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Airplane surface ice accretion evolution state identification method and system

An identification method and surface area technology, applied in the field of ice detection on aircraft surface area, can solve the problems of high image quality requirements, large influence, limited accuracy, etc., and achieve the effects of good application prospects, small result errors, and high reliability.

Active Publication Date: 2022-02-25
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) All kinds of sensors in the prior art are greatly affected by the environment and have low precision, and the cost is high and it is difficult to be widely used
[0007] (2) Existing computer vision methods have high requirements on image quality and are greatly affected by hardware and environmental factors, and the accuracy is limited
[0011] In order to solve the problems that the existing aircraft ground icing detection method is greatly affected by the environment, the accuracy is limited, and it is difficult to popularize, etc.; combined with the evolution mechanism of the environmental situation, a method for identifying the evolution state of aircraft surface icing is proposed.

Method used

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  • Airplane surface ice accretion evolution state identification method and system
  • Airplane surface ice accretion evolution state identification method and system
  • Airplane surface ice accretion evolution state identification method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0103] Such as figure 1 As shown, the identification method of aircraft surface ice evolution state includes:

[0104] (1) Determine the atmospheric temperature T, humidity h, wind speed v, and air pressure P as input variables, and ice type m and ice thickness d as output variables

[0105] (2) Taking the historical temperature, humidity, wind speed and air pressure data as input variables, and taking the ice accumulation type and thickness under the corresponding historical meteorological factors as output variables to construct the input and output sequence ,

[0106] (3) Half of the input and output sequence in step (2) constitutes the past moment input and output Hankle matrix , , and the other half constitutes the input and output Hankle matrix at the future time , ;

[0107] (4) the step (3) in the p, f Select the parameter n greater than the order of the system to obtain the Hankle form state space expression , , and then get the generalized observab...

Embodiment 2

[0172] An algorithm for identifying the evolution state of icing on the aircraft surface. The identification of the evolution state of icing needs to obtain historical data of input and output variables as a training set and a test set. Collect meteorological data through temperature and humidity sensors, anemometers, and barometers, such as figure 2 The temperature curve of a certain period of time collected by the temperature sensor, image 3 Humidity curves collected by anemometer for a certain period of time, Figure 4 It is shown in the air pressure curve of a certain period of time collected by the barometer.

[0173] The meteorological data is uniformly used in international units, and the data is processed to eliminate useless data groups. Gray-scale processing and edge processing are performed on the ice-type image, compared with conventional bright ice, frost ice, mixed ice gray-scale images, and edge images to identify the type of ice and determine the k value. ...

Embodiment 3

[0175] The aircraft surface ice evolution state identification algorithm, after obtaining the output matrix of implementation 1, the meteorological factors such as temperature, humidity, wind speed and air pressure collected by the airborne equipment are substituted into the model, and the actual value and identification of ice thickness are obtained as shown in Table 1. value.

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Abstract

The invention belongs to the technical field of airplane surface ice accretion detection, and discloses an airplane surface ice accretion evolution state identification method and system. The airplane surface ice accretion evolution state identification method comprises the following steps: collecting historical airplane surface historical ice accretion meteorological factor data and ice accretion evolution microscopic information, constructing Hankle form state space expressions of airplane key part ice accretion in the past and future for airplane surface ice accretion, obtaining an observable matrix and judging generalized observability of the observable matrix; carrying out oblique projection on the state space expressions, eliminating external non-meteorological variables and future ice accretion microscopic information noise influences, and obtaining a state estimation sequence; in combination with the state estimation sequence and the observable matrix, obtaining a system matrix of a spatial model through least square, obtaining an evolution state identification model of airplane surface ice accretion, and predicting airplane ice accretion evolution state information. The invention has the advantages of being fast in response, being able to change along with the environment, easy to implement and the like, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of aircraft surface ice detection, and in particular relates to an aircraft surface ice evolution state identification method, an aircraft surface ice evolution state identification system, a program storage medium for receiving user input, and an information data processing terminal. Background technique [0002] As the fastest means of transportation at present, airplanes have brought great convenience to passengers and cargo transportation. Flight safety is not only the top priority of major airlines, but also the top priority of every consumer. Although aircraft flight technology is becoming more and more advanced and the level of ground support is getting higher and higher, the ice accumulation on the surface of aircraft is still one of the key factors affecting the safe take-off of aircraft in high latitude and high altitude areas in my country. Icing on the surface of the aircraft, especially key part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/27G06F17/16G06F16/21
CPCG06F30/15G06F30/27G06F17/16G06F16/219Y02T90/00
Inventor 王立文李彪邢志伟阚犇陈斌陈飞
Owner CIVIL AVIATION UNIV OF CHINA
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