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Fault diagnosis method of fuel regulator of aero-engine

A fuel regulator and aero-engine technology, applied in control/regulation systems, instruments, electrical testing/monitoring, etc., can solve problems such as low efficiency, low diagnostic accuracy, complicated operation, etc., and achieve simple operation and high accuracy Effect

Inactive Publication Date: 2018-03-13
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of complicated operation, low efficiency and low diagnostic accuracy in the prior art, and proposes a fault diagnosis method for an aero-engine fuel regulator

Method used

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  • Fault diagnosis method of fuel regulator of aero-engine
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  • Fault diagnosis method of fuel regulator of aero-engine

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Embodiment Construction

[0025] In order to make the purpose, technology and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0026] A method for fault diagnosis of an aero-engine fuel regulator based on BP neural network, comprising the following steps:

[0027] Step 1: The fuel regulator is mainly composed of metering valve, differential pressure valve, interlocking valve, duty ratio valve, distributor valve, starting solenoid valve, constant pressure valve, high-speed solenoid valve, parking solenoid valve, displacement sensor, housing, electric Connectors etc.

[0028] Model the entire fuel conditioning system from components to systems, from simple to complex. First, a component-level model is established according to the working principle of each component, and specific data is substituted into the component-level model for simulation to verify the typical characteristics...

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Abstract

The invention discloses a fault diagnosis method of a fuel regulator of an aero-engine. The method comprises the following steps: on the basis of a part-level modeling method, a high precision model of a fuel regulator is established; on the basis of the conventional model, fault parameters are introduced by means of soft faults to simulate various typical faults that may occur in a real fuel regulator; a parameter that can reflect the system state is selected from a measurable output value of the fuel regulator and parameter feature values in various fault modes are extracted; sample sets ofdifferent fault modes are established and the sample sets are divided into training samples and testing samples; the samples are trained and tested by using a BP neural network as a classifier so as to realize the fault diagnosis of the fuel regulator. According to the invention, problems of many parameters for collection, tedious operations, and low diagnosis accuracy according to the existing fuel regulator fault diagnosis technology are solved. The fault diagnosis method can be applied to the field of fault diagnosis of aero engine fuel regulators or the fault diagnosis field of other hydraulic systems.

Description

technical field [0001] The invention belongs to fault diagnosis technology, and in particular relates to a fault diagnosis method for an aircraft engine fuel regulator. Background technique [0002] The aero-engine fuel regulator belongs to a complex mechanical-hydraulic system, which is composed of multiple components that are coupled with each other, and is an important part of the aero-engine. On the one hand, the fuel regulator is used as the actuator of the main control amount of fuel, and on the other hand, it is used as the mechanical hydraulic control backup of the digital control system of the aero-engine. Its performance directly affects the working state of the engine, and even affects the safety and reliability of the aircraft. . Once a component in the fuel regulation system of an aeroengine fails, the function of the entire fuel regulator will be affected. If the failure cannot be eliminated in time, it may cause a major accident. Therefore, it is very valuab...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0256
Inventor 王珂杜宪彭凯孙希明
Owner DALIAN UNIV OF TECH
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