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Method for establishing flight icing state space in flight icing simulator

A state space and simulator technology, applied in the field of flight simulators, which can solve problems that cannot cover flight, atmospheric conditions, and limited number of

Inactive Publication Date: 2013-02-06
TIANJIN AEROCODE ENG APPL SOFTWAREDEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In reality, the number of these original samples is limited and cannot cover various flight and atmospheric conditions

Method used

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  • Method for establishing flight icing state space in flight icing simulator
  • Method for establishing flight icing state space in flight icing simulator
  • Method for establishing flight icing state space in flight icing simulator

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Embodiment Construction

[0064] The principle of the method for establishing the flight icing state space in the flight icing simulator proposed by the present invention will be further described below with a specific embodiment. This implementation example is about the establishment of the state space for flight icing of two-dimensional NACA0012 wings in the flight icing simulator.

[0065] Known flight parameters:

[0066] Mach number M ∞ =0.35;

[0067] Reynolds number Re=4.8x10 6 ;

[0068] Known atmospheric parameters:

[0069] Liquid water content LWC=0.45(g / m 3 );

[0070] Average diameter MVD = 20 (μm);

[0071] The composition of the original sample space:

[0072] Under the above-mentioned flight conditions and atmospheric conditions, there are 8 atmospheric temperatures of 12, 15, 18, 20, 22, 25, and 28F. Calculated by computational fluid dynamics software, the icing state (position and shape) within 400 seconds uses a total of 1,420,000 spatial nodes, and a total of 1024 nodes on ...

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Abstract

The invention discloses a method for establishing a flight icing state space in a flight icing simulator. The method comprises processing rules of a complex simulation system and a large number of flight icing numerical simulation data results, and a structural form of the formed flight icing state space. The method mainly comprises the following steps: choosing a sample space, generating an autocorrelation coefficient matrix of the sample space, generating characteristic vector of the sample space, generating a group of orthogonal bases of the sample space, generating a characteristic coefficient matrix of the sample space, interpolating characteristic coefficients of the sample space, generating the flight icing state space and the like.

Description

1. Technical field [0001] The invention relates to the field of aeronautical engineering and is specially used in flight simulators. The flight icing state space refers to the structure of the relationship among the data formed by the data set of certain performances of the aircraft under various flight icing conditions after being re-expressed according to the method provided by the present invention. 2. Background technology [0002] When an aircraft passes through clouds within a certain flight altitude range, if it encounters an area that meets the icing conditions in the atmosphere, an ice layer will form on the surface of the aircraft fuselage and some parts. This phenomenon is called flight icing . The freezing conditions in the atmosphere mainly refer to the ultracold liquid water content in the atmosphere and the scale of ultracold liquid water droplets. The flight icing of the aircraft first affects the aerodynamic characteristics of the aircraft, for example, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 路明
Owner TIANJIN AEROCODE ENG APPL SOFTWAREDEV