| 线性拟合法建立航空发动机状态变量模型 |
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| 引用本文： | 陆军,郭迎清,陈小磊.线性拟合法建立航空发动机状态变量模型[J].航空动力学报,2011,26(5):1172-1177. |
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| 作者姓名： | 陆军 郭迎清 陈小磊 |
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| 作者单位： | 西北工业大学动力与能源学院,西安,710072 |
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| 摘 要： | 针对非线性拟合法建立航空发动机状态变量模型过程中的初值问题,提出了一种能够避免该问题的线性拟合法,即在离散域情况下,利用已知的状态序列来构建系统矩阵与模型响应之间呈线性关系的目标函数,从而使非线性最小二乘问题转化为线性最小二乘问题.应用该方法建立某型涡扇发动机的小偏差状态变量模型,并与非线性拟合法进行了对比研究,结果表...
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| 关 键 词： | 航空发动机状态变量模型 线性最小二乘 初值问题 线性拟合法 离散域 |
| 收稿时间： | 2010/4/26 0:00:00 |
| 修稿时间： | 8/31/2010 6:40:06 PM |
Establishment of aero-engine state variable model based on linear fitting method |
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| LU Jun,GUO Ying-qing and CHEN Xiao-lei.Establishment of aero-engine state variable model based on linear fitting method[J].Journal of Aerospace Power,2011,26(5):1172-1177. |
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| Authors: | LU Jun GUO Ying-qing and CHEN Xiao-lei |
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| Institution: | LU Jun,GUO Ying-qing,CHEN Xiao-lei(School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | According to the initial value problem in establishment of aero-engine small perturbation state variable model based on nonlinear fitting method,a linear fitting method against this problem was proposed.The objective function,in which the model outputs are linear functions of system matrix,was constructed by means of the known state sequences in discrete domain,resulting in transformation from nonlinear least square problem to linear least square problem.The method was applied to establish the small perturb... |
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| Keywords: | aero-engine state variable model linear least square initial value problem linear fitting method discrete domain |
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