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Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 233-241 doi: 10.1007/s11465-010-0014-0

Abstract: Based on the theory of heat transfer, the transfer function between the thermal deformation of any pointBy solving the amplitude-frequency characteristics and phase-frequency characteristics of the transferfunction, the steady-state response of thermal deformation of the ballscrew is obtained, and the thermalby and large accord with the theoretical analyzing result, which shows that the method of transfer functionis correct and valid in solving the steady-state response of thermal deformation.

Keywords： ballscrew     Laplace transform     transfer function     thermal dynamic characteristics    

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Theory and method of mechanism system design

Huijun ZOU, Qinghua LIANG, Qing ZHANG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 399-411 doi: 10.1007/s11465-010-0116-8

Abstract: Specifically, for conceptual design of mechanical products, this paper presents a novel function solvingmodel for mechanical product design and highlights the importance of systematic synthesis to achieveThen it builds a framework as a function-effect-process-action- mechanisms (FEPAM) mapping process, which

Keywords： mechanism system creative design     process model     function solving model     process action procedure     mechanisms    

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Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0689-z

Abstract: unacceptable computational cost of inferring the input fault parameters for the observed output or solvingthe inverse problem of the physical model.The presented work develops a surrogate-model-assisted method for solving the nonlinear inverse problemin limited physical model evaluations.routine that benefits from the rapidity of the surrogate models and the reliability of the physical model

Keywords： surrogate model     gas face seal     fault diagnosis     nonlinear dynamics     tribology    

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Developing a new model for simultaneous scheduling of two grand projects based on game theory and solvingthe model with Benders decomposition

Loghman PIRI, Vahidreza GHEZAVATI, Ashkan HAFEZALKOTOB

Frontiers of Engineering Management 2022, Volume 9, Issue 1,   Pages 117-134 doi: 10.1007/s42524-020-0115-3

Abstract: In this study, a mixed-integer programming model consisting of game theory and project scheduling isIn this model, two contractors in successive periods are entered into a step-by-step competition by theThis model can act dynamically in all circumstances during project implementation.Then, the results of our model are compared with those of the conventional models.The projects’ duration in our model is reduced by 22.2%.

Keywords： project scheduling     resource leveling between projects     constrained resources     game theory     Benders decomposition    

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Predictor-corrector algorithm for solving quasi-separated-flow and transient distributed-parameter model

Ping ZHANG, Guoliang DING

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 535-541 doi: 10.1007/s11708-010-0113-y

Abstract: stitution (SS) method is a suitable approach to solving the transient distributed-parameter model for

Keywords： algorithm     convergence     heat exchanger     modeling     transient    

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Function and principle innovative design of mechanical products based on TRIZ/FA

YUAN Feng, WANG Tai-yong, NIE Hui-juan

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 350-355 doi: 10.1007/s11465-006-0031-1

Abstract: Function and principle innovation is the ultimate innovation of a product.To achieve Function and principle innovation design of mechanical products, a new process model of functionand principle solving is proposed, based on TRI

Keywords： TRI     principle solving     product     principle innovation     ultimate innovation    

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Design and evaluation of a novel biopsy needle with hemostatic function

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0738-7

Abstract: A predictive model for puncture force and tip deflection based on coupled Eulerian–Lagrangian (CEL) methodThe CEL model accurately predicts the peak of puncture force and produces close estimation of the insertion

Keywords： cancer diagnosis     biopsy needle     hemostatic function     predictive model     coupled Eulerian−Lagrangian    

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New model of load transfer function for pile analysis based on disturbed state model

LIU Qijian, YANG Linde, WU Jun

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 443-447 doi: 10.1007/s11709-007-0060-9

Abstract: Based on the disturbed state concept (DSC), a new model of load transfer function for pile analysis isIn the model, shear intensity of elements in an intact state are simulated by Duncan-Zhang model andThe model of this paper has few parameters, which can reflect the aspects of load transfer function,The well agreement between the in-situ data and the predicted shows that the validity of the model hereinSo the proposed model in this paper is easy to be used in engineering practice.

Keywords： hardening     homogenization     displacement     engineering     Duncan-Zhang    

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Solving multi-objective optimal power flow problem considering wind-STATCOM using differential evolution

Belkacem MAHDAD, K. SRAIRI

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 75-89 doi: 10.1007/s11708-012-0222-x

Abstract: In this paper, a simple strategy based differential evolution was proposed for solving the problem ofmulti-objective environmental optimal power flow considering a hybrid model (Wind-Shunt-FACTS).The proposed strategy was examined and applied to the standard IEEE 30-bus with smooth cost functionsolve the problem of security environmental economic dispatch considering multi distributed hybrid model

Keywords： differential evolution     multi-objective function     optimal power flow     economic dispatch     valve point effect    

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Iteration framework for solving mixed lubrication computation problems

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 635-648 doi: 10.1007/s11465-021-0632-8

Abstract: The general discrete scheme of time-varying Reynolds equation loses the information of the previous step, which makes it unreasonable. A discretization formula of the Reynolds equation, which is based on the Crank–Nicolson method, is proposed considering the physical message of the previous step. Gauss–Seidel relaxation and distribution relaxation are adopted for the linear operators of pressure during the numerical solution procedure. In addition to the convergent criteria of pressure distribution and load, an estimation framework is developed to investigate the relative error of the most important term in the Reynolds equation. Smooth surface with full contacts and mixed elastohydrodynamic lubrication is tested for validation. The asperity contact and sinusoidal wavy surface are examined by the proposed discrete scheme. Results show the precipitous decline in the boundary of the contact area. The relative error suggests that the pressure distribution is reliable and reflects the accuracy and effectiveness of the developed method.

Keywords： mixed lubrication     discretization formula     relative error     Reynolds equation     asperity    

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A rate-dependent Prandtl-Ishlinskii model for piezoelectric actuators using the dynamic envelope function

Meiju YANG,Chunxia LI,Guoying GU,Limin ZHU

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 37-42 doi: 10.1007/s11465-015-0326-1

Abstract:

In this paper, a novel rate-dependent Prandtl-Ishlinskii (P-I) model is proposed to characterize theThe new model is based on a modified rate-dependent play operator, in which a dynamic envelope functionis introduced to replace the input function of the classical play operator.Moreover, a dynamic density function is utilized in the proposed P-I model.The experimental results show that the developed rate-dependent P-I model precisely characterize the

Keywords： piezoelectric actuators     hysteresis     Prandtl-Ishlinskii     rate-dependent    

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Review of human–robot coordination control for rehabilitation based on motor function evaluation

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0684-4

Abstract: As a wearable and intelligent system, a lower limb exoskeleton rehabilitation robot can provide auxiliary rehabilitation training for patients with lower limb walking impairment/loss and address the existing problem of insufficient medical resources. One of the main elements of such a human–robot coupling system is a control system to ensure human–robot coordination. This review aims to summarise the development of human–robot coordination control and the associated research achievements and provide insight into the research challenges in promoting innovative design in such control systems. The patients’ functional disorders and clinical rehabilitation needs regarding lower limbs are analysed in detail, forming the basis for the human–robot coordination of lower limb rehabilitation robots. Then, human–robot coordination is discussed in terms of three aspects: modelling, perception and control. Based on the reviewed research, the demand for robotic rehabilitation, modelling for human–robot coupling systems with new structures and assessment methods with different etiologies based on multi-mode sensors are discussed in detail, suggesting development directions of human–robot coordination and providing a reference for relevant research.

Keywords： human–robot coupling     lower limb rehabilitation     exoskeleton robot     motor assessment     dynamical model    

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Isogeometric analysis based on geometric reconstruction models

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 782-797 doi: 10.1007/s11465-021-0648-0

Abstract: The CAD model is represented by boundary polygons or point cloud and is embedded into a regular backgroundgrid, and a model reconstruction method is proposed to obtain the level set function of the approximatemodel, which can be directly used in IGA.

Keywords： isogeometric analysis     reconstruction model     level set function     trimmed element     point cloud    

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A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 351-357 doi: 10.1007/s11708-013-0254-x

Abstract: The zone model has been widely applied in control analysis of heating, ventilation and air conditioningThis paper proposed a modified zone model which is much simpler in the HVAC system simulation and hasthe similar accuracy to the complicated simulation model.building enclosure was developed based on the building thermal network analytical theory and transfer functionThe efficacy of the proposed model was demonstrated by comparing it with the complicated model — heat

Keywords： room model     thermal network analysis     transfer function     heating     ventilation and air conditioning (HVAC)    

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Exponential polynomial uniform splines model

Zhao Yanli,Ping Ping,Liu Fengyu

Strategic Study of CAE 2008, Volume 10, Issue 7,   Pages 147-152

Abstract:

 A new model of k( k ≥ 3) order exponential polynomial uniformspline is given.Most of its properties similar to those of the B - spline model, and also it has anThe new model can be applied to the field of CAD/CAM.

Keywords： exponential polynomial uniform spline function     uniform B - spline function     shape parameter    

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Title Author Date Type Operation

Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Journal Article

Theory and method of mechanism system design

Huijun ZOU, Qinghua LIANG, Qing ZHANG

Journal Article

Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Journal Article

Developing a new model for simultaneous scheduling of two grand projects based on game theory and solvingthe model with Benders decomposition

Loghman PIRI, Vahidreza GHEZAVATI, Ashkan HAFEZALKOTOB

Journal Article

Predictor-corrector algorithm for solving quasi-separated-flow and transient distributed-parameter model

Ping ZHANG, Guoliang DING

Journal Article

Function and principle innovative design of mechanical products based on TRIZ/FA

YUAN Feng, WANG Tai-yong, NIE Hui-juan

Journal Article

Design and evaluation of a novel biopsy needle with hemostatic function

Journal Article

New model of load transfer function for pile analysis based on disturbed state model

LIU Qijian, YANG Linde, WU Jun

Journal Article

Solving multi-objective optimal power flow problem considering wind-STATCOM using differential evolution

Belkacem MAHDAD, K. SRAIRI

Journal Article

Iteration framework for solving mixed lubrication computation problems

Journal Article

A rate-dependent Prandtl-Ishlinskii model for piezoelectric actuators using the dynamic envelope function

Meiju YANG,Chunxia LI,Guoying GU,Limin ZHU

Journal Article

Review of human–robot coordination control for rehabilitation based on motor function evaluation

Journal Article

Isogeometric analysis based on geometric reconstruction models

Journal Article

A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Journal Article

Exponential polynomial uniform splines model

Zhao Yanli,Ping Ping,Liu Fengyu

Journal Article