气压缓冲器非线性数学模型辨识

推进技术 ›› 2000, Vol. 21 ›› Issue (4): 44-46.

气压缓冲器非线性数学模型辨识

于达仁,阎志刚,鲍文,史新兴,何保成

哈尔滨工业大学能源科学与工程学院!黑龙江哈尔滨150001;哈尔滨工业大学能源科学与工程学院!黑龙江哈尔滨150001;哈尔滨工业大学能源科学与工程学院!黑龙江哈尔滨150001;航天机电集团公司31所!北京100074;航天机电集团公司31所!北京100074

发布日期:2021-08-15

Identification of nonlinear mathematic model of Air pressure buffer

School of Energy Science and Engineering,Harbin Inst.of Technology,Harbin 150001,China;School of Energy Science and Engineering,Harbin Inst.of Technology,Harbin 150001,China;School of Energy Science and Engineering,Harbin Inst.of Technology,Harbin 150001,China;The 31st Research Inst.,Beijing 100074,China;The 31st Research Inst.,Beijing 100074,China

Published:2021-08-15

摘要/Abstract

摘要： 为了求得某涡喷发动机中气压缓冲器的高精度数学模型 ,利用机理建模的方法 ,建立了气压缓冲器非线性数学模型的基本结构 ,用模型辨识方法得到了模型的参数。通过时域仿真与实测结果的比较 ,证明非线性模型的最大误差比线性模型的小 3倍。

关键词: 涡轮喷气发动机;发动机燃料系统;流量调节器;缓冲器;非线性;数学模型

Abstract: A way to establish a high precision model of an air pressure buffer in a turbo jet was introduced.It contains two phases:firstly to derive the nonlinear model structure based on the physical mechanism of the buffer,secondly to identify the parameters of the nonlinear model from test data.Through comparisons of the simulation results and the field test results,it is shown that the maximum error of the nonlinear model is about a third of that of the linear model.

Key words: Turbojet engine;Engine fuel system;Flow regulator;Snubber;Nonlinearity;Mathematical model

于达仁,阎志刚,鲍文,史新兴,何保成. 气压缓冲器非线性数学模型辨识[J]. 推进技术, 2000, 21(4): 44-46.