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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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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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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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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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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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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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XB High Accuracy Rocket Sled Test Track

Yang Xingbang

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 98-104

Abstract: China has successfully built the world ´s only track —XB high accuracy rocket sled test track

Keywords： rocket sled     test track     ground dynamic simulating test    

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A feasibility study of the measuring accuracy and capability of wireless sensor networks in tunnel monitoring

Xiaojun LI, Zhong JI, Hehua ZHU, Chen GU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 111-120 doi: 10.1007/s11709-012-0150-1

Abstract: Fire disasters and the deterioration of tunnel structures are major concerns for tunnel operation and maintenance. Traditional wired monitoring systems have many drawbacks in terms of installation time, overall cost, and flexibility in tunnel environments. In recent years, there has been growing interest in the use of wireless sensor networks (WSNs) for the monitoring of various structural monitoring applications. This paper evaluated the feasibility of applying a WSN in the monitoring of tunnels. The monitoring requirements of tunnels under explosion and combustion fire scenarios are analyzed using numerical simulation, and the maximum possible distance for temperature sensors is derived. The displacement monitoring of tunnels using an inclinometer is investigated. It is recommended that the inclinometer should be installed in the 1/4 span of the tunnel structure. The maximum wireless transmission distances in both outdoor and tunnel environments were examined. The influences of surface materials and sensor node locations on the data transmission distance in tunnel environments were also investigated. The experimental results show that the data loss in tunnel environments is approximately three times that in outdoor environments. Surface material has a considerable influence on the transmission distance of radio signals. The distance is 25 ? 28 m for a raw concrete surface, 20 m for a brick surface, and 36 m for a terrazzo surface. The transmission distances along the middle of quarter points are approximately 0.9 ( is the transmission distance in the center of the tunnel), and the relative error is less than±3%. The transmission distances at different locations along the bottom exhibit significant differences, decreasing from the middle to the corner point, with distances of approximately 0.8 at the quarter points and minimum distances of approximately 0.55 at the corner points.

Keywords： wireless sensor network (WSN)     tunnel     monitoring     feasibility study    

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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: appropriate control method, linear ultrasonic motors can be used in applications requiring high position accuracyIn 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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XFEM schemes for level set based structural optimization

Li LI, Michael Yu WANG, Peng WEI

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 335-356 doi: 10.1007/s11465-012-0351-2

Abstract: with partition integral method are developed and numerical examples are employed to evaluate their accuracyFurthermore, the methods for improving the computational accuracy and efficiency of XFEM are studied,Numerical examples show that the XFEM scheme without quadrature sub-cells can yield similar accuracyprominently reducing the time cost and that higher order XFEM elements can improve the computational accuracy

Keywords： structural optimization     level set method     extended finite element method (XFEM)     computational accuracy    

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Ion beam figuring of continuous phase plates based on the frequency filtering process

Mingjin XU,Yifan DAI,Xuhui XIE,Lin ZHOU,Shengyi LI,Wenqiang PENG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 110-115 doi: 10.1007/s11465-017-0430-5

Abstract: approach with different beam diameters based on the frequency filtering method to improve the machining accuracyConsequently, the fast convergence of the machining accuracy and efficiency can be achieved.

Keywords： ion beam figuring (IBF)     continuous phase plates (CPPs)     machining accuracy     machining efficiency     frequency    

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Accuracy Eludes Competitors in Facebook Deepfake Detection Challenge

Ramin Skibba

Engineering 2020, Volume 6, Issue 12,   Pages 1339-1340 doi: 10.1016/j.eng.2020.10.008

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Multiscale RBF-based central high resolution schemes for simulation of generalized thermoelasticity problems

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 429-455 doi: 10.1007/s11709-018-0483-5

Abstract: In this study, average-interpolating radial basis functions (RBFs) are successfully integrated with central high-resolution schemes to achieve a higher-order central method. This proposed method is used for simulation of generalized coupled thermoelasticity problems including shock (singular) waves in their solutions. The thermoelasticity problems include the LS (systems with one relaxation parameter) and GN (systems without energy dissipation) theories with constant and variable coefficients. In the central high resolution formulation, RBFs lead to a reconstruction with the optimum recovery with minimized roughness on each cell: this is essential for oscillation-free reconstructions. To guarantee monotonic reconstructions at cell-edges, the nonlinear scaling limiters are used. Such reconstructions, finally, lead to the total variation bounded (TVB) feature. As RBFs work satisfactory on non-uniform cells/grids, the proposed central scheme can handle adapted cells/grids. To have cost effective and accurate simulations, the multiresolution–based grid adaptation approach is then integrated with the RBF-based central scheme. Effects of condition numbers of RBFs, computational complexity and cost of the proposed scheme are studied. Finally, different 1-D coupled thermoelasticity benchmarks are presented. There, performance of the adaptive RBF-based formulation is compared with that of the adaptive Kurganov-Tadmor (KT) second-order central high-resolution scheme with the total variation diminishing (TVD) property.

Keywords： central high resolution schemes     RBFs     higher order accuracy     generalized thermoelasticity     multiresolution-based    

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Coupling evaluation for material removal and thermal control on precision milling machine tools

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 12-12 doi: 10.1007/s11465-021-0668-9

Abstract: useful energy consumed by thermal control (TC) for maintaining internal thermal stability and machining accuracyFurthermore, the heat characteristics are analyzed, which can be adopted to represent machining accuracyRegression analysis shows that heat dissipation positively contributes 54.1% to machining accuracy, whereasThis paper reveals the coupling effect of MR and TC on energy efficiency and machining accuracy.

Keywords： machine tools     cutting energy efficiency     thermal stability     machining accuracy     coupling evaluation    

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Linear quadratic optimal controller for cable-driven parallel robots

Saeed ABDOLSHAH,Erfan SHOJAEI BARJUEI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 344-351 doi: 10.1007/s11465-015-0364-8

Abstract: However, the use of cables lowers the stiffness of these robots, which in turn may decrease motion accuracy

Keywords： accuracy     cable-driven parallel robot     linear quadratic optimal control    

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Title Author Date Type Operation

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

TUO Yaofei, CHEN Jianjun, ZHANG Chijiang, CHEN Yongqin

Journal Article

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

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

Impact of crude distillation unit model accuracy on refinery production planning

Gang FU, Pedro A. Castillo CASTILLO, Vladimir MAHALEC

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

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

XB High Accuracy Rocket Sled Test Track

Yang Xingbang

Journal Article

A feasibility study of the measuring accuracy and capability of wireless sensor networks in tunnel monitoring

Xiaojun LI, Zhong JI, Hehua ZHU, Chen GU

Journal Article

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

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Journal Article

XFEM schemes for level set based structural optimization

Li LI, Michael Yu WANG, Peng WEI

Journal Article

Ion beam figuring of continuous phase plates based on the frequency filtering process

Mingjin XU,Yifan DAI,Xuhui XIE,Lin ZHOU,Shengyi LI,Wenqiang PENG

Journal Article

Accuracy Eludes Competitors in Facebook Deepfake Detection Challenge

Ramin Skibba

Journal Article

Multiscale RBF-based central high resolution schemes for simulation of generalized thermoelasticity problems

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI

Journal Article

Coupling evaluation for material removal and thermal control on precision milling machine tools

Journal Article

Linear quadratic optimal controller for cable-driven parallel robots

Saeed ABDOLSHAH,Erfan SHOJAEI BARJUEI

Journal Article