtaining the weight by calculating the standard deviation, solving the coefficient in the aerodynamic mathematical model, and completing the establishment of the multi-source data fusion aerodynamic mathematical model. According to the invention, the problems of different reliability of data from different sources and error decomposition to sample points in aerodynamic mathematical model identification and correction are solved, an overdetermined equation set can be comprehensively solved from data from three sources of calculation, a wind tunnel test and a flight test, and identification and model correction are completed in one step.

Description

technical field [0001] The present invention relates to the technical field of aerodynamic design, in particular to an aerodynamic multi-source data fusion and identification method, system and medium. Background technique [0002] With the increase of the complexity of the shape of the aircraft and the expansion of the flight envelope, it is difficult to scientifically balance the different reliability of data from different sources by following the traditional piecewise function as the modeling method of the aerodynamic mathematical model; Decomposing the data error of the model sample point into the sample point, there is a decomposition problem, and the Bayesian method often used is considered to be not scientific enough. A large number of engineers have made persistent efforts and development of the modeling method of the aerodynamic mathematical model in order to form a modeling method of the aerodynamic mathematical model in the form of a continuous function. [0003...

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Problems solved by technology

[0002] With the increase of aircraft shape complexity and the expansion of flight envelope, following the traditional piecewise function as the modeling method of aerodynamic mathematical model, it is difficult to scientifically balance the different reliability of data from different sources; Decomposing the data error of the model sample point into the sample point, there is a decomposition problem, and the Bayesian method often used is considered to be not scientific enough

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