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Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 421-425 doi: 10.1007/s11465-008-0063-9

Abstract: an appropriate control method, linear ultrasonic motors can be used in applications requiring high positionaccuracy.In this paper, a closed loop PI control system is designed to achieve high position accuracy during theThe PI control algorithm is used to increase the stability and accuracy of position control.the control strategy proposed in this paper appears to have high efficiency, quick response, and high accuracy

Keywords： settling     position accuracy     PI control     control algorithm     orthogonal    

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Reliability analysis of kinematic accuracy for the elastic slider-crank mechanism

TUO Yaofei, CHEN Jianjun, ZHANG Chijiang, CHEN Yongqin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 214-217 doi: 10.1007/s11465-007-0037-3

Abstract: This paper deals with the static and dynamic output kinematic accuracy of a group of elastic slider-crankstatic and dynamic output kinematic errors are synthesized, and the reliability model of the kinematic accuracyThrough an example, a study of the influencing factors on the reliability of the output kinematic accuracymechanism becomes the principal factor that greatly affects the reliability of the output kinematic accuracy

Keywords： output kinematic     group     slider-crank     kinematic accuracy     displacement    

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Experimental and CFD analysis of nozzle position of subsonic ejector

Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 167-174 doi: 10.1007/s11708-009-0001-5

Abstract: The influence of nozzle position on the performance of an ejector was analyzed qualitatively with freeExperimental investigations and computational fluid dynamics (CFD) analysis of the nozzle position ofThe results show that there is an optimum nozzle position for the ejector.Moreover, the nozzle position of an ejector is not a fixed value, but is influenced greatly by the flow

Keywords： ejector     nozzle position     ejecting coefficient     CFD    

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Strategic position and development prospects of nuclear energy in China

SHEN Wenquan

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 125-128 doi: 10.1007/s11708-007-0015-9

Abstract: By analyzing the challenges of China s energy supply, an excellent perspective of nuclear power development in the country has been described. Taking into account the near-, mid-, and long-term development requirements, a comprehensive, coordinated and sustainable nuclear power program is proposed. Thus, our national nuclear industry can not only catch up with the world s advanced level in proper time, but also possess enough stamina for sustainability.

Keywords： development     excellent perspective     long-term development     comprehensive     national    

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Robust energy-efficient train speed profile optimization in a scenario-based position–time–speed network

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 595-614 doi: 10.1007/s42524-021-0173-1

Abstract: Specifically, we first construct a scenario-based position–time–speed (PTS) network by considering resistance

Keywords： robust train speed profile     percentile reliability model     scenario-based position–time–speed network    

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A hybrid deep learning model for robust prediction of the dimensional accuracy in precision milling of

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0688-0

Abstract: The use of artificial intelligence to process sensor data and predict the dimensional accuracy of machinedIn this study, we develop a predictive model of the dimensional accuracy for precision milling of thin-walledThe classification accuracy of the popular machine learning methods has been evaluated in comparisoncollected during the milling experiments, the proposed model proved to be capable of predicting dimensional accuracyThe average classification accuracy obtained using the proposed deep learning model was 9.55% higher

Keywords： precision milling     dimensional accuracy     cutting force     convolutional neural networks     coherent noise    

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Task-space position/attitude tracking control of FAST fine tuning system

QI Lin, ZHANG Hui, DUAN Guanghong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 392-399 doi: 10.1007/s11465-008-0056-8

Abstract: This paper addresses the task-space position/attitude tracking control of a suspended parallel robot,the quaternion algebra, a novel model-independent task-space PD controller that ensures end-effector position

Keywords： telescope     five-hundred     end-effector     controller     simulation    

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Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

Guangbo HAO,Haiyang LI,Suzen KEMALCAN,Guimin CHEN,Jingjun YU

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 129-134 doi: 10.1007/s11465-016-0392-z

Abstract: using nonlinear finite element analysis (FEA) to reflect coupled factors in affecting the modelling accuracy

Keywords： coupling factors     modelling accuracy     compliant mechanisms     equivalent modulus    

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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: characteristics including mode frequency, mode shape, and response amplitude are obviously changed with the positionThe combined optimization method is used to optimize the air-bearings position.The method can be generalized to the connection position of different components in manufacture elementsand to implement the system dynamic characteristics optimization when the connection position can be

Keywords： manufacture     different     interaction     air-bearings     response amplitude    

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Impact of crude distillation unit model accuracy on refinery production planning

Gang FU, Pedro A. Castillo CASTILLO, Vladimir MAHALEC

Frontiers of Engineering Management 2018, Volume 5, Issue 2,   Pages 195-201 doi: 10.15302/J-FEM-2017052

Abstract: In this work, we examine the impact of crude distillation unit (CDU) model errors on the results of refinery-wide optimization for production planning or feedstock selection. We compare the swing cut+ bias CDU model with a recently developed hybrid CDU model (Fu et al., 2016). The hybrid CDU model computes material and energy balances, as well as product true boiling point (TBP) curves and bulk properties (e.g., sulfur % and cetane index, and other properties). Product TBP curves are predicted with an average error of 0.5% against rigorous simulation curves. Case studies of optimal operation computed using a planning model that is based on the swing cut+ bias CDU model and using a planning model that incorporates the hybrid CDU model are presented. Our results show that significant economic benefits can be obtained using accurate CDU models in refinery production planning.

Keywords： impact of model accuracy on production planning     swing cut+ bias CDU model     hybrid CDU model     refinery feedstock    

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Initial position estimation strategy for a surface permanent magnet synchronous motor used in hybrid Article

Bing TIAN,Qun-tao AN,Li SUN,Dong-yang SUN,Jian-dong DUAN

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 8,   Pages 803-813 doi: 10.1631/FITEE.1500298

Abstract: model for surface permanent magnet synchronous motors (SPMSMs) is adopted to estimate the initial rotor positionUsually, the accuracy of initial rotor position estimation for SPMSMs relies on magnetic saturation.identified with the aid of the saturation evaluation function, based on which an estimation of the positionprocedure, a special demodulation is suggested to extract signals of iron core saturation and rotor position

Keywords： Surface permanent magnet synchronous motor (SPMSM)     Initial position estimation     Nonlinear model     Hybridinjection     Position observer    

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Comprehensive analysis of the influence of structural and dynamic parameters on the accuracy of nano-precision

Chengyuan LIANG, Fang YUAN, Xuedong CHEN, Wei JIANG, Lizhan ZENG, Xin LUO

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 255-272 doi: 10.1007/s11465-019-0538-x

Abstract: stage, which are determined by structural and dynamic parameters, exert a serious influence on the accuracyA systematic approach to modeling the dynamic accuracy of a nano-precision positioning stage is developedplane errors, foundation vibrations, and positions of the acting points of driving forces, on dynamic accuracy

Keywords： nano-precision positioning stage     analysis and design     structural and dynamic parameters     dynamic accuracy    

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Resource evaluation，position and distribution of tight sandstone gas in China

Zhang Guosheng ,Deng Songtao

Strategic Study of Chinese Academy of Engineering 2012, Volume 14, Issue 6,   Pages 87-93

Abstract:

Based on the reservoir forming condition research of tight sandstone gas in Ordos Basin, Sichuan Basin and Tarim Basin, the authors give two types of tight sandstone gas reservoirs,sloped lithologic type and structural type which are the main of tight sandstone gas reservoir. The favorable gas region is predicted with multi-factor overlay method. And based on the existed tight sandstone gas reservoir analysis, the authors get the main parameters such as reservoir abundance, gas-bearing area coefficient which are necessary for gas resource calculation of the large basin through analogism method. According to the result of this resource evaluation, the tight sandstone gas geological recoverable resource in China is 9.2×1012～13.4×1012 m3 which is widely distributed over coal measure basins. The tight sandstone gas is the most realistic source in present. Due to the support of government policies and the motivation of technological progress, it might become one of the pillar sources in natural gas development in 10 to 20 years.

Keywords： tight sandstone gas     distribution feature     resource potential     development position    

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Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 133-150 doi: 10.1007/s11465-020-0610-6

Abstract: Surface accuracy directly affects the surface quality and performance of mechanical parts.with traditional machining methods, additive manufacturing (AM) technology can decrease the surface accuracyHowever, an accuracy error may still exist on the surface of circular holes fabricated by AM due to theThis study proposes a surface accuracy optimization approach for mechanical parts with multiple circularoptimal AM part build orientation is determined using the genetic algorithm to optimize the surface accuracy

Keywords： surface accuracy optimization     multiple circular holes     additive manufacturing (AM)     part build orientation    

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Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 80-87 doi: 10.1007/s11465-013-0362-7

Abstract: gear transmissions developed by the authors is used to study the influence of carrier planet pin hole positionThe influence of carrier planet pin hole position errors on the planet load sharing is studied, and severalTangential and radial planet pin hole position errors are considered independently, and the effect of

Keywords： gear     planetary     epicyclic     transmission     load sharing     transmission error    

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Title Author Date Type Operation

Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Journal Article

Reliability analysis of kinematic accuracy for the elastic slider-crank mechanism

TUO Yaofei, CHEN Jianjun, ZHANG Chijiang, CHEN Yongqin

Journal Article

Experimental and CFD analysis of nozzle position of subsonic ejector

Xilai ZHANG, Shiping JIN, Suyi HUANG, Guoqing TIAN

Journal Article

Strategic position and development prospects of nuclear energy in China

SHEN Wenquan

Journal Article

Robust energy-efficient train speed profile optimization in a scenario-based position–time–speed network

Journal Article

A hybrid deep learning model for robust prediction of the dimensional accuracy in precision milling of

Journal Article

Task-space position/attitude tracking control of FAST fine tuning system

QI Lin, ZHANG Hui, DUAN Guanghong

Journal Article

Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

Guangbo HAO,Haiyang LI,Suzen KEMALCAN,Guimin CHEN,Jingjun YU

Journal Article

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

CHEN Xuedong, LI Zhixin

Journal Article

Impact of crude distillation unit model accuracy on refinery production planning

Gang FU, Pedro A. Castillo CASTILLO, Vladimir MAHALEC

Journal Article

Initial position estimation strategy for a surface permanent magnet synchronous motor used in hybrid

Bing TIAN,Qun-tao AN,Li SUN,Dong-yang SUN,Jian-dong DUAN

Journal Article

Comprehensive analysis of the influence of structural and dynamic parameters on the accuracy of nano-precision

Chengyuan LIANG, Fang YUAN, Xuedong CHEN, Wei JIANG, Lizhan ZENG, Xin LUO

Journal Article

Resource evaluation，position and distribution of tight sandstone gas in China

Zhang Guosheng ,Deng Songtao

Journal Article

Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

Journal Article

Planet position errors in planetary transmission: Effect on load sharing and transmission error

Miguel IGLESIAS, Alfonso FERNáNDEZ, Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA

Journal Article