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Aircraft modeling method based on maximum information amount on-line identification criterion

A technology with the largest amount of information and modeling methods, applied in the field of aircraft modeling, can solve problems such as poor correctness of aerodynamic models and parameter verification

Inactive Publication Date: 2015-03-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing simplified model identification criteria that lead to poor correctness of the aerodynamic model and parameter verification given by the flight test, the present invention provides an aircraft modeling method based on the maximum amount of information online identification criteria

Method used

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  • Aircraft modeling method based on maximum information amount on-line identification criterion
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  • Aircraft modeling method based on maximum information amount on-line identification criterion

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Embodiment Construction

[0040] The specific steps of the aircraft modeling method based on the maximum amount of information online identification criterion of the present invention are as follows:

[0041] 1. The commonly used candidate model forms for many aircraft when the angle of attack is less than 60 degrees are:

[0042] x · ( t ) = Φ ( Ω 0 ) f 0 [ x ( t ) ] + θ 1 f 1 [ x ( t ) ] + . . . + θ q f q [ x ( ...

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Abstract

The invention discloses an aircraft modeling method based on a maximum information amount on-line identification criterion. The aircraft modeling method based on the maximum information amount on-line identification criterion is used for solving the technical problem that an existing simplified model identification criterion enables a pneumatic model and parameter calibration correctness given through flight test to be poor. The technical scheme is that the data length is considered and an on-line modeling criterion is revised according to the maximum information amount criterion; and an on-line model selecting and verifying discriminant is obtained through U-D disintegration of measurement variance estimates Rj and Pj+1. The aircraft modeling method facilitates on-line building of an aerodynamic force model and a force moment model of an aircraft according to flight test data directly, and solves the technical problem existing in building and verifying process of an aircraft high-incidence model according to a flight test.

Description

technical field [0001] The invention relates to an aircraft modeling method, in particular to an aircraft modeling method based on the maximum information amount online identification criterion. 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 is mainly es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/00
Inventor 史忠科
Owner NORTHWESTERN POLYTECHNICAL UNIV
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