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CNC programming system for complex components based on KBE within integrated environment of CAD/CAPP/

Shengwen ZHANG, Guicheng WANG, Liang ZHANG, Xifeng FANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 97-102 doi: 10.1007/s11465-009-0007-z

Abstract: intelligent manufacturing technology and overcome shortcomings of computerized numerical control(CNC) programmingThis paper constructs the architecture of CNC programming based on KBE within CAD/CAPP/CAM and exploresthe key technology of applying KBE to CNC programming — knowledge representation, knowledge acquisition, knowledge reasoning, and generalized knowledge base system of CNC programming.The prototype system of CNC programming for complex components based on KBE within CAD/CAPP/CAM has been

Keywords： NC programming     CAD/CAPP/CAM     KBE    

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Dynamic characteristics of an NC table with phase space reconstruction

Linhong WANG, Bo WU, Runsheng DU, Shuzi YANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 179-183 doi: 10.1007/s11465-009-0018-9

Abstract: The dynamic properties of a numerical control (NC) table directly interfere with the accuracy and surfacereconstruction, the correlation dimension, maximum Lyapunov exponent, and dynamic time series measured from the NCThe chaotic characteristic of the dynamic properties of the NC table is revealed via various approachesTherefore, an NC table is a nonlinear dynamic system.

Keywords： NC table     chaotic characteristic     phase-space reconstruction     correlation dimension     maximum Lyapunov exponent    

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Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 431-437 doi: 10.1007/s11465-010-0110-1

Abstract: Based on this model, a new method for the kinematic error separation in five-axis numerical control (NCbar is used to measure the relative distance between the spindle and the worktable in the motion of NCmeasured by telescoping double ball bar is substituted into the model to obtain kinematic error of NC

Keywords： error modeling     error separation     telescoping double ball bar     five-axis numerical control (NC) machining    

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Dynamic characteristics of NC table with SVD

WANG Linhong, WU Bo, DU Runsheng, YANG Shuzi

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 385-391 doi: 10.1007/s11465-008-0052-z

Abstract: SVD (singular value decomposition) method to study dynamic characteristics of a numerical control (NCAcceleration signals of the NC table at three directions are tested; the singular spectrum of the signals

Keywords： Acceleration     vibration source     chaotic     energy     dynamic    

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Kinematic simulation of a parallel NC machine tool in the manufacturing process

ZHANG Jian-min, FAN Yu, JIA Dong-yun, ZOU Qiu-ling, WU Ying

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2,   Pages 173-176 doi: 10.1007/s11465-006-0020-4

Abstract: Aimed at enhancing the research status of parallel machine tools, this paper introduces the structure of a 6-SPS parallel machine tool and explains the application significance of the kinematic simulation of the manufacturing pro

Keywords： 6-SPS     kinematic simulation     manufacturing     application significance    

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Influence of Rigidity of Feed System With Ball Screw in NC Lathe on Positioning Precision

Wu Nanxing,Hu Rufu,Sun Qinghong

Strategic Study of CAE 2004, Volume 6, Issue 9,   Pages 46-49

Abstract:

Rigidity of feed system with ball screw in NC lathe has a major influence on loss of momentum and

Keywords： NC lathe     rigidity     loss of momentum     positioning precision    

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Detecting interaction/complexitywithin crowd movements using braid entropy Research Papers

Murat AKPULAT, Murat EKİNCİ

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 6,   Pages 849-861 doi: 10.1631/FITEE.1800313

Abstract:

The segmentation of moving and non-moving regions in an image within the field of crowd analysis is a crucial process in terms of understanding crowd behavior. In many studies, similar movements were segmented according to the location, adjacency to each other, direction, and average speed. However, these segments may not in turn indicate the same types of behavior in each region. The purpose of this study is to better understand crowd behavior by locally measuring the degree of interaction/complexity within the segment. For this purpose, the flow of motion in the image is primarily represented as a series of trajectories. The image is divided into hexagonal cells and the finite time braid entropy (FTBE) values are calculated according to the different projection angles of each cell. These values depend on the complexity of the spiral structure that the trajectories generated throughout the movement and show the degree of interaction among pedestrians. In this study, behaviors of different complexities determined in segments are pictured as similar movements on the whole. This study has been tested on 49 different video sequences from the UCF and CUHK databases.

Keywords： Crowd behavior     Motion segmentation     Motion entropy     Crowd scene analysis     Complexity detection     Braid entropy    

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New evaluation method on the precision of NC machine tools

Zhao Wanhua,Zhang Jun,Liu Hui,Yang Xiaojun

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 93-98

Abstract:

The performance of computerized numerical control (CNC) machine tool is evaluated by the traditional positioning error and the positioning repeatability, which is in quasi static and cannot reflect the precision of machine tool in the process of movement and machining. In this paper, a novel precision evaluation method which takes the dynamic precision as index is proposed for high-speed machine tool. The precision of machine tool is described through the consistence of the actual trajectory and the ideal command. The specific evaluation index of dynamic precision is provided. Meanwhile, the measure method of evaluation index is put forward. It can be obtained that this new evaluation method of machine tool precision can evaluate the quality of key performance in CNC machine tool systematically and roundly.

Keywords： NC machine tools     dynamic precision     evaluation index     impact factors    

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Smoothing ramp events in wind farm based on dynamic programming in energy internet

Jiang LI, Guodong LIU, Shuo ZHANG

Frontiers in Energy 2018, Volume 12, Issue 4,   Pages 550-559 doi: 10.1007/s11708-018-0593-8

Abstract: This paper proposes a dynamic programming method in smoothing ramp events.Then, the optimization problem in the energy internet is transformed into a multi-stage dynamic programmingproblem, and the dynamic programming method proposed is applied to solve the optimization problem.The results show that the dynamic programming method proposed is effective for smoothing wind power and

Keywords： energy internet     wind power     ramp events     dynamic programming    

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Technology and system of constraint programming for industry production scheduling

Yarong CHEN, Zailin GUAN, Yunfang PENG, Xinyu SHAO, Muhammad HASSEB

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 455-464 doi: 10.1007/s11465-010-0106-x

Abstract: The use of techniques and system of constraint programming enables the implementation of precise, flexibletechnology, such as modeling, search, constraint propagation, consistency, and optimization of constraint programming

Keywords： constraint programming     production scheduling     constraint propagation     search     consistency     optimization    

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Two-stage stochastic programming with robust constraints for the logistics network post-disruption response

Frontiers of Engineering Management   Pages 67-81 doi: 10.1007/s42524-022-0240-2

Abstract: post-disruption response strategy optimization problem, this study proposes a novel two-stage stochastic programmingAn equivalent tractable mixed-integer linear programming reformulation is further derived by linearizing

Keywords： logistics network design     post-disruption response strategy     two-stage stochastic programming     conditional    

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Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linear programming

Frontiers of Engineering Management   Pages 452-461 doi: 10.1007/s42524-022-0209-1

Abstract: This study combines multi-regional input–output (MRIO) model with linear programming (LP) model to explore

Keywords： CO2 emissions     demand side regulation     multi-regional input–output model     linear programming    

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Upgrade and Organized Innovation of China’s NC Generation Products: A Case Study in Quanzhou City

Wei Feng,Zhou Yuan and Xue Lan

Strategic Study of CAE 2016, Volume 18, Issue 6,   Pages 110-116 doi: 10.15302/J-SSCAE-2016.06.022

Abstract:

The "Numerical Control (NC) Generation Innovation Project" aims to apply NC technologyThis paper takes the update and upgrade of NC equipment in Quanzhou city as a case study.Focusing on practical experience with the NC Generation Innovation Project within the framework of innovationof strong demand pull from the user market and effective technology push from R&D agencies, the NC

Keywords： NC generation     generic technology     technology diffusion     innovation governance     organized innovation    

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The Forward Recurrent Method for Dynamic Programming

Zhang Zhao,Pei Yanling,Zhang Renbao

Strategic Study of CAE 2005, Volume 7, Issue 2,   Pages 62-65

Abstract:

Backward recurrent method is usually adopted in seeking optimal solution by dynamic programming.A forward recurrent method to find optimal solution by dynamic programming is presented on the basisThe fundamental equation of dynamic programming and Millton-Jacobi's equation are also derived.It's an exploratory study on optimal solution of dynamic programming.

Keywords： dynamic programming     multi-level decision     functional equation     optimal solution    

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Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

Balasubramaniyan SARAVANAN, Surbhi SIKRI, K. S. SWARUP, D. P. KOTHARI

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 333-341 doi: 10.1007/s11708-013-0259-5

Abstract: There are many conventional and evolutionary programming techniques used for solving the unit commitmentDynamic programming (DP) is a conventional algorithm used to solve the deterministic problem.

Keywords： unit commitment (UC)     deterministic     stochastic     dynamic programming (DP)     optimization     state diagram    

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Title Author Date Type Operation

CNC programming system for complex components based on KBE within integrated environment of CAD/CAPP/

Shengwen ZHANG, Guicheng WANG, Liang ZHANG, Xifeng FANG

Journal Article

Dynamic characteristics of an NC table with phase space reconstruction

Linhong WANG, Bo WU, Runsheng DU, Shuzi YANG

Journal Article

Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Journal Article

Dynamic characteristics of NC table with SVD

WANG Linhong, WU Bo, DU Runsheng, YANG Shuzi

Journal Article

Kinematic simulation of a parallel NC machine tool in the manufacturing process

ZHANG Jian-min, FAN Yu, JIA Dong-yun, ZOU Qiu-ling, WU Ying

Journal Article

Influence of Rigidity of Feed System With Ball Screw in NC Lathe on Positioning Precision

Wu Nanxing,Hu Rufu,Sun Qinghong

Journal Article

Detecting interaction/complexitywithin crowd movements using braid entropy

Murat AKPULAT, Murat EKİNCİ

Journal Article

New evaluation method on the precision of NC machine tools

Zhao Wanhua,Zhang Jun,Liu Hui,Yang Xiaojun

Journal Article

Smoothing ramp events in wind farm based on dynamic programming in energy internet

Jiang LI, Guodong LIU, Shuo ZHANG

Journal Article

Technology and system of constraint programming for industry production scheduling

Yarong CHEN, Zailin GUAN, Yunfang PENG, Xinyu SHAO, Muhammad HASSEB

Journal Article

Two-stage stochastic programming with robust constraints for the logistics network post-disruption response

Journal Article

Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linear programming

Journal Article

Upgrade and Organized Innovation of China’s NC Generation Products: A Case Study in Quanzhou City

Wei Feng,Zhou Yuan and Xue Lan

Journal Article

The Forward Recurrent Method for Dynamic Programming

Zhang Zhao,Pei Yanling,Zhang Renbao

Journal Article

Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

Balasubramaniyan SARAVANAN, Surbhi SIKRI, K. S. SWARUP, D. P. KOTHARI

Journal Article