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Method for correcting numerical simulation of atmospheric turbulences

A numerical simulation and atmospheric turbulence technology, which is applied in the interdisciplinary field of mechanics and aviation, and can solve the problem that the signal does not have the characteristic of turbulent singularity.

Inactive Publication Date: 2013-02-06
BEIHANG UNIV
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Problems solved by technology

This is because the existing numerical simulation methods of atmospheric turbulence are all based on the Gaussian distribution of pseudo-random number signals, and the generated signals naturally do not have the inherent quality of turbulent singularity characteristics

Method used

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  • Method for correcting numerical simulation of atmospheric turbulences
  • Method for correcting numerical simulation of atmospheric turbulences
  • Method for correcting numerical simulation of atmospheric turbulences

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] The present invention provides a numerical simulation correction method for atmospheric turbulence, and establishes a corrected atmospheric turbulence model. The specific method is as follows:

[0017] In the first step, the numerical simulation of atmospheric turbulence using the traditional Dryden model is realized by an iterative method.

[0018] The Dryden model is a traditional atmospheric numerical simulation model, and its one-dimensional turbulence model space spectrum function is expressed as follows:

[0019] E ( Ω ) = σ 2 L π 1 1 + ( LΩ ) 2 ...

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Abstract

The invention discloses a method for correcting numerical simulation of atmospheric turbulences and belongs to the field of interdisciplinary branches of aviation and mechanics. The method includes: firstly, implementing numerical simulation of atmospheric turbulences for a traditional Dryden model by iteration; secondly, performing shell model numerical simulation to obtain a physical quantity capable of reflecting turbulence singular scale features, namely energy transfer rate; and thirdly, introducing the energy transfer rate and correcting the traditional Dryden model numerical simulation signals. The defects of traditional atmospheric turbulence signals are made up, the actual features of atmospheric turbulences are more conformed, and more reasonable atmospheric turbulence signals can be provided for simulation modeling of a flight simulation system of a flight simulator.

Description

technical field [0001] The invention belongs to the category of interdisciplinary subjects of aviation and mechanics, and specifically relates to a numerical simulation correction method of atmospheric turbulence. Background technique [0002] Aircraft often encounter various atmospheric disturbances when flying in the air, such as low-altitude wind shear and atmospheric turbulence. Atmospheric turbulence is the main atmospheric disturbance phenomenon that affects aircraft movement in the aircraft cruising state. It is a continuous random fluctuation of the wind velocity vector superimposed on the steady wind. It is of great significance to train pilots' flying skills and adaptability by simulating the flight of aircraft in various disturbance wind fields with high fidelity on the flight simulator. If the flight simulation system of the flight simulator can simulate the influence of atmospheric disturbance on flight with high fidelity, it is necessary to establish various h...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 郭昊刘沛清李阳屈秋林曲祖坤刘振臣
Owner BEIHANG UNIV
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