检索结果-内蒙古大学图书馆

23rd IFToMM China International Conference on Mechanism and Machine Science and Engineering, IFToMM CCMMS 2022

作者： Jin, Xichen Tong, Zhizhong Gao, Haibo State Key Laboratory of Robotics and System Harbin Institute of Technology Heilongjiang Harbin150000 China

ISBN: (纸本)9789811993978

This paper presents a general method for dynamic modeling of three-dimensional flexible manipulator with multiple degrees of freedom based on Lagrange’s second kind of dynamic equation. Firstly, the dynamic model of flexible joint considering joint stiffness, joint damping, joint friction and joint clearance is deduced, and the dynamic model of flexible rod considering internal structural damping of flexible rod is deduced by using hypothetical modal method. Secondly, the overall dynamic model of flexible manipulator is obtained by comprehensively considering the flexibility of joint and rod. The joint pair has two settings: rotating pair and moving pair. Finally, the simulation experiment of five degree of freedom series flexible manipulator is carried out to verify the correctness of the dynamic modeling method of multi degree of freedom flexible manipulator. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Flexible manipulators

来源：评论

学校读者我要写书评

暂无评论

The TAO of Blockchain Intelligence for Intelligent Web 3.0

引用

IEEE/CAA Journal of Automatica Sinica 2023年第12期10卷 2183-2186页

作者： Juanjuan Li Fei-Yue Wang IEEE the State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China the State Key Laboratory for Management and Control of Complex Systems Chinese Academy of SciencesBeijing 100190China Faculty of Innovation Engineering Macao University of Science and TechnologyMacao 999078China

WE are in an exciting new intelligent era where various Web 3.0 systems emerge and flourish.[1]–[3].In this new epoch,the collaboration of data and knowledge,humans and machines,actual and virtual worlds is undergoing an unprecedented diversification and community-driven transformation,unveiling an open future full of boundless ***,the value of dispersed data extends far beyond passive storage and application.

关键词： Web TAO knowledge

来源：评论

学校读者我要写书评

暂无评论

3D Roughness Prediction Modeling and Evaluation of Textured Liner of Piston Component-Cylinder System

引用

Chinese Journal of Mechanical Engineering 2024年第5期37卷 203-215页

作者： Yanjun Lü Cheng Liu Yongfang Zhang Cheng Jiang Xudong Bai Zhiguo Xing School of Mechanical and Precision Instrument Engineering Xi’an University of TechnologyXi’an 710048China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Printing Packaging Engineering and Digital Media TechnologyXi’an University of TechnologyXi’an 710054China National Key Laboratory for Remanufacturing Army Academy of Armored ForcesBeijing 100072China

In this study,a machine vision method is proposed to characterize 3D roughness of the textured surface on cylinder liner processed by plateau *** least absolute value(L∞)regression robust algorithm and Levenberg-Marquardt(LM)algorithm are employed to reconstruct image reference *** this basis,a single-hidden layer feedforward neural network(SLFNN)based on the extreme learning machine(ELM)is employed to model the relationship between high frequency information and 3D *** characteristic parameters of Abbott-Firestone curve and 3D roughness measured by a confocal microscope are used to construct ELM-SLFNN prediction model for 3D *** results indicate that the proposed method can effectively characterize 3D roughness of the textured surface of cylinder liner.

关键词： Surface texture Cylinder liner 3D roughness Neural network

来源：评论

学校读者我要写书评

暂无评论

Lightweight broadband microwave absorbing metamaterial with CB-ABS composites fabricated by 3D printing

引用

Chinese Physics B 2023年第4期32卷 691-695页

作者：陈孟州汪刘应刘顾葛超群李涤尘梁庆宣 Xi’an Research Institute of High Technology Xi’an 710025China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China

The self-similarity,high geometric symmetry and spatial utilization properties of fractal structures provide new methods for the development of absorbing *** this paper,the microwave absorption properties of the gradient dendritic fractal metamaterial structure(GDFMs)based on carbon black and acrylonitrile-butadiene-styrene composites were *** optimal metamaterial structure has an effective absorption in the frequency range of 4.5-40 *** rotational-symmetry GDFMs leads to the polarization independence,and the GDFMs exhibits a wide-angle absorption performance for both TE and TM *** is expected that the proposed GDFMs has good application prospects in electromagnetic wave absorption.

