航空科学技术2026，Vol.37Issue(1)：92-102,11.DOI:10.19452/j.issn1007-5453.2026.01.011
基于双层平衡流形展开模型的涡扇发动机系统辨识
Gas Turbine System Identification Using a Bilayer Equilibrium Manifold Expansion Model
摘要
Abstract
To address the applicability issues of traditional single-input system identification methods in turbofan engine control and fault diagnosis,particularly their limitations in handling highly nonlinear dynamic characteristics and multiple input-output relationships,this paper proposes an input dimension expansion method based on similarity theory and affine structure.By integrating the reduced-order equilibrium manifold expansion(EME)model with the multi-cell equilibrium manifold expansion model,this method enables multi-input modeling within the framework of a single-input equilibrium manifold expansion model.The effectiveness of the proposed dual-layer equilibrium manifold expansion model is validated through theoretical analysis and simulation experiments.The results demonstrate that the maximum error of the proposed model is only 1.309％,significantly lower than that of other models,while its average error range is merely one-fourth of that of the NARX network model.Compared to traditional nonlinear models(such as Wiener,Hammerstein,Hammerstein-Wiener,and NARX network models),the proposed model exhibits superior accuracy and computational stability.This study lays a crucial foundation for future model-based research on fault detection,isolation,and control in turbofan engines.关键词
系统辨识/双层平衡流展开模型/多胞系统/相似理论Key words
system identification/bilayer equilibrium manifold expansion model/multi-cell system,similarity theory分类
航空航天引用本文复制引用
朱麟海,丁恩良,刘佳琦,佟晓龙,陈闯,孙圣瀚,马乙超..基于双层平衡流形展开模型的涡扇发动机系统辨识[J].航空科学技术,2026,37(1):92-102,11.基金项目
航空科学基金(2022Z071001007) Aeronautical Science Foundation of China(2022Z071001007) （2022Z071001007）
