检索结果-内蒙古大学图书馆

作者： Yi Zhang Xue-Wei Jiang Lu Zheng Run-Yu Tian Wuhan Textile and Apparel Digital Engineering Technology Research Centre School of FashionWuhan Textile University

To give a reasonable legging designing scheme,the comfort of leggings was studied based on the restraint index in this *** evaluation of comfort adopts a method of combination between the objective and perceptual *** objective was described by a pressure parameter named restraint index,the objective evaluation was acquired from the three-dimension body scanning technology and physical *** perceptual evaluation was characterized by the sensation of constriction and *** evaluation system was designed based on the Five-level interval *** results suggest that the pressure of legging affects the comfort of wearing and that the sensation of restraint is greater than *** further analysis,it is found that the larger the constraint the stronger the *** provides theoretical guidance for the design of leggings.

关键词： Pressure of Leggings Constriction and Tickling Feeling Restraint Index Objective Evaluation Perceptual Evaluation

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Study on the Breast Shape of Young Women based on 3-D Body Scanning

Study on the Breast Shape of Young Women based on 3-D Body S...

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作者： Run-Yu Tian Xue-Wei Jiang Wuhan Textile and Apparel Digital Engineering Technology Research Centre School of FashionWuhan Textile University

Through three-dimensional scanning of 39 women aged between 18 to25,9 measurement items and 5 derived items related to breast shape were *** basic breast shape of the sample women was divided according to the degree of breast sagging,breast fullness and breast *** results showed that the ideal breast-tobody ratio of young women is about 0.713,and the ideal breast point spacing to breast diameter width ratio is about *** choosing bras,the ordinary type is most common,followed by the breast-lifting *** people need to wear bras with side-tightening *** results can provide reference for underwear enterprises to make bra production plans,as well as help women choose their bra sizes.

关键词： Breast Shape 3-D Body Scanning Bra Size Classification of Breast Shape

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Reusing the Evaluations of Basis Functions in the Integration for Isogeometric Analysis

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Computer Modeling in engineering & Sciences 2020年第2期122卷 459-485页

作者： Zijun Wu Shuting Wang Wenjun Shao Lianqing Yu Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile UniversityWuhan430200China. National CAD Support Software Engineering Research Center Huazhong University of Science and TechnologyWuhan430074China. School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan430074China.

We propose a new approach to reuse the basis function evaluations in the numerical integration of isogeometric *** concept of reusability of the basis functions is introduced according to their symmetrical,translational and proportional features on both the coarse and refined *** on these features and the parametric domain regularity of each basis,we classify the bases on the original level and then reuse them on the refined level,which can reduce the time for basis calculations at integration *** using the sum factorization method and the mean value theorem for the integrals,a new integration method with high integral efficiency is *** validate the proposed method by some structural analysis problems in domains with different *** the numerical result accuracy and the time cost of the proposed integration method with the full Gauss integration quadrature,it turns out to be very promising.

关键词： Isogeometric analysis NURBS reusability integration.

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A Swing-Up and Stable Control Strategy for Pendubot Based on Nonlinear Model Predictive Method

A Swing-Up and Stable Control Strategy for Pendubot Based on...

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Chinese Automation Congress (CAC)

作者： Lejun Wang Yiqin Liu Ruihuan Zhang Zixin Huang Zhen Cai School of Automation/School of Industrial Internet Chongqing University of Posts and Telecommunications Chongqing China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Wuhan China School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan China School of Information Engineering Wuhan City Polytechnic Wuhan China

The control objective of Pendubot is to stabilise the system in a vertically upward position by swinging up from a vertically downward position. Facing various physical constraints in practical applications, this paper proposes a swing-up stabil-isation control strategy based on a nonlinear model prediction method to accomplish the above control objective. On the basis of the system dynamics model, the forward Euler method is used to construct a nonlinear prediction model of the system. According to the control objectives and physical constraints of the system, the performance index function is designed, and then the control inputs of each sampling cycle are obtained through rolling optimisation and feedback correction, so that the system state gradually converges to the target trajectory, thus achieving the motion control objective. Based on the simulation results, it can be seen that the strategy proposed in this paper is efficient and robust under external disturbances.

