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Method for designing low-altitude wind shear models by means of fusing vortex rings and discrete gust models

A low-altitude windshear and model design technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems of not being able to reflect the real situation realistically, and not be able to effectively test the windshear danger perception and avoidance performance, so as to improve the Effects of accuracy and effectiveness, accident reduction, increased authenticity and effectiveness

Inactive Publication Date: 2017-06-20
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Problems solved by technology

However, considering the actual natural phenomenon, the central strength of wind shear is not constant, it will change with time, so the model is very different from the wind shear influence of the real situation, and cannot realistically reflect the real situation , and thus cannot effectively test the windshear hazard perception and avoidance performance at each stage of aircraft flight

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  • Method for designing low-altitude wind shear models by means of fusing vortex rings and discrete gust models
  • Method for designing low-altitude wind shear models by means of fusing vortex rings and discrete gust models
  • Method for designing low-altitude wind shear models by means of fusing vortex rings and discrete gust models

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Embodiment Construction

[0038] The scheme proposed by the present invention is programmed and verified in the Matlab R2010a environment, and the wind shear model that combines the vortex ring and the discrete wind model mainly includes the microburst model and the discrete gust model. The so-called discrete gust refers to the airflow in which the wind speed in all directions in the atmosphere changes drastically in a short period of time. Due to the instability of atmospheric motion, wind speed varies with time. So-called discrete wind models are widely used in flight qualification, aircraft strength calculations and flight control system design. Among them, the microburst model regards wind shear as an incompressible, inviscid, and irrotating potential flow field, without considering temperature changes.

[0039] Specific steps are as follows:

[0040] A low-altitude wind shear model design method combining vortex ring and discrete gust model, including the design of microburst model and discrete ...

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Abstract

The invention relates to a method for designing low-altitude wind shear models by means of fusing vortex rings and discrete gust models. The method includes designing micro-downburst models and the discrete gust models. The method includes steps of firstly, establishing the vortex rings in runway coordinate systems; secondly, determining vortex ring centers, vortex ring radiuses and central perpendicular wind speeds to obtain vortex ring models with fixed vortex ring central intensity; thirdly, configuring mirror vortex rings; fourthly, importing the discrete gust models; fifthly, adjusting gust gradients of the gust models imported at the fourth step; sixthly, adjusting the relative locations of the centers of the gust models and the centers of the vortex rings so that the magnitude of wind shear central intensity can be changed at any moment, and the magnitude of the intensity of integral wind shear wind fields can be simulated. Runway entrances are used as origins of the runway coordinate systems, and approach directions are used as +XR axes of the runway coordinate systems. The method has the advantages that the wind shear models can be designed by means of fusing the vortex rings and the discrete gust models, and the magnitude of the vortex ring central wind speeds of the wind shear models can be changed along with change of the time.

Description

technical field [0001] The invention relates to the field of method inventions, specifically a design of a low-altitude wind shear model that integrates a vortex ring and a discrete gust model. The invention designs a low-altitude wind shear model that fits actual natural phenomena, and can be applied to aircraft against wind Research and testing of shear hazard passive sensing and avoidance performance. Background technique [0002] Wind shear is an atmospheric phenomenon, which refers to the change of wind speed and wind direction between two points in the atmosphere. The size can be expressed by dividing the wind speed difference between two points by distance or time, including vertical shear of horizontal wind, horizontal Shear, the shear of the vertical wind. Low-altitude wind shear refers to wind shear below 600 meters. It is an atmospheric phenomenon related to strong convective weather, frontal weather, low jet current, geography, and environmental factors, which s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 黄翔于超鹏钱君
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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