关键词： additive manufacturing broadband absorbing polarization and angle independence gradient dendritic fractal structure

来源：评论

学校读者我要写书评

暂无评论

Multi-objective optimization for 10-kW rated power dynamic wireless charging systems of electric vehicles

引用

Science China(Information Sciences) 2022年第10期65卷 178-195页

作者： Ze ZHOU Zhitao LIU Hongye SU Liyan ZHANG State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University School of Automation Wuhan University of Technology

In this paper, we propose a method to optimize the output power, efficiency, and cost of the dynamic wireless charging(DWC) system of electric vehicles by using the transmitting coil spacing as the decision variable. In a set of transmitting equipment, we adopt a structure with two transmitting networks in parallel and derive loss models. The expressions of the output power and efficiency of the DWC system are obtained by data fitting. In addition, combined with the proposed cost function, we construct a multiobjective optimization problem on output power, efficiency, and cost. Due to the complexity of the objective function, it is difficult to solve the problem by the analytic method, and thus we propose a constrained adaptive particle swarm optimization(CAPSO) algorithm with high accuracy to solve the problem. Finally,the simulation results verify the feasibility of the proposed model. The advantages of the proposed CAPSO algorithm and the optimization results under different weight combinations are presented.

关键词： dynamic wireless charging electric vehicles multi-objective optimization constrained adaptive particle swarm optimization

来源：评论

学校读者我要写书评

暂无评论

Design of umbrella-like mechanically deployable aerodynamic decelerators on the basis of plane-symmetric 7R linkages

引用

Frontiers of Mechanical Engineering 2025年第3期20卷 1-26页

作者： Chen, Zijie Guo, Hongwei Shi, Chuang Liu, Rongqiang Deng, Zongquan State Key Laboratory of Robotics Harbin Institute of Technology Harbin China

The surging interest in planetary exploration underscores the need for deployable aerodynamic decelerators with a low ballistic coefficient. This study introduces a novel approach to designing and constructing mechanically deployable aerodynamic decelerators (MDADs) that utilize an umbrella-like mechanism and proposes a new mechanism of MDADs through this method. The proposed method utilizes plane-symmetric 7R (R: revolute joint) linkages, and the kinematics of these linkages are systematically analyzed using the product of exponentials method. The 7R linkage kinematics are equated to an equivalent joint, the foundation for constructing umbrella-like deployable mechanisms. Three distinct types of mechanisms are synthesized using this methodology. Subsequently, their kinematics are analyzed based on the equivalent joint, and the configurations are experimentally validated through 3D-printed models and kinematic simulations. Trajectory simulations and structural analyses are conducted to assess the performance of the deployable mechanisms and provide valuable insights into their capabilities. This research contributes to advancing deployable aerodynamic decelerator technology and offers a promising avenue for future planetary entry, descent, and landing applications.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Self-Preloading Flexible Attachment Actuator with Multi-Mechanism Hierarchical Structure

引用

Journal of Bionic Engineering 2024年第4期21卷 1830-1846页

作者： Zhouyi Wang Qingsong Yuan Zhiyuan Weng Junsheng Yao Xuan Wu Lei Li Weipeng Li Yiping Feng Zhendong Dai College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics210016NanjingChina State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and Astronautics210016NanjingChina Robotics Laboratory China Nanhu Academy of Electronics and Information Technology314000JiaxingZhejiangChina

Flexible attachment actuators are popular in a wide range of applications,owing to their flexibility and highly reliable ***,their reversible adhesion performance depends on the actual effective contact area and peel angle during ***,a good actuator must ensure a uniform and reliable pre-pressure load on an adhesive surface,to increase the effective contact area of the attached surface,thereby maximizing *** study was inspired by fusion bionics for designing a hierarchical attachment structure with vacuum-adsorption and dry-adhesion *** designed structure used the normal force under the negative pressure of a suction cup as a stable source of a pre-pressure *** optimizing the rigid and flexible structural layers of the attachment structure,a load was applied uniformly to the adhesion area;thus,reliable attachment was achieved by *** structure achieved detachment by exploiting the large deformation of a pneumatic structure under a positive *** hierarchical attachment structure achieved up to 85%of the optimal performance of the adhesive *** to its self-preloading and reliable attachment characteristics,the designed structure can be used as an attachment unit in various complex scenarios,such as small,lightweight climbing platforms and the transport of objects in long,narrow pipelines.

