摘要
以超磁致伸缩驱动器(GMA)油膜轴承-柔性转子系统为研究对象,计入轴承质量和转子刚度建立了包括GMA磁滞伸缩力模型在内的动力学方程,利用Routh-Hurwitz准则,推导了GMA油膜轴承所支承的单质量弹性对称转子系统的稳定性判据。考察了驱动GMA的反馈电流的相位角和电流大小、转子刚度、转子质量和轴承质量对系统失稳转速的影响。结果表明,反馈电流的相位角对系统失稳转速影响很大,存在一个最佳值,使系统的失稳转速最高,系统稳定性最佳,并随着反馈驱动电流和转子刚度的增大,失稳转速明显增大;随着转子质量的增加,系统的失稳转速也是增加的,而轴承的质量对系统的失稳转速影响不大。计算结果在GMA油膜轴承-转子系统整体建模方面有一定的意义。
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 for overall modeling of a GMA oil film bearing-rotor system.
作者
吴超
尹雪梅
马明飞
王文
张直明
WU Chao;YIN Xuemei;MA Mingfei;WANG Wen;ZHANG Zhiming(School of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;Henan Provincial Key Lab of Mechanical Equipment Intelligent Manufacturing,Zhengzhou University of Light Industry,Zhengzhou 450002,China;School of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第1期57-61,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(51706209
U1404515)
河南省高校青年骨干教师培养计划(2017GGJS094)
河南省科技攻关项目(192102210213)
河南省教育厅重点项目计划(20A460028)
关键词
超磁致伸缩驱动器
失稳转速
转子刚度
轴承质量
gaint magnetostrictive actuator(GMA)
unstable rotating speed
rotor stiffness
bearing mass