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Oscillation Trajectory Optimization and Control Method for Two-Link Underactuated Manipulators

Oscillation Trajectory Optimization and Control Method for T...

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Chinese Control Conference (CCC)

作者： Lejun Wang Huiming Wang Xianlun Tang Zixin Huang Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications Chongqing China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Wuhan China School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan China

This paper provides an oscillation trajectory optimization and control method for two-link underactuated manipulators (UMs) in a vertical plane. The proposed method solves the problem that the UMs cannot always enter the balance region in the partitioning method. First, we establish the system dynamic model, and analyze the system couple characteristics. Then, we program an oscillation trajectory for the active link, and use the intelligent method to obtain the trajectory parameters, so ensuring the system can reach the area adjacent to the target position through tracking control. Next, we design the controller to realize the stable control at the target position. Finally, the simulation results show the effectiveness and generality of the control strategy.

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Oscillation Trajectory Optimization and Control Method for Two-link Underactuated Manipulators

Oscillation Trajectory Optimization and Control Method for T...

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第42届中国控制会议

作者： Lejun Wang Huiming Wang Xianlun Tang Zixin Huang Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University School of Electrical and Information Engineering Wuhan Institute of Technology

This paper provides an oscillation trajectory optimization and control method for two-link underactuated manipulators(UMs) in a vertical *** proposed method solves the problem that the UMs cannot always enter the balance region in the partitioning ***,we establish the system dynamic model,and analyze the system couple ***,we program an oscillation trajectory for the active link,and use the intelligent method to obtain the trajectory parameters,so ensuring the system can reach the area adjacent to the target position through tracking ***,we design the controller to realize the stable control at the target ***,the simulation results show the effectiveness and generality of the control strategy.

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Review on the 3-D simulation for weft knitted fabric

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Journal of Engineered Fibers and Fabrics 2021年第16期16卷

作者： Sha, Sha Geng, Anqi Gao, Yuqin Li, Bin Jiang, Xuewei Tao, Hui Luo, Lei Yuan, Xiaohong Ke, Huizhen Hu, Xinrong Deng, Zhongmin Chen, Zhi State Key Laboratory of New Textile Materials and Advanced Processing Technologies Key Laboratory of Textile Fiber Product Ministry of Education Wuhan Textile University WuhanHubei China Wuhan Textile and Apparel Digital Engineering Technology Research Center School of Fashion Wuhan Textile University WuhanHubei China Engineering Research Center of Hubei Province for Clothing Information Wuhan Textile University WuhanHubei China Fujian Key Laboratory of Novel Functional Textile Fibers and Materials Engineering Research Center of Textile and Clothing Fujian Province University Minjiang University Fuzhou China

There are different kinds of geometrical models and physical models used to simulate weft knitted fabrics nowadays, such as loop models based on Pierce, piecewise function, spline curve, mass-spring model, and finite element analyses (FEA). Weft knitting simulation technology, including modeling and yarn reality, has been widely adopted in fabric structure designing for the manufacturer. The technology has great potentials in both industries and dynamic virtual display. The present article is aimed to review the current development of 3-D simulation technique for weft knitted fabrics. © The Author(s) 2021.

关键词： Knit fabrics

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Hydrogen bond network study of cellulose ⅱ based on molecular dynamics simulation 12

Hydrogen bond network study of cellulose ⅱ based on molecul...

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12th textile Bioengineering and Informatics Symposium, TBIS 2019

作者： Chen, Yu Jiang, Xue-Wei Wuhan Textile and Apparel Digital Engineering Technology Research Center School of Fashion Wuhan Textile University No.1 Fangzhi Road Wuhan Hubei430073 China

Hydrogen bonds play an important role in the structure and properties of cellulose Ⅱ. In this paper, the initial atom coordinates and molecular model were obtained from experimental data. The molecular structural and hydrogen bonds of cellulose Ⅱ were analysed, based on the molecular dynamics simulation at 300 K. The discussions were divided into center and origin chains. The properties of the cellulose structure indicate that the initial model and force field are suitable. The results show that bond lengths and angles of cellulose Ⅱ do not change, except for the hydroxyl groups. The dihedral angles affect the hydrogen bonds formation. These angles in the center chain are 32.963%, 14.890% and 26.052%, respectively, which are larger than those in the origin chain. The gt conformation participating in O6-H…O6' hydrogen bonds in the origin chain is 16.558% larger than in the center chain. However, the gg conformational structure is mainly involved in the O3-H…O5 hydrogen bond in the origin chain. Importantly, the formed O3-H…O5 hydrogen bond fluctuates greatly in the origin chain, but hardly exists in the center chain. Interestingly, O2-H…O6' has the shortest bond length and the largest proportion. These results can help us to comprehensive understand the stability and structure of cellulose Ⅱ properties more accurately. © (2019) textile Bioengineering and Informatics Symposium Proceedings 2019 - 12th textile Bioengineering and Informatics Symposium, TBIS 2019. All rights reserved.

关键词： Molecular dynamics

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An Universal Control Strategy for Planar 2-DoF Underactuated Manipulator with One Passive Joint

An Universal Control Strategy for Planar 2-DoF Underactuated...

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第40届中国控制会议

作者： Zixin Huang Yaosheng Zhou Zhen Chen Wei Wang Lejun Wang School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education School of Innovation and Entrepreneurship Wuhan Institute of Technology School of Information and Safety Engineering Zhongnan University of Economics and Law

This paper presents an unified control strategy based on the trajectory planning and tracking control for the planar 2-Do F underactuated manipulator. The trajectory of the active link is composed of two parts. The first part trajectories are designed according to the initial and target angles of the active link. The second part trajectories are designed based on the constraints between the underactuated link and the active link. Meanwhile, the parameters of the trajectories are optimized by the differential evolution algorithm(DEA) to ensure all links eventually reach to their target values by tracking the designed trajectories. Then,the sliding mode variable structure controller are designed to make the active link track their trajectories. The effectiveness of such strategy is demonstrated through simulation results.

关键词： Planar 2-DoF underactuated manipulator Trajectory planning Tracking control Differential evolution algorithm

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Hydrogen Bond Network Study of Cellulose Ⅱ Based on Molecular Dynamics Simulation

Hydrogen Bond Network Study of Cellulose Ⅱ Based on Molecul...

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作者： Yu Chen Xue-Wei Jiang Wuhan Textile and Apparel Digital Engineering Technology Research Center School of FashionWuhan Textile University

Hydrogen bonds play an important role in the structure and properties of cellulose Ⅱ.In this paper,the initial atom coordinates and molecular model were obtained from experimental *** molecular structural and hydrogen bonds of cellulose Ⅱ were analysed,based on the molecular dynamics simulation at 300 *** discussions were divided into center and origin *** properties of the cellulose structure indicate that the initial model and force field are *** results show that bond lengths and angles of cellulose Ⅱ do not change,except for the hydroxyl *** dihedral angles affect the hydrogen bonds *** angles in the center chain are 32.963%,14.890% and 26.052%,respectively,which are larger than those in the origin *** gt conformation participating in O6-H…O6' hydrogen bonds in the origin chain is 16.558% larger than in the center ***,the gg conformational structure is mainly involved in the O3-H…O5 hydrogen bond in the origin ***,the formed O3-H…O5 hydrogen bond fluctuates greatly in the origin chain,but hardly exists in the center ***,O2-H…O6' has the shortest bond length and the largest *** results can help us to comprehensive understand the stability and structure of cellulose Ⅱ properties more accurately.

关键词： Hydrogen Bond Cellulose Ⅱ Molecular Dynamics Simulation Conformation

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