Modeling method of aircraft based on maximum information quantity-reliability rule

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

Inactive Publication Date: 2013-01-09
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 maximum information criterion which leads to poor correctness of the aerodynamic model and par

Method used

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  • Modeling method of aircraft based on maximum information quantity-reliability rule
  • Modeling method of aircraft based on maximum information quantity-reliability rule
  • Modeling method of aircraft based on maximum information quantity-reliability rule

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Embodiment Construction

[0036] The specific steps of the aircraft modeling method based on the maximum amount of information-credibility 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 a modeling method of an aircraft based on a maximum information quantity-reliability rule, to solve the technical problem that an aerodynamic model and parameters provided from a flight test are low in correctness due to the existing maximum information quantity rule. According to the technical scheme, reliability parameters are introduced into the maximum information quantity rule, and a modeling rule can be corrected according to flight test factors of different aircrafts; and measurement variances Rj and Rj+1 are estimated and subjected to U-D decomposition so as to obtain a scalar model selection discriminant. Aerodynamic and moment models of the aircraft can be directly and conveniently established according to flight test data, and the technical problem that the aerodynamic model and the parameters obtained from the flight test are incorrect due to increment of fixed parameters in the maximum information quantity rule can be 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 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 main model is established ac...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 史忠科
Owner NORTHWESTERN POLYTECHNICAL UNIV
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