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Measurement and analysis of typical motion error traces from a circular test
LI Xiaoli, LIU Huanlao
《机械工程前沿(英文)》 2008年 第3卷 第2期 页码 146-150 doi: 10.1007/s11465-008-0033-2
关键词: machine compensation direction combination desired efficient
Design, analysis, and neural control of a bionic parallel mechanism
《机械工程前沿(英文)》 2021年 第16卷 第3期 页码 468-486 doi: 10.1007/s11465-021-0640-8
Motion capability analysis of a quadruped robot as a parallel manipulator
Jingjun YU,Dengfeng LU,Zhongxiang ZHANG,Xu PEI
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 295-307 doi: 10.1007/s11465-014-0317-7
This paper presents the forward and inverse displacement analysis of a quadruped robot MANA as a parallel manipulator in quadruple stance phase, which is used to obtain the workspace and control the motion of the body. The robot MANA designed on the basis of the structure of quadruped mammal is able to not only walk and turn in the uneven terrain, but also accomplish various manipulating tasks as a parallel manipulator in quadruple stance phase. The latter will be the focus of this paper, however. For this purpose, the leg kinematics is primarily analyzed, which lays the foundation on the gait planning in terms of locomotion and body kinematics analysis as a parallel manipulator. When all four feet of the robot contact on the ground, by assuming there is no slipping at the feet, each contacting point is treated as a passive spherical joint and the kinematic model of parallel manipulator is established. The method for choosing six non-redundant actuated joints for the parallel manipulator from all twelve optional joints is elaborated. The inverse and forward displacement analysis of the parallel manipulator is carried out using the method of coordinate transformation. Finally, based on the inverse and forward kinematic model, two issues on obtaining the reachable workspace of parallel manipulator and planning the motion of the body are implemented and verified by ADAMS simulation.
关键词: quadruped robot actuated joints selection kinematics analysis motion planning parallel manipulator
Motion-based analysis for construction workers using biomechanical methods
Xincong YANG, Yantao YU, Heng LI, Xiaochun LUO, Fenglai WANG
《工程管理前沿(英文)》 2017年 第4卷 第1期 页码 84-91 doi: 10.15302/J-FEM-2017004
关键词: biomechanical method motion-based analysis construction worker muscular torques workload
JIANG Tong, CHEN Laiyun, XING Hailing, L? Xilin
《结构与土木工程前沿(英文)》 2007年 第1卷 第4期 页码 430-435 doi: 10.1007/s11709-007-0058-3
关键词: surface ground horizontal uniform Finally seismic ground correlative seismic
Fugui XIE,Xin-Jun LIU
《机械工程前沿(英文)》 2016年 第11卷 第2期 页码 135-143 doi: 10.1007/s11465-016-0389-7
This study introduces a high-speed parallel robot with Schönflies motion. This robot exhibits a promising prospect in realizing high-speed pick-and-place manipulation for packaging production lines. The robot has four identical limbs and a single platform. Its compact structure and single-platform concept provides this robot with good dynamic response potential. A line graph method based on Grassmann line geometry is used to investigate the mobility characteristics of the proposed robot. A generalized Blanding rule is also introduced into this procedure to realize mutual conversion between the line graphs for motions and constraints. Subsequently, the inverse kinematics is derived, and the singularity issue of the robot is investigated using both qualitative and quantitative approaches. Input and output transmission singularity indices are defined based on the reciprocal product in screw theory and the virtual coefficient by considering motion/force transmission performance. Thereafter, the singular loci of the proposed robot with specific geometric parameters are derived. The mobility analysis, inverse kinematics modeling, and singularity analysis conducted in this study are helpful in developing the robot.
关键词: parallel robot mobility inverse kinematics singularity transmission performance
Offline motion planning and simulation of two-robot welding coordination
Tie ZHANG, Fan OUYANG
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 81-92 doi: 10.1007/s11465-012-0309-4
This paper focuses on the two-robot welding coordination of complex curve seam which means one robot grasp the workpiece, the other hold the torch, the two robots work on the same workpiece simultaneously. This paper builds the dual-robot coordinate system at the beginning, and three point calibration method of two robots’ relative base coordinate system is presented. After that, the non master/slave scheme is chosen for the motion planning, the non master/slave scheme sets the poses versus time function of the point u on the workpiece, and calculates the two robot end effecter trajectories through the constrained relationship matrix automatically. Moreover, downhand welding is employed which can guarantee the torch and the seam keep in good contact condition all the time during the welding. Finally, a Solidworks-SimMechanics simulation platform is established, