基于超磁致伸缩驱动器的油膜轴承-转子系统的稳定性研究

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Abstract Taking an oil film bearing-rotor system based on GMA as the study object, considering bearing mass and rotor stiffness, its dynamic equation including a GMA magnetic hysteretic force model was established. Routh-Hurwitz criterion was used to derive the stability criterion for a single mass elastic symmetric rotor system supported by GMA oil-film bearings. Effects of rotor stiffness, rotor mass, bearing mass, phase angle and amplitude of feedback current to drive GMA on system unstable rotating speed were investigated. The results showed that phase angle of feedback current affects greatly system unstable rotating speed, and it has an optimal value to make system unstable rotating speed highest and system stability best; with increase in feedback driving current and rotor stiffness, unstable rotating speed increases obviously; with increase in rotor mass, system unstable rotating speed also increases, however, bearing mass has little influence on system unstable rotating speed; the calculated results provide a reference foroverall modeling of a GMA oil film bearing-rotor system.

Key words： gaint magnetostrictive actuator (GMA) unstable rotating speed rotor stiffness bearing mass

Received: 06 September 2018 Published: 28 December 2019

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	Articles by authors
	WU Chao1
	2
	YIN Xuemei3
	MA Mingfei4
	WANG Wen4
	ZHANG Zhiming4

Cite this article:

WU Chao1,2,YIN Xuemei3, et al. Stability of oil film bearing-rotor system based on GMA[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 57-61.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I1/57

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