Nonlinear adaptive control for hybrid foil-magnetic bearing

Tian, Zhongliang; Wei, Zhengyuan; Sun, Yanjing

doi:10.1109/icma.2017.8015793

Cited by 9 publications

(4 citation statements)

References 8 publications

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“…Jeong et al [29] developed a 225 kW class turbo blower by including hybrid foil-magnetic bearings. Tian and Sun [30] presented an adaptive control method to simplify the controller design and improve the performance of the rotor-HFMB system. Jeong and Lee [31] used a control algorithm to reduce the sudden imbalance vibration amplitudes of a rigid rotor which was operated at up to 12,000rpm.…”

Section: Introductionmentioning

confidence: 99%

“…The HFMB technology results in superior vibration stability for unbalance vibration and aerodynamic instability in the range 12,000-15,000rpm (200-250Hz). Tian and Sun 37 presented an adaptive control method to simplify the controller design and improve the performance of the rotor-HFMB system. The stiffness and equivalent viscous damping change with the excitation frequency.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical investigation of hybrid foil-magnetic bearings on operation mode and load sharing strategy

Zhang

Yin

Guan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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This paper presents a theoretical investigation on operation mode and load sharing strategy of hybrid foil-magnetic bearings (HFMBs). According to the inherent characteristics of gas foil bearings (GFBs) and active magnetic bearings (AMBs), six possible work scopes are discussed to understand the operation mode of HFMBs. A numerical model coupling the calculations of the film pressure in GFBs and the magnetic forces in AMBs is conducted to predict the operation performance of HFMBs. The accuracy of the model is proved by comparing the predicted and tested friction torques. Analysis on the static and dynamic performance of HFMBs within three representative cases is conducted by varying the load sharing ratio. The dynamic supporting stiffness and operation position of HFMBs can be obviously enhanced by adjusting the operating mode and load sharing strategy. Results show that the direct stiffness and dynamic damping of HFMBs adopting hybrid mode are significantly higher than those adopting AMB or GFB independent mode.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical investigation of hybrid foil-magnetic bearings on operation mode and load sharing strategy

Zhang

Yin

Guan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…Tian and Sun [30] presented an adaptive control method to simplify the controller design and improve the performance of the rotor-HFMB system. Jeong and Lee [31] used a control algorithm to reduce the sudden imbalance vibration amplitudes of a rigid rotor which was operated at up to 12,000rpm.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Investigation of Hybrid Foil-Magnetic Bearings on Operation Mode and Load Sharing Strategy

Feng¹,

Zhang²,

Yin³

et al. 2020

Preprint

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To guide the conceptual design of hybrid foil-magnetic bearings (HFMBs), this paper presents a theoretical investigation on operation mode and load sharing strategy. According to the inherent characteristics of GFBs and AMBs, seven possible work scopes are discussed to understand the operation mode of HFMBs. A numerical model coupling the calculations of the film pressure in GFBs and the magnetic forces in AMBs is conducted to predict the performance of HFMBs. The deflection of top foil and bumps is also included in the prediction model. The analysis, which is conducted for static and dynamic performance of HFMBs within three representative work scopes by varying the load sharing, uncovers the effects of the operation mode and load sharing strategy on bearing behavior. Results show that HFMBs performance including the supporting stiffness and stability can be obviously enhanced by adjusting the operating mode and load sharing strategy.

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“…However, with frequent start-up and shutdowns of the machines, the foils of the gas-dynamic foilbearings are subject to increased wear. This problem is solved by combination of a rolling-element bearing and the gasdynamic foil bearing, which allows to separate their work functions and achieve an optimal combination of useful properties of each type of bearings [1][2][3][4][5][6].The inclusion in the design of the hybrid bearing of various control and switching elements allows to control its characteristics [7][8][9]. One of the most important characteristics of the bearing unit is the load capacity [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Performance of the hybryd bearing with air-lubricated foil bearing and active control

Bondarenko¹,

Polyakov²,

Gorin³

2019

BALTTRIB

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many high-speed rotor units operate at supercritical frequencies, which means that undesirable oscillations inevitably occur during acceleration of the rotor to the operating frequency of rotation due to transition through these critical rotational frequencies. In addition, operating frequencies of the order of 100 000 revolutions per minute and more require new design and technological solutions that provide the specified indicators of speed, stability and wear of bearing surfaces. One of the ways to improve bearing units is to combine rolling and air-lubricated foil bearings into a hybrid bearing with active control, which improves the reliability and durability of the unit as a whole due to the separation and duplication of bearing functions in various operating modes. The article presents a general approach to the construction of a mathematical model of a hybrid bearing with active control and its performance.

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Nonlinear adaptive control for hybrid foil-magnetic bearing

Cited by 9 publications

References 8 publications

Theoretical investigation of hybrid foil-magnetic bearings on operation mode and load sharing strategy

Theoretical investigation of hybrid foil-magnetic bearings on operation mode and load sharing strategy

A Theoretical Investigation of Hybrid Foil-Magnetic Bearings on Operation Mode and Load Sharing Strategy

Performance of the hybryd bearing with air-lubricated foil bearing and active control

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