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Simulink modeling method for mechanical hydraulic device of aero-engine fuel regulator

A technology for aero-engines and fuel regulators, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as simulation calculation speed not as good as Simulink, complex double-layer nested algebraic loops, etc.

Active Publication Date: 2019-05-21
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] According to the existing literature, most of the modeling and simulation work on the mechanical hydraulic device of the engine fuel control system is carried out on the AMESim platform. Compared with the MATLAB / Simulink platform, the mechanical hydraulic device model established on the AMESim platform is more intuitive. But the simulation calculation speed is far inferior to Simulink
Since the components in the mechanical hydraulic device interact with each other, modeling in Simulink involves complex double-layer nested algebraic loop problems

Method used

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  • Simulink modeling method for mechanical hydraulic device of aero-engine fuel regulator

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with accompanying drawing.

[0060] A Simulink modeling method for the mechanical hydraulic device of an aero-engine fuel regulator, comprising the following steps:

[0061] S1. Using the analytical method, model the main pressure difference control loop in the mechanical hydraulic device of the engine fuel control system. The main pressure difference control loop includes the metering valve, the oil return valve and the pressure difference valve;

[0062] S2. According to the flow equation, the main fuel oil circuit of the mechanical hydraulic device, that is, the oil circuit that is output by the gear pump, passes through the metering valve, the high-pressure shut-off valve, and the throttle nozzle, and flows to the fuel distributor, is modeled according to the idea of ​​pressure inversion ;

[0063] S3. After completing the modeling of the main differential pressure control circuit and the main oil...

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Abstract

The invention belongs to the technical field of aero-engine mechanical hydraulic device modeling, and provides a Simulink modeling method for a mechanical hydraulic device of an aero-engine fuel regulator. The Simulink modeling method can achieve high-precision simulation of the mechanical hydraulic device of an engine fuel regulation system, and compared with previous modeling simulation in AMESim, the simulation speed is greatly increased. The problem of a double-layer nested algebraic ring occurring when a mechanical hydraulic device performs modeling in Simulink is solved, and the simulation precision of the system is improved. In addition, the disassembling method for the double-layer nested algebraic ring problem has certain universality and can be popularized to algebraic ring problems of other types. Meanwhile, parameters of the simulation model provided by the invention are convenient to modify, and reference can be provided for modeling and simulation of mechanical hydraulicdevices of engine fuel regulation systems of other models.

Description

technical field [0001] The invention provides a Simulink-based modeling method for a mechanical hydraulic device of an aero-engine fuel regulator, and belongs to the technical field of modeling of an aero-engine mechanical hydraulic device. Background technique [0002] Relying on the background, the present invention is a MATLAB / Simulink modeling of a certain type of aero-engine fuel adjustment system mechanical hydraulic device. [0003] The fuel regulation system is the core component of the automatic control of the engine, and it is also an area with a high incidence of failure. Under the current digital demand of aero-engine fuel control system, it is particularly important to establish a mathematical model of fuel control system. The aero engine fuel control system mainly includes three parts: fuel pump, mechanical hydraulic device and fuel distributor. Among them, the mechanical hydraulic device also includes precision components such as metering valves, differentia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王欣悦杜宪孙希明王哲夫彭凯
Owner DALIAN UNIV OF TECH
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