关键词： Multi-mechanism attachment Self-preloading Hierarchical structure Adhesion Vacuum adsorption

来源：评论

学校读者我要写书评

暂无评论

Expansion of Self-assembled Structures of Heteroarray NdFeB Semicircular Arc Magnetic Minirobots

引用

Journal of Bionic Engineering 2024年第5期21卷 2258-2270页

作者： Wenguang Yang Huibin Liu Qinghao Guo Wenhao Wang Haibo Yu Anqin Liu School of Electromechanical and Automotive Engineering Yantai UniversityYantai264005China State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang110016China School of Mechanical and Electrical Engineering Yantai Institute of TechnologyYantai264005China

Researching the cooperative operation and functional expansion of multiple minirobot assemblies has the potential to bring about significant advancements in the practical applications of *** this study,we present a novel assembly sys-tem comprised of arc-shaped NdFeB magnetic *** minirobots can be individually utilized as assembly units,allowing for function expansion and comprehensive capability *** fabricate four Semicircular Arc Magnetic Minirobots(SAMM)arranged in different configurations and analyze their force and motion ***,by using this unit as a base,various expansion structures such as latches,petals,and rings can be assembled through reason-able *** define the comprehensive reinforcement interval by comparatively analyzing changes in the unit's motion characteristics and operational *** motion manipulation is employed to verify the rationality of the basic unit structure and the feasibility of the assembly *** proposed self-assembly scheme for magnetic minirobots exhibits great potential and may be used as a paradigm for future research on expanding the functionality of minirobots.

关键词： NdFeB Semicircular arc Cutoff frequency Assembly Cooperative work Magnetic minirobots

来源：评论

学校读者我要写书评

暂无评论

Flexible pressure sensors with ultrahigh stress tolerance enabled by periodic microslits

引用

Microsystems & Nanoengineering 2024年第1期10卷 301-311页

作者： Song Wang Chenying Wang Yifan Zhao Yujing Zhang Yaxin Zhang Xiangyue Xu Qijing Lin Kai Yao Yuheng Wang Feng Han Yu Sun Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’anChina State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesSchool of Instrument Science and TechnologyXi’an Jiaotong UniversityXi’anChina The Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingboChina Department of Mechanical and Industrial Engineering University of TorontoTorontoCanada

Stress tolerance plays a vital role in ensuring the effectiveness of piezoresistive sensing films used in flexible pressure ***,existing methods for enhancing stress tolerance employ dome-shaped,wrinkle-shaped,and pyramidal-shaped microstructures in intricate molding and demolding processes,which introduce significant fabrication challenges and limit the sensing *** address these shortcomings,this paper presents periodic microslits in a sensing film made of multiwalled carbon nanotubes and polydimethylsiloxane to realize ultrahigh stress tolerance with a theoretical maximum of 2.477 MPa and a sensitivity of 18.092 kPa−*** periodic microslits permit extensive deformation under high pressure(e.g.,400 kPa)to widen the detection ***,the periodic microslits also enhance the sensitivity based on simultaneously exhibiting multiple synapses within the sensing interface and between the periodic sensing *** proposed solution is verified by experiments using sensors based on the microslit strategy for wind direction detection,robot movement sensing,and human health *** these experiments,vehicle load detection is achieved for ultrahigh pressure sensing under an ultrahigh pressure of over 400 kPa and a ratio of the contact area to the total area of 32.74%.The results indicate that the proposed microslit strategy can achieve ultrahigh stress tolerance while simplifying the fabrication complexity of preparing microstructure sensing films.

关键词： robot shaped stress

来源：评论

学校读者我要写书评

暂无评论

Discriminative feature encoding for intrinsic image decomposition

引用

Computational Visual Media 2023年第3期9卷 597-618页

作者： Zongji Wang Yunfei Liu Feng Lu Key Laboratory of Network Information System Technology(NIST) Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBeihang UniversityBeijing 100191China Peng Cheng Laboratory Shenzhen 518000China

Intrinsic image decomposition is an important and long-standing computer vision *** an input image,recovering the physical scene properties is *** physically motivated priors have been used to restrict the solution space of the optimization problem for intrinsic image *** work takes advantage of deep learning,and shows that it can solve this challenging computer vision problem with high *** focus lies in the feature encoding phase to extract discriminative features for different intrinsic layers from an input *** achieve this goal,we explore the distinctive characteristics of different intrinsic components in the high-dimensional feature embedding *** define feature distribution divergence to efficiently separate the feature vectors of different intrinsic *** feature distributions are also constrained to fit the real ones through a feature distribution *** addition,a data refinement approach is provided to remove data inconsistency from the Sintel dataset,making it more suitable for intrinsic image *** method is also extended to intrinsic video decomposition based on pixel-wise correspondences between adjacent *** results indicate that our proposed network structure can outperform the existing state-of-the-art.

关键词： intrinsic image decomposition deep learning feature distribution data refinement

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：