Characteristic parameters estimation of active magnetic bearings in a coupled rotor system

被引：1

作者：

Kuppa S.K. ^{[1
]}

Lal M. ^{[1
]}

机构：

[1] Department of Industrial Design, National Institute of Technology Rourkela, Rourkela

来源：

Journal of Verification, Validation and Uncertainty Quantification | 2019年 / 4卷 / 03期

关键词：

Frequency domain analysis - Two term control systems - Runge Kutta methods - Magnetic bearings - Proportional control systems - Time domain analysis - Alignment;

D O I：

10.1115/1.4045295

中图分类号：

学科分类号：

摘要：

Present research inspects the performance of rotor-bearing-coupling system in the presence of active magnetic bearings (AMBs). A methodology is suggested to quantify various fault characteristics along with AMB characteristic parameters of a coupled turbine generator system. A simplest possible turbogenerator system is modeled to analyze coupling misalignment. Conventional methodology to estimate dynamic system parameters based on forced response information is not enough for AMB-integrated rotor system because it requires current information along with displacement information. The controlling current of AMB is tuned and controlled with a controller of proportional-integral-derivative (PID) type. A numerical technique (Lagrange's equation) is applied to get equations of motion (EOM). Runge-Kutta technique is used to obtain EOM to acquire the time domain responses. The fast Fourier transformation (FFT) is applied on obtained responses to acquire responses in the frequency domain, and full spectrum technique is applied to propose the methodology. A methodology that depends on the least squares regression approach is proposed to evaluate the multifault parameters of AMB-integrated rotor system. The robustness of the algorithm is checked against various levels of noise and modeling error and observed efficient. An appreciable reduction in misalignment forces and moments is observed by using AMBs. Copyright © 2019 by ASME

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