某型航空发动机主燃油控制系统频率特性研究  

Research on Frequency Characteristics of an Aeroengine Main Fuel Control System

作　　者：杨艺琨 马静[1] 杨军杰 YANG Yikun;MA Jing;YANG Junjie(School of Power and Energy,Northwestern Polytechnical University,Xi′an Shaanxi 710072,China;AECC Xi′an Engine Control Co.,Ltd.,Xi′an Shaanxi 710077,China)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072 [2]中国航发西安动力控制科技有限公司,陕西西安710077

出　　处：《机床与液压》2024年第13期140-149,共10页Machine Tool & Hydraulics

基　　金：航空发动机及燃气轮机基础科学中心项目(P2022-DB-V-001-001,P2022-A-V-001-001)。

摘　　要：为研究某型航空发动机数控系统主燃油控制系统频率特性,基于力平衡方程和流量连续方程建立元件和系统的动态数学模型。在其稳态工作点附近采用小偏离线性化建立等压差模块、主燃油计量模块、停车控制模块和整个系统的传递函数,并通过Fluent流场仿真重点研究了关键元件的稳态液动力及影响因素。在此基础上建立了主燃油控制系统的Simulink仿真模型,研究了控制系统的频率特性和关键活门固有频率。结果表明:主燃油控制系统的频率特性与实际工程经验一致,稳定裕度较高;系统的固有频率与系统中固有频率最低的元件基本一致;当元件结构确定时,稳态液动力对固有频率的影响较大。研究结果为燃油控制系统频率域优化设计提供了理论支持。In order to investigate the frequency response characteristics of the main fuel control system in a certain type of aircraft engine numerical control system,a dynamic mathematical model of the components and the system was established based on force balance equations and flow continuity equations.Using small deviation linearization around the steady-state operating point,transfer functions were developed for the pressure differential module,main fuel metering module,parking control module,and the overall system.Fluent flow field simulation was employed to study the steady-state hydrodynamic characteristics and the factors that affected these characteristics of key components.Based on the results,a Simulink simulation model of the main fuel control system was established to investigate the frequency response characteristics and the natural frequencies of key flaps in depth.The results demonstrate that the frequency response characteristics of the main fuel control system are consistent with practical engineering experience and exhibit high stability margins.The natural frequency of the system corresponds closely to that of the metering valve with the lowest natural frequency in the system.When the component structure is determined,steady-state hydrodynamics have a greater influence on the natural frequency.The research results provide theoretical support for the frequency-domain optimization design of the fuel control system.

关 键 词：主燃油控制系统 SIMULINK仿真 频率特性 固有频率 稳态液动力 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计] TP391.9[自动化与计算机技术—计算机应用技术]