Fault diagnosis method for aircraft airspeed tube based on neural network analysis and redundancy

Abstract

The invention provides a fault diagnosis method for an aircraft airspeed tube based on neural network analysis and redundancy output. Sufficient historical data of input and output of the aircraft airspeed tube under normal working conditions is obtained, a non-linear neural net model for describing the input and output characteristics of the airspeed tube is established, and the neural network model is trained by using historical training data of input and output under the normal conditions to construct a neural network analytical model of the aircraft airspeed tube. After common fault modesof the airspeed tube are determined, the residual data of the actual output of the airspeed tube and a signal output by the neural network model are collected, when the residual data is greater than atolerance value, it is determined that a fault occurs in the airspeed tube, and the actual output of the airspeed tube and the analytical output signal of the neural network model are subjected to linear regression to identify fault characteristic parameters, thereby identifying fault categories occurring in the airspeed tube and achieving the fault diagnosis of the aircraft airspeed tube.

Description

technical field [0001] The invention relates to a fault diagnosis method for an aircraft pitot tube, in particular to a fault diagnosis method for an aircraft pitot tube based on neural network analysis redundancy. Background technique [0002] As aircraft, especially large aircraft systems, structures, and functions become more and more complex, the flight envelope continues to expand, and the performance of missions improves, it has become an era to develop a highly reliable aircraft self-diagnosis system with fault self-detection and self-diagnosis. development needs. The air data inertial reference system of the aircraft is the main source of flight data acquisition for the aircraft in the process of attitude control, trajectory control and mission execution, and its reliability is the key to the safe flight of the aircraft. Once the air data inertial reference system fails suddenly, it is likely to have a fatal impact on the safe flight of the aircraft. Therefore, it ...

AI Technical Summary

Problems solved by technology

[0003] In the air data inertial reference system of the aircraft, the pitot tube, as a key component for measuring the airspeed of the aircraft, is a very important part of the air data inertial reference system. faulty

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