Influence of conical degree on the performance of radial and axial integrated auxiliary bearing for active magnetic bearing system

Yu, Chen; Sun, Yuemei; Wang, Hongchang; Shi, Fan; Chen, Yu; Shan, Wentao

doi:10.1007/s12206-019-0911-z

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…The system then turns into a linear gear transmission system driven by motor 1 and a system with motor 2. The torques are then calculated using (10):…”

Section: Control Model Of the Systemmentioning

confidence: 99%

“…Through mathematical modeling, the study found that gear backlash could be eliminated by adjusting the radius of the roller and the base circle; the problems of teeth seizing and scuffing caused by zero backlash could also be avoided by using the roller's self-rotation property. References [10], [11] presented designs for different bearings that could eliminate the protective backlash and used these bearings in an active magnetic bearing system.…”

Section: Introductionmentioning

confidence: 99%

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Research on Clearance Elimination Control Based on Linearization

et al. 2021

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The accuracy and operational stability of a turntable system can be reduced by the backlash problem that occurs in the reducer's gear transmission system. To solve this problem, this work proposes a scheme in which two motors are used to eliminate the effects of backlash through a linearization process. By calculating and outputting two independent torques synchronously from the two servo motors to the system output shaft's gears, a nonlinear system with backlash can be transformed into a linear system without backlash, thus making the resulting system easy to control. Experiments verify that the system will remain stable after the movement of the output shaft stops.INDEX TERMS Backlash, double-motor system, gear transmission system, linearization algorithm. JINJI QIU received the B.Sc. degree from the Harbin Institute of Technology, China, in 2019, where he is currently pursuing the M.Sc. degree. His research interests include circuit design and magneto-electric encoder. SHUANGHUI HAO was born in Guizhou, China, in 1963. He received the B.Sc. degree from Tianjin University, in 1985, then began his research on special motor at Shanghai Electrical Apparatus Research Institute, China. After that, he received the M.Sc. and Ph.D. degrees from the Kyushu Institute of Technology, Japan, in 1997. He then went to YASKAWA Electric Corporation, Japan, and worked on AC servo motor. In 2003, he began to work with the Harbin Institute of Technology as a Professor. He is the author of more than 100 articles and has more than 60 patents. His research interests include magneto-electric encoder, AC servo systems, numerical control, and signal processing.

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“…The system then turns into a linear gear transmission system driven by motor 1 and a system with motor 2. The torques are then calculated using (10):…”

Section: Control Model Of the Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on Clearance Elimination Control Based on Linearization

et al. 2021

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“…Active Magnetic bearing (AMB) has many advantages over its passive counterpart such as noncontacting nature of suspension over the convention fluid film and anti-friction bearings, elimination of lubricant, very low friction, no wear, high rotor speed and high load carrying capacity at extreme conditions such as very high or very low temperature and vacuum. Many scientific articles dealing with control of rotating machinery via AMB system have been published [11][12][13][14][15][16][17][18][19][20]. But AMB based active control strategy dealing with suppression of the Sommerfeld effect in non-ideal internally damped rotor system was not reported before 2019.…”

Section: Introductionmentioning

confidence: 99%

Instability attenuation and bifurcation studies of a non-ideal rotor involving time-delayed feedback

Dasgupta

2022

Nonlinear Dyn

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In non-ideal vibratory system, the excitation is a nonlinear function of system response. The dynamic behavior of such system is often characterized by an energy source with limited power. The study of instability phenomena in non-ideal rotor driven through a non-ideal energy source is of considerable current interest. The non-ideal rotor system often gets destabilized on exceeding a critical input power near the resonance. This kind of instability is termed as Sommerfeld effect marked with nonlinear jump phenomena. This paper investigates the attenuation of nonlinear jump phenomena and numerical study of bifurcations of a non-ideal unbalanced rotor system with internal damping using time delayed feedback via active magnetic bearings. The results show that the time delay indeed plays a critical role on the suppression of the jump phenomena. Following, some new insights are also revealed through a numerical study of saddle node, Hopf and trans-critical bifurcations with time delay as a bifurcation parameter. The transient analysis confirms the results obtained analytically through the steady-state consideration.

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Dynamic responses after rotor drops onto a new-type active eliminating protective clearance touchdown bearing

Zhu

Zhang

2020

J Mech Sci Technol

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Influence of conical degree on the performance of radial and axial integrated auxiliary bearing for active magnetic bearing system

Cited by 6 publications

References 22 publications

Research on Clearance Elimination Control Based on Linearization

Research on Clearance Elimination Control Based on Linearization

Instability attenuation and bifurcation studies of a non-ideal rotor involving time-delayed feedback

Dynamic responses after rotor drops onto a new-type active eliminating protective clearance touchdown bearing

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