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Model reduction techniques for dynamics analysis of ultra-precision linear stage

Xuedong CHEN, Zhixin LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 64-70 doi: 10.1007/s11465-009-0009-x

Abstract: The dynamics behavior is studied.The comparison between mode shapes from the eigenvalue analysis shows that the components, except thetranslator, can represent system dynamics characteristics.There is little difference between the vibration mode and the response analysis.The experimental modal analysis proves the validity of the reduction approach, which can be generalized

Keywords： dynamics analysis     air-bearing     linear stage     reduction    

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Nonlinear dynamics and analysis of a four-bar linkage with clearance

Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 160-168 doi: 10.1007/s11465-013-0258-6

Abstract:

In this paper, nonlinear dynamic behavior of a four-bar linkage considering clearance is studied. The dynamic model of the linkage with a clearance between coupler and rocker is developed firstly. Then the dynamic equations of this mechanism are solved by a numerical method. According to the calculated response, compliance, force and trajectory of pin in joint bearing are obtained. Effects of clearance magnitude and the relationship between a mechanism with clearance and without clearance are studied. By using Poincare Map, it is proved that strange attractors or chaos exist in the dynamic response. In addition, phenomena of chaos, periodic response and subharmonic response also can be found in the special condition. Bifurcation diagram is used to suggest that bifurcation and fractal phenomena exist in the dynamic response of this mechanism.

Keywords： four-bar linkage     chaos     bifurcation     strange attractors     dynamics    

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Modeling and analysis of landing collision dynamics for a shipborne helicopter

Dingxuan ZHAO, Haojie YANG, Carbone GIUSEPPE, Wenhang LI, Tao NI, Shuangji YAO

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 151-162 doi: 10.1007/s11465-020-0617-z

Abstract: A mechanism of sliding motion is built, and a real-time reliability analysis of the algorithm is implemented

Keywords： shipborne helicopter     landing model     Lagrange equations     dynamics     validation    

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Dynamics analysis of bladder-urethra system based on CFD

Qinghua JIN, Xiaojun ZHANG, Xiaoyang LI, Jianliu WANG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 336-340 doi: 10.1007/s11465-010-0027-8

Abstract: A mathematical model for a bladder-urethra system can provide basic analysis for the disabled urethraBased on computational fluid dynamics (CFD), we developed a three-dimensional urodynamic bladder-urethraonly improve urinary incontinence surgery for clinicians, but can also provide a basis for theoretical analysis

Keywords： bladder-urethra system     stress urinary incontinence (SUI)     computational fluid dynamics (CFD)     urodynamics    

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Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics

Zongxia JIAO,Tianyi WANG,Liang YAN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 351-362 doi: 10.1007/s11465-016-0407-9

Abstract: linear oscillating motor design and optimization is addressed in detail, including the electromagnetic, dynamicsFirst, the electromagnetic and dynamics characteristics are modeled to reveal the principle for optimizationThen, optimization and analysis on magnetic structure, resonant system, and thermal features are conducted

Keywords： linear oscillating motor     linear pump     magnetic field     motor optimization    

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Theory analysis and system identification methods on thermal dynamics characteristics of ballscrews

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 408-415 doi: 10.1007/s11465-008-0061-y

Abstract: Empirical model of machine tools on thermal error has been widely researched, which can compensate for thermal error to some extent but not suitable for thermal dynamic errors produced by dynamic heat sources. The thermoelastic phenomenon of unidimensional heat transfer of ballscrews influenced by changeable heat sources is analyzed based on the theory of heat transfer. Two methods for system identification (the least square system identification and BP artificial neural network (ANN) system identification) are put forward to establish a dynamic characteristic model of thermal deformation of ballscrews. The model of thermal error of the axis in a feed system of DM4600 vertical miller is established with a fine identification effect. Comparing the results of the two identification methods, the BP ANN system identification is more precise than the least square system identification.

Keywords： square system     network     vertical miller     transfer     ANN    

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Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 188-205 doi: 10.1007/s11709-013-0199-5

Abstract: It is possible to derive characteristics of the whole unknown dynamics of a structure using few dataof some geotechnical characteristic(s) of a dam and modern methods of time series linear/nonlinear analysisBesides, recently developed linear/nonlinear data analysis and prediction schemes may help to quantifyThe proposed real-time telemetric monitoring (DAMWATCH) complex and linear/nonlinear dynamical analysis

Keywords： real time monitoring     telemetry     dam tilts     diagnostic tools     hysteresis     nonlinear dynamics    

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Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Frontiers of Structural and Civil Engineering   Pages 915-934 doi: 10.1007/s11709-023-0907-8

Abstract: A parametric analysis is conducted to illustrate the influence of the model parameters on the pile dynamic

Keywords： fictitious soil pile     soil plug     pipe piles     high-strain dynamic analysis     one-dimensional wave theory     pile dynamics    

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Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 424-440 doi: 10.1007/s11708-016-0423-9

Abstract: A three-dimensional finite element analysis (FEA) based CFD technique for finding the spread of pressureThe results of CFD are mainly obtained to fine tune the thermal analysis.Thus, in this focus, a flow analysis assisted thermal analysis is presented to predict the steady stateThe vibration analysis is illustrated.Harmonic analysis such as sine sweep analysis to identify the range of speeds causing high vibrations

Keywords： flux reversal generator     air velocity     computation fluid dynamics     thermal analysis     vibration analysis     finiteelement analysis    

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract: In addition, a computational fluid dynamics (CFD) method based on Fluent was conducted to verify the

Keywords： direct drive rotary valve     computational fluid dynamics (CFD)     flow regulation    

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Nonlinear dynamic analysis for elastic robotic arms

M. H. KORAYEM, H. N. RAHIMI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 219-228 doi: 10.1007/s11465-011-0218-y

Abstract:

The aim of the paper is to analyze the nonlinear dynamics of robotic arms with elastic links and joints

Keywords： robotic arms     elastic link     elastic joint     nonlinear dynamics     optimal control    

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Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluiddynamics: Mathematical and modelling aspects of porous media

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 399-409 doi: 10.1007/s11705-020-1934-9

Abstract: Description of electrolyte fluid dynamics in the electrode compartments by mathematical models can be

Keywords： CFD simulation     porous media     porous electrode     pressure drop     redox flow battery    

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Computational fluid dynamics simulation of aerosol transport and deposition

Yingjie TANG, Bing GUO

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 362-377 doi: 10.1007/s11783-011-0365-8

Abstract: In this article computational fluid dynamics (CFD) simulation of aerosol transport and deposition, i.e

Keywords： computational fluid dynamics (CFD)     aerosol     transport     deposition    

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Microbial community structure and dynamics of starch-fed and glucose-fed chemostats during two years

Min GOU,Jing ZENG,Huizhong WANG,Yueqin TANG,Toru SHIGEMATSU,Shigeru MORIMURA,Kenji KIDA

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 368-380 doi: 10.1007/s11783-015-0815-9

Abstract: The microbial community structures of two mesophilic anaerobic chemostats, one fed with glucose, the other with starch as sole carbon sources, were studied at various dilution rates (0.05–0.25 d for glucose and 0.025–0.1 d for starch) during two years continuous operation. In the glucose-fed chemostat, the aceticlastic methanogen spp. and hydrogenotrophic methanogen spp. predominated at low dilution rates, whereas spp. and the hydrogenotrophic spp. predominated together when dilution rates were greater than 0.1 d . Bacteria affiliated with the phyla Bacteroidetes, Spirochaetes, and Actinobacteria predominated at dilution rates of 0.05, 0.1, and 0.15 d , respectively, while Firmicutes predominated at higher dilution rates (0.2 and 0.25 d ). In the starch-fed chemostat, the aceticlastic and hydrogenotrophic methanogens coexisted at all dilution rates. Although bacteria belonging to only two phyla were mainly responsible for starch degradation (Spirochaetes at the dilution rate of 0.08 d and Firmicutes at other dilution rates), different bacterial genera were identified at different dilution rates. With the exception of Archaea in the glucose-fed chemostat, the band patterns revealed by denaturing gradient gel electrophoresis (DGGE) of the microbial communities in the two chemostats displayed marked changes during long-term operation at a constant dilution rate. The bacterial community changed with changes in the dilution rate, and was erratic during long-term operation in both glucose-fed and starch-fed chemostats.

Keywords： community     glucose degradation     starch degradation     dilution rate     continuous methane fermentation     phylogenetic analysis    

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Recent developments in passive interconnected vehicle suspension

Wade A. SMITH, Nong ZHANG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 1-18 doi: 10.1007/s11465-009-0092-z

Abstract: description is provided of a recently proposed multidisciplinary approach for the frequency-domain analysisThe experimental validation and applications of the method to both free and forced vibration analysisA finite-element-method-based approddach for modelling the transient dynamics of an HIS vehicle is also

Keywords： interconnected suspensions     rollover prevention     vehicle dynamics     ride comfort     multibody system dynamics     hydraulic system dynamics    

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Title Author Date Type Operation

Model reduction techniques for dynamics analysis of ultra-precision linear stage

Xuedong CHEN, Zhixin LI

Journal Article

Nonlinear dynamics and analysis of a four-bar linkage with clearance

Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU

Journal Article

Modeling and analysis of landing collision dynamics for a shipborne helicopter

Dingxuan ZHAO, Haojie YANG, Carbone GIUSEPPE, Wenhang LI, Tao NI, Shuangji YAO

Journal Article

Dynamics analysis of bladder-urethra system based on CFD

Qinghua JIN, Xiaojun ZHANG, Xiaoyang LI, Jianliu WANG,

Journal Article

Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics

Zongxia JIAO,Tianyi WANG,Liang YAN

Journal Article

Theory analysis and system identification methods on thermal dynamics characteristics of ballscrews

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Journal Article

Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Journal Article

Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Journal Article

Flow, thermal, and vibration analysis using three dimensional finite element analysis for a flux reversal

B. VIDHYA,K. N. SRINIVAS

Journal Article

Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Journal Article

Nonlinear dynamic analysis for elastic robotic arms

M. H. KORAYEM, H. N. RAHIMI

Journal Article

Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluiddynamics: Mathematical and modelling aspects of porous media

Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas

Journal Article

Computational fluid dynamics simulation of aerosol transport and deposition

Yingjie TANG, Bing GUO

Journal Article

Microbial community structure and dynamics of starch-fed and glucose-fed chemostats during two years

Min GOU,Jing ZENG,Huizhong WANG,Yueqin TANG,Toru SHIGEMATSU,Shigeru MORIMURA,Kenji KIDA

Journal Article

Recent developments in passive interconnected vehicle suspension

Wade A. SMITH, Nong ZHANG,

Journal Article