Fault detection, diagnosis and performance evaluation method for redundant aileron actuator

Abstract

The invention discloses a fault detection, diagnosis and performance evaluation method for a redundant aileron actuator. According to the method, fault detection, diagnosis, evaluation and real-time detection of the actuator are performed by means of an input order signal, an output displacement signal, a force motor current signal and aerodynamic loading data of the actuator; the fault detection is realized by a two-stage neural network, a first neural network is used as a system observer and is matched with actual output to acquire a residual error, and a second neural network outputs a self-adaptive threshold value synchronously; the fault detection is realized by the system observer and a force motor current observer; a time domain feature is extracted from a residual error signal and output to a self-organizing mapping neural network, and a minimum quantization error is acquired and normalized to a health degree, so that the actuator performance is evaluated; and on the basis of fault detection, the aerodynamic loading data is introduced, by means of a specific input order spectrum, the system observer and the neural network with the self-adaptive threshold value are trained, and the real-time fault detection is realized.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of a hydraulic servo system, in particular to a method for fault detection, diagnosis and performance evaluation of a redundant aileron actuator based on a neural network. Background technique [0002] Aircraft aileron actuator is an important part of aircraft flight control system. Fault detection and fault diagnosis of aileron actuator is one of the important means to improve the reliability and safety of aircraft flight control system. For some common faults of aileron actuators, such as sensor faults, force motor faults, and leakage faults, early detection and treatment can improve the use efficiency of the aircraft and effectively improve the safety of the flight control system. Therefore, it is necessary to carry out fault detection and fault diagnosis for redundant aileron actuators. At the same time, in recent years, in order to overcome the contradiction between "under-maintenan...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the following problems: under the condition of redundancy, due to the correction and compensation of the output of the fault channel by the remaining channels, the problem of difficult fault detection is caused; The problem of large disturbance i

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