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Application of Porous Aerostatic Bearings in Three-axis Table

Du Jinming

Strategic Study of CAE 2005, Volume 7, Issue 1,   Pages 65-68

Abstract:

Aerostatic bearings have been applied widely in aviation, aerospace and precision electronics.Porous aerostatic bearings have higher load capacity, static stiffness and highed damping than otherThe paper presents theoretical analysis of porous aerostatic bearings and compares them with orificeaerostatic bearings.The results show the load capacity of porous aerostatic bearings is higher than orifice aerostatic bearings

Keywords： aerostatic bearings     porous     orifice restricted     three-axis table    

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Rolling-element bearings in China: From ancient times to the 20th century

Lie SUN,Ang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1,   Pages 33-43 doi: 10.1007/s11465-016-0373-2

Abstract:

The development of rolling-element bearings in China has spanned a long period.several typical and important cases, the present article reconstructs the history of rolling-element bearingsin China by dividing it into four stages according to the various characteristics of the bearings.The first stage represents the origin of rolling bearings in China, which remains controversial becauseas replacement for traditional sliding bearings.

Keywords： bearing movement     rolling-element bearing     China     early rolling bearings     technology transfer    

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Experimental study of aerodynamic interference effects on aerostatic coefficients of twin deck bridges

Zhiwen LIU , Zhengqing CHEN , Gao LIU , Xinpeng SHAO ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 292-298 doi: 10.1007/s11709-009-0048-8

Abstract: The aerodynamic interference effects on aerostatic coefficients of twin deck bridges with large spanangles were changed during the wind tunnel test to study the effects on aerodynamic interferences of aerostatic

Keywords： twin decks     aerodynamic interference effects     aerostatic coefficients     wind tunnel test    

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Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges

Zhang Xinjun and Sun Hailing

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 50-58

Abstract: Three-dimensional nonlinear aerostatic and aerodynamic stability analysis of long-span bridges is usedto investigate the aerostatic and aerodynamic stability of a super long- span cable- stayed bridge withIn addition，parametric analysis on the aerostatic and aerodynamic stability of super long-span cable-stayed

Keywords： super long-span cable-stayed bridge     aerostatic stability     aerodynamic stability     design parameter    

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Design of Microstructure Parameters on a Small Multi-Throttle Aerostatic Guideway in Photolithography Article

Zhongpu Wen,  Jianwei Wu,  Kunpeng Xing, Yin Zhang,  Jiean Li,  Jiubin Tan

Engineering 2021, Volume 7, Issue 2,   Pages 226-237 doi: 10.1016/j.eng.2019.09.012

Abstract:

A compact multi-throttle aerostatic guideway is the preferred structure for high precision and acceleration

Keywords： Photolithography     Multi-throttle aerostatic guideway     Microstructure     Working point     Rotational stiffness    

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Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue

Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4,   Pages 434-441 doi: 10.1007/s11465-018-0474-1

Abstract: Wind turbine gearbox bearings fail with the service life is much shorter than the designed life.Gearbox bearings are subjected to rolling contact fatigue (RCF) and they are observed to fail due to

Keywords： rolling contact fatigue (RCF)     white etching area (WEA)     white etching crack (WEC)     adiabatic shear band (ASB)    

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Dynamical Experiment Research on New Seismic Isolation Bearings with SMA Wires

Deng Zongcai,Sun Hongjun,Liu Chunguo,Niu Kun,Deng Hongliang

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 61-68

Abstract:

As the aim of improving the utilization ratio of SMAs in SMA-rubber seismic isolation bearings, severaldifferent SMA-rubber seismic isolation bearings were designed, and energy dissipation experiments werethe level stiffness, energy dissipation and equivalent damping ratio of SMA-rubber seismic isolation bearingsResult showed that the new SMA-rubber seismic isolation bearings have better hysteresis and energy dissipationIt provided the base to optimize the SMA-rubber seismic isolation bearings.

Keywords： shape memory alloy     seismic isolation bearings     initial stiffness     hysteresis energy dissipation     equivalent    

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tree-inspired network: a decision-tree-structured neural network for hierarchical fault diagnosis of bearings

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 814-828 doi: 10.1007/s11465-021-0650-6

Abstract: The fault diagnosis of bearings is crucial in ensuring the reliability of rotating machinery.that is, the deep convolutional tree-inspired network (DCTN), for the hierarchical fault diagnosis of bearings

Keywords： bearing     cross-severity fault diagnosis     hierarchical fault diagnosis     convolutional neural network     decision tree    

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Air-bearing position optimization based on dynamic characteristics of ultra-precision linear stages

CHEN Xuedong, LI Zhixin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 400-407 doi: 10.1007/s11465-008-0060-z

Abstract: Air-bearings are installed between the stator and the mover of ultra-precision linear stages to suppressincluding mode frequency, mode shape, and response amplitude are obviously changed with the position of air-bearingsThe combined optimization method is used to optimize the air-bearings position.

Keywords： manufacture     different     interaction     air-bearings     response amplitude    

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Emerging and Innovative Materials for Hydropower Engineering Applications: Turbines, Bearings, Sealing Review

Emanuele Quaranta, Peter Davies

Engineering 2022, Volume 8, Issue 1,   Pages 148-158 doi: 10.1016/j.eng.2021.06.025

Abstract: described here based on the following categories: novel materials for turbines, dams and waterways, bearings

Keywords： Bearing     Composite     Dam     Hydropower     Material     Ocean     Seal     Turbine    

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Experimental and theoretical investigations of the lateral vibrations of an unbalanced Jeffcott rotor

Ali ALSALEH, Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 1024-1032 doi: 10.1007/s11709-020-0647-y

Abstract: The current work experimentally explores and then theoretically examines the lateral vibrations of an unbalanced Jeffcott rotor-system working at several unbalance conditions. To this end, three conditions of eccentric masses are considered by using a Bently Nevada RK-4 rotor kit. Measurements of the steady-state as well as the startup data at rigid and flexible rotor states are captured by conducting a setup that mimics the vibration monitoring industrial practices. The linear governing equation of the considered rotor is extracted by adopting the Lagrange method on the basis of rigid rotor assumptions to theoretically predict the lateral vibrations. The dynamic features of the rotor system such as the linearized bearing induced stiffness are exclusively acquired from startup data. It is demonstrated that, with an error of less than 5%, the proposed two-degrees-of-freedom model can predict the flexural vibrations at rigid condition. While at flexible condition, it fails to accurately predict the dynamic response. In contrast to the other works where nonlinear mathematical models with some complexities are proposed to mathematically model the real systems, the present study illustrates the applicability of employing simple models to predict the dynamic response of a real rotor-system with an acceptable accuracy.

Keywords： rotor-dynamics     Jeffcott rotor     lateral vibrations     Lagrange method     system-equivalent stiffness     sleeve bearings    

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Model-free adaptive control for three-degree-of-freedom hybrid magnetic bearings Article

Ye YUAN, Yu-kun SUN, Qian-wen XIANG, Yong-hong HUANG, Zhi-ying ZHU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2035-2045 doi: 10.1631/FITEE.1700324

Abstract: The rotor start-of-suspension position of the HMB is regulated by auxiliary bearings with different inner

Keywords： Model-free adaptive control     Hybrid magnetic bearings     Nonlinear areas     Faster response     Higher stability    

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Onrobustness of anAMBsuspended energy storage flywheel platform under characteristicmodel based all-coefficient adaptive control laws None

Xujun LYU, Long DI, Zongli LIN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 120-130 doi: 10.1631/FITEE.1800606

Abstract: implemented on an experimental test rig for high-speed energy storage flywheels suspended on magnetic bearings

Keywords： Intelligent control     Robustness     Uncertainty     Disturbance rejection     Active magnetic bearings     Energy storage    

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Disturbance rejection via iterative learning controlwith a disturbance observer for active magnetic bearing systems None

Ze-zhi TANG, Yuan-jin YU, Zhen-hong LI, Zheng-tao DING

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 131-140 doi: 10.1631/FITEE.1800558

Abstract:

Although standard iterative learning control (ILC) approaches can achieve perfect tracking for active magnetic bearing (AMB) systems under external disturbances, the disturbances are required to be iteration-invariant. In contrast to existing approaches, we address the tracking control problem of AMB systems under iteration-variant disturbances that are in different channels from the control inputs. A disturbance observer based ILC scheme is proposed that consists of a universal extended state observer (ESO) and a classical ILC law. Using only output feedback, the proposed control approach estimates and attenuates the disturbances in every iteration. The convergence of the closed-loop system is guaranteed by analyzing the contraction behavior of the tracking error. Simulation and comparison studies demonstrate the superior tracking performance of the proposed control approach.

Keywords： Active magnetic bearings (AMBs)     Iterative learning control (ILC)     Disturbance observer    

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Title Author Date Type Operation

Application of Porous Aerostatic Bearings in Three-axis Table

Du Jinming

Journal Article

Rolling-element bearings in China: From ancient times to the 20th century

Lie SUN,Ang LI

Journal Article

Experimental study of aerodynamic interference effects on aerostatic coefficients of twin deck bridges

Zhiwen LIU , Zhengqing CHEN , Gao LIU , Xinpeng SHAO ,

Journal Article

Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges

Zhang Xinjun and Sun Hailing

Journal Article

Design of Microstructure Parameters on a Small Multi-Throttle Aerostatic Guideway in Photolithography

Zhongpu Wen,  Jianwei Wu,  Kunpeng Xing, Yin Zhang,  Jiean Li,  Jiubin Tan

Journal Article

Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue

Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE

Journal Article

Dynamical Experiment Research on New Seismic Isolation Bearings with SMA Wires

Deng Zongcai,Sun Hongjun,Liu Chunguo,Niu Kun,Deng Hongliang

Journal Article

tree-inspired network: a decision-tree-structured neural network for hierarchical fault diagnosis of bearings

Journal Article

Air-bearing position optimization based on dynamic characteristics of ultra-precision linear stages

CHEN Xuedong, LI Zhixin

Journal Article

Emerging and Innovative Materials for Hydropower Engineering Applications: Turbines, Bearings, Sealing

Emanuele Quaranta, Peter Davies

Journal Article

Experimental and theoretical investigations of the lateral vibrations of an unbalanced Jeffcott rotor

Ali ALSALEH, Hamid M. SEDIGHI, Hassen M. OUAKAD

Journal Article

Model-free adaptive control for three-degree-of-freedom hybrid magnetic bearings

Ye YUAN, Yu-kun SUN, Qian-wen XIANG, Yong-hong HUANG, Zhi-ying ZHU

Journal Article

Onrobustness of anAMBsuspended energy storage flywheel platform under characteristicmodel based all-coefficient adaptive control laws

Xujun LYU, Long DI, Zongli LIN

Journal Article

Disturbance rejection via iterative learning controlwith a disturbance observer for active magnetic bearing systems

Ze-zhi TANG, Yuan-jin YU, Zhen-hong LI, Zheng-tao DING

Journal Article