Parametric identification technique for a periodic time-varying rotor system

被引：0
|
作者：
Wang Z. [1 ,2 ]
Wang J. [1 ]
Liu Y. [1 ]
机构：
[1] School of Energy and Power Engineering, Beihang University, Beijing
[2] Liaoning Provincial Key Lab of Advanced Measurement and Test Technology of Aviation Propulsion Systems, Shenyang Aerospace University, Shenyang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 05期
关键词：
Asymmetric rotor; Parametric identification; Periodic time-varying system; Square wave pulse function;
D O I：
10.13465/j.cnki.jvs.2019.05.004
中图分类号：
学科分类号：
摘要：
For a periodic time-varying rotor system, parametric identification method based on the square wave pulse function was proposed. Firstly, the state-space matrix equation of the system was expanded with the square wave pulse function. Then recursion formulas for parametric identification of the system were derived adopting decorrelation and orthogonality of the square wave pulse function according to the matrix partition and spectral decomposition theory. Structural parametric identifications for a 2-DOF stiffness periodic time-varying system simulation model and an actual asymmetric rotor system were conducted with the proposed method. The results showed that their stiffness values are recognized correctly under appropriate calculation steps with the mean absolute percentage error of less than 0.5% and 1%, respectively; the correctness and effectiveness of the proposed method are verified, so it is valuable for engineering application. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：21 / 27
页数：6
相关论文
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