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Aircraft modeling method based on maximum information-reliability online 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: 2013-01-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 information amount-credibility online identification criterion

Method used

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Embodiment Construction

[0036] The specific steps of the aircraft modeling method based on the maximum information amount-credibility online identification criterion of the present invention are as follows:

[0037] 1. The commonly used candidate model forms for many aircraft when the angle of attack is less than 60 degrees are:

[0038] 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-reliability online identification criterion. The technical problems that the proving correctness of aerodynamic models and parameters verified by a flight test is poor caused by a simplified model identification criterion are solved. The technical scheme includes that data lengths are considered and reliable parameters are introduced in a maximum information criterion, an online modeling criterion is corrected, the division of U-D of Rj and Rj+1 is evaluated for the measurement variance, and a scalar online model selection and verified discriminant is obtained. The method has the advantages that aerodynamic models and moment models of an aircraft can be established on line directly in accordance with flight test data, and the technical problems of aircraft high attack angle model establishment and verification according to flight tests caused by a simplified model determination criterion are solved.

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-credibility 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 ...

Claims

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Application Information

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IPC IPC(8): G05D1/10
Inventor 史忠科
Owner NORTHWESTERN POLYTECHNICAL UNIV
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