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Aviation hydraulic steering engine system fault simulation model base building method

A technology for simulating model library and system faults, applied in design optimization/simulation, special data processing applications, instruments, etc., and can solve problems such as complex structure, limited fault characteristics, and many hydraulic steering gear system components.

Inactive Publication Date: 2017-05-17
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] The hydraulic steering gear system has many components, complex structure, and faults are related. A single measurement information contains limited fault characteristics and may cover multiple fault modes. It is necessary to integrate multiple measurement information for fault diagnosis method design
Previous fault diagnosis methods focused on the study of a single component in the steering gear system, ignoring the impact of a single component failure on the entire closed-loop system

Method used

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  • Aviation hydraulic steering engine system fault simulation model base building method
  • Aviation hydraulic steering engine system fault simulation model base building method
  • Aviation hydraulic steering engine system fault simulation model base building method

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Embodiment Construction

[0027] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0028] The embodiment of the present invention constructs a reference model library for a typical hydraulic rudder system, the system structure diagram is as follows figure 1 As shown, the electro-hydraulic servo valve amplifies and converts the electrical signal output by the controller to control high-power hydraulic energy, thereby pushing the piston of the hydraulic cylinder to run. The displacement of the piston is detected by the displacement sensor and fed back to the input end of the system to form a position closed-loop control.

[0029] refer to figure 2 , the present invention proposes the construction method of fault reference model storehouse for above-mentioned system and specifically implements according to the following steps:

[0030] Step 1: Establish a mathematical model of the hydraulic steering gear system:

[0031] The mathematical model...

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Abstract

The invention relates to an aviation hydraulic steering engine system fault simulation model base building method. The method includes the steps: first, building a mathematic model of a hydraulic steering engine system; second, building simulation nominal models under various working conditions according to the mathematic model of the hydraulic steering engine system, and saving the models and simulation data; third, building fault simulation models under various typical fault conditions based on the simulation nominal models, and saving the models and the simulation data; fourth, building a corresponding relation table of model name keywords, model names and model saving paths to facilitate search for the needed models and simulation data. The status quo of lack of system fault data can be improved, and the data are reserved for subsequent research for a fault diagnosis method for the system.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of a hydraulic steering gear system, and relates to a method for constructing a fault simulation model database of an aviation hydraulic steering gear system (A Method to Construct Simulation Model Database for Hydraulic Actuator System). Background technique [0002] The aviation hydraulic steering gear system is an important subsystem of the flight automatic control system, which has a significant impact on the safe take-off and landing of the aircraft and its flight performance. A typical hydraulic steering gear system is a closed-loop system composed of a controller, a servo valve, a hydraulic cylinder and a position sensor. [0003] The hydraulic steering gear system has many components, complex structure, and faults are correlated. A single measurement information contains limited fault characteristics and may cover multiple fault modes. It is necessary to integrate multiple measurement inform...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 李婷谢蓉曹宇燕
Owner NORTHWESTERN POLYTECHNICAL UNIV
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