Airplane icing on-line detection method based on statistical test and filtering

Abstract

The invention discloses an airplane icing on-line detection method based on statistical test and filtering. The airplane icing on-line detection method at least comprises the following steps that S1,flight state measurement data, engine thrust data and rudder deviation input data in the flight process are collected; S2, an icing starting moment is detected by utilizing a generalized likelihood ratio test method; S3, a disturbance signal is generated to be superposed on the rudder deviation input data, and joint state estimation and aerodynamic derivative identification influenced by icing areconducted on the flight state measurement data by utilizing an H-infinity filtering method; S4, an icing end moment is detected by utilizing the generalized likelihood ratio test method; and S5, generating and superposing of the rudder deflection disturbance signal are stopped, and joint state estimation and aerodynamic derivative identification influenced by icing continue to be conducted on themeasurement data by utilizing H-infinity filtering until the flight is finished. By combining quick icing detection and a parameter estimation method, an airplane icing detection algorithm with stronger functions is obtained.

Description

technical field [0001] The invention belongs to the technical field of online detection of aircraft icing, and in particular relates to an online detection method of aircraft icing based on statistical inspection and filtering. Background technique [0002] Aircraft icing online detection refers to the detection of icing phenomena that occur during aircraft flight through detection devices or methods, and gives an icing alarm to activate the aircraft anti-icing device, so as to avoid the harm caused by icing during flight to aircraft safety. [0003] On-line detection of icing usually has two classifications: hardware detection and algorithm detection. Hardware detection is to detect the icing position and ice type parameters through hardware devices such as sensors arranged on the surface of the body. Algorithm detection refers to the use of mathematical methods and physical models. The flight measurement data are used to estimate the aerodynamic parameters of the aircraft ...

AI Technical Summary

Problems solved by technology

[0004] Aircraft icing algorithm detection usually focuses on the research on the detection algorithm, and there is less research on some specific issues applied to the flight process

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