Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 32, No. 4 (April 2019) 596-601    Article in Press

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  ANALYSIS OF VIBRATION CHARACTERISTICS OF PD CONTROL ACTIVE MAGNETIC BEARING AND CRACKED ROTOR SYSTEM (RESEARCH NOTE)
 
Z. Zhixian, J. Bolong, W. Jiayuan, L. Yixin and Z. Changsheng
 
( Received: December 13, 2018 – Accepted: March 07, 2019 )
 
 

Abstract    Crack fault of rotor is one of the most prominent problems faced by magnetic bearing rotor system. In order to improve the safety performance of this kind of machinery, it is necessary to research the vibration characteristics of magnetic bearing cracked rotor system. In this paper, the stiffness model of the crack shaft element was established by the strain energy release rate (SERR) theory. The mathematical model of PD controller of AMBs cracked rotor system is based on the finite element method. The vibration characteristics of PD controller of AMBs rotor system were examined in the test rig under crack depth of rotor. The spectrum of vibration characteristics were detected in the AMBs cracked rotor system. The results of experiments showed that the 2× and 3× harmonic components can be used for fault diagnosis of crack fault of AMBs rotor systems under PD controller of AMB.

 

Keywords    Active Magnetic Bearings; PD Control; Cracked Rotor; Finite Element Methods

 

چکیده   

خطای کرک روتور یکی از مهمترین مشکلات مواجهه با سیستم روتور تحمل مغناطیسی است. به منظور بهبود عملکرد ایمنی این نوع ماشین‌آلات، لازم است ویژگی‌های ارتعاشی سیستم روتور شکسته مغناطیسی بررسی گردد. در این مقاله، مدل سختی عنصر شفت کراس توسط تئوری انتشار انرژی (SERR) ایجاد شده است. مدل ریاضی کنترل PD از سیستم روتور cracked AMB بر اساس روش المان محدود است. ویژگی‌های ارتعاشی کنترل PD برای سیستم روتور AMBs در محفظه آزمون تحت عمق روانکاری مورد بررسی قرار گرفت. طیف ویژگی‌های ارتعاش در سیستم روتور ترک خورد شده AMBs تشخیص داده شد. نتایج آزمایش‌ها نشان داد که اجزای هارمونیک 2× و 3× می‌توانند برای تشخیص خطا از خطای کرک سیستم‌های روتور AMB تحت کنترل PD برای AMB استفاده شوند.

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