Aircraft modeling method based on variable measurement number maximum information criterion

Abstract

The invention discloses an aircraft modeling method based on a variable measurement number maximum information criterion. The aircraft modeling method is used for solving the technical problems of poor proving correctness of pneumatic models and parameters provided by flight tests due to the maximum information criterion when observation vectors of existing different flight tests are not the same. The technical scheme includes that during aircraft model modeling and model validation, different flight test factor amendment modeling and model validation criteria of an aircraft are acquired by analyzing the influence of different observation vectors to the maximum information content criterion, and scalar model selection and testing discriminant is acquired through U-D decomposition of measurement variance estimation Rj and Rj+1. By the method, aerodynamic force models and moment models of the aircraft can be established directly conveniently according to flight test data, the technical problem that the aerodynamic force models are established and tested incorrectly according to different flight test data due to the fact that influence of different observations to the maximum information criterion is not considered directly.

Description

technical field [0001] The invention relates to an aircraft modeling method, in particular to an aircraft modeling method based on the maximum information quantity criterion of variable measurement numbers. Background technique [0002] According to the aircraft aerodynamic model and parameters, it can not only determine the handling stability of the aircraft, but also provide the correct mathematical model for ground and air simulators; verify the wind tunnel experiments and theoretical calculation results of aircraft aerodynamic parameters; provide support for the design and improvement of aircraft control systems Provide basic data; identify the flight quality of finalized aircraft; study the flight quality of high-performance aircraft; conduct accident analysis of aircraft crashes, etc.; the problem of accurately establishing a mathematical model of an aircraft is completely different from the theoretical method of modeling through basic laws, theorems, etc. , the model ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing different flight test observation vectors when the maximum information content criterion leads to poor correctness of the aerodynamic model and parameter verification given by the flight test, the present invention provides an aircraft modeling based on the variable measurement number maximum information content criterion method

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