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Method for building flight freezing state space in flight freezing simulator

A state space and simulator technology, applied in the field of flight simulators, can solve problems such as limited number, unable to cover flight and atmospheric conditions, etc.

Inactive Publication Date: 2014-07-02
西安远景动力模拟技术有限公司
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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 building flight freezing state space in flight freezing simulator
  • Method for building flight freezing state space in flight freezing simulator
  • Method for building flight freezing state space in flight freezing simulator

Examples

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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 o...

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Abstract

The invention provides a method for building a flight freezing state space in a flight freezing simulator. The method includes processing the rules of a complex simulating system and massive flight freezing numerical simulation data results, and structural forms of the constructed flight freezing state space. The method mainly includes: selecting a sample space, generating the autocorrelation coefficient matrix of the sample space, generating the feature vector of the sample space, generating a group of orthogonal basis of the sample space, generating the feature coefficient matrix of the sample space and the feature coefficient interpolation of the sample space, generating the flight freezing 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 the aircraft passes through the 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 exampl...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 路明
Owner 西安远景动力模拟技术有限公司