A simulink modeling method for the mechanical hydraulic device of an aero-engine fuel regulator

Abstract

The invention belongs to the technical field of modeling of aero-engine mechanical hydraulic devices, and proposes a Simulink modeling method for a mechanical hydraulic device of an aero-engine fuel regulator. The Simulink modeling method can realize high-precision simulation of the mechanical hydraulic device of an engine fuel regulator system, Compared with the modeling simulation in the previous AMESim, the simulation speed is greatly improved; and the problem of double-layer nested algebraic loops that occurs when mechanical hydraulic devices are modeled in Simulink is solved, and the simulation accuracy of the system is improved; in addition, the double-layer nested The dismantling method of the set of algebraic loop problems has certain universality, and can be extended to other types of algebraic loop problems; at the same time, the simulation model parameters provided by the present invention are easy to modify, and can be used for mechanical hydraulic devices of other types of engine fuel adjustment systems. Modeling and simulation provide reference.

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...

AI Technical Summary

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

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