Air bearing: academic insights and trend analysis

Chen, Guoda; Ju, Bing‐Feng; Fang, Hui; Chen, Yijie; Yu, Nan; Wan, Yuehua

doi:10.1007/s00170-019-04663-5

Cited by 29 publications

(12 citation statements)

References 67 publications

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“…Many scholars had published bibliometric analyses on the most-cited papers in a specialty field. [ 106 – 109 ] In this study, we also used this indicator of an article to reflect the hotspots of “income and CVD” research. The top 10 most cited publications were listed in Table 5 .…”

Section: Resultsmentioning

confidence: 99%

A bibliometric analysis of income and cardiovascular disease

et al. 2020

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Background: Income is 1 of the socio-economic indicators and could directly influence the health outcomes of cardiovascular disease (CVD). The relationship between income and CVD has attracted more and more scholars’ attention in the past 20 years. Methods: To study the current research dynamics of this field, a bibliometric analysis was conducted to evaluate the publications from 1990 to 2018 based on the Science Citation Index Expanded database. By using the Derwent Date Analyzer software, the following aspects were explored: historical trend of the topic; the main contributor: leading countries, leading institutions, leading research areas and journals; representative authors; most frequently used keywords; most cited papers. Results: The USA ranked first in this field, followed by UK and Canada in terms of number of publications. As for institutions, Harvard University took the leading place in the number of publications, as well as the h-index. Plos One had the most publications and “health” was the most frequent used keyword. The leading research area was “public environmental occupational health”. Conclusions: In conclusion, the elderly, the children and the puerpera were the main study population in this field and “disease prevention” was the main study direction. The most concerned health issues in this field were “obesity” and “diet”. There might be a lack of articles that explore the associations between income and CVD with a global perspective. Articles on this content are urgently warranted.

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Section: Resultsmentioning

confidence: 99%

A bibliometric analysis of income and cardiovascular disease

et al. 2020

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“…The residual magnetic flux density of permanent magnets is set to 1 T, and the magnetic poles alternates on the circumference. The rotor speed is set as the form of rotating angle (ω/60•time), the three-phase alternating currents are (A: 6 Figure 5a,b shows the flux density of the motor at 0.02 s with 0% eccentricity (It should be noted that the rotor eccentricity represents the eccentricity at the air journal bearing rather than the motor) and 50% eccentricity, respectively, it can be seen that the both the minimum and the maximum flux density of the motor increased when the rotor is eccentric. By integrating the flux density along the surface of the rotor, the UMF can be obtained.…”

Section: Simulation Of the Pmsm Modelmentioning

confidence: 99%

“…The air bearing motorized spindle is commonly equipped in the ultra-precision machine, in which the rotor shaft is directly driven by usually a permanent magnet synchronous motor (PMSM) and supported by the air journal bearing [1][2][3][4]. Due to its compact structure, high efficiency, pollution free, high precision and other advantages, extensive studies of the ABMS have been conducted in the past few decades, which mainly focus on the dynamic characteristic of air journal bearing [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Multi-Physics Fields Based Nonlinear Dynamic Behavior Analysis of Air Bearing Motorized Spindle

Chen

et al. 2020

Micromachines

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The air bearing motorized spindle (ABMS) is the key component of the ultra-precision machine tool, which plays an important role in the ultra-precision machining process and directly influences machining accuracy. The influence of unbalanced magnetic force (UMF) on the nonlinear dynamic behavior of the ABMS is not understood clearly. To reveal the potential influence of the UMF, a mathematical model of the ABMS considering multiphysics fields is established. The variation trend of the UMF is simulated, and the nonlinear dynamic behavior of the ABMS is analyzed which emphasizes on the stability of the rotating shaft. It is shown that the UMF varies linearly at large rotor eccentricity which meets well with previous research, but it is noteworthy the UMF varies nearly to a quadratic function at small rotor eccentricity. The result of rotor dynamics shows that the UMF can change the converge position of the rotor center and the converge speed. Moreover, when at certain rotor mass and external load, the UMF can enlarge the stability boundary of the rotor. This research provides an example of analyzing the nonlinear dynamic behavior of the ABMS considering multiphysics fields which may help to the further investigation.

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“…The aerostatic spindle plays a key role in an ultra-precision machine tool in the nano-precision machining, which directly affects the machining quality [ 1 , 2 ]. Generally, the shaft of the aerostatic spindle is directly driven by a permanent magnet synchronous motor (PMSM) and supported by the aerostatic bearing, including the journal bearing and the thrust bearing [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Multi-Field Coupling Dynamics Modeling of Aerostatic Spindle

Chen

2021

Micromachines

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The aerostatic spindle in the ultra-precision machine tool shows the complex multi-field coupling dynamics behavior under working condition. The numerical investigation helps to better understand the dynamic characteristics of the aerostatic spindle and improve its structure and performance with low cost. A multi-field coupling 5-DOF dynamics model for the aerostatic spindle is proposed in this paper, which considers the interaction between the air film, spindle shaft and the motor. The restoring force method is employed to deal with the times varying air film force, the transient Reynolds equation of the aerostatic journal bearing and the aerostatic thrust bearing is solved using ADI method and Thomas method. The transient air film pressure of aerostatic bearings is obtained which clearly presents the influence induced by the tilt motion of the spindle shaft. The motion trajectory of the spindle shaft is obtained which shows different stability of the shaft under different external forces. The dynamics model shows good performance on simulating the multi-field coupling behavior of the aerostatic spindle under external force. which is quite meaningful and useful for the further research on the dynamic characteristics of the aerostatic spindle.

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Air bearing: academic insights and trend analysis

Cited by 29 publications

References 67 publications

A bibliometric analysis of income and cardiovascular disease

A bibliometric analysis of income and cardiovascular disease

Multi-Physics Fields Based Nonlinear Dynamic Behavior Analysis of Air Bearing Motorized Spindle

Multi-Field Coupling Dynamics Modeling of Aerostatic Spindle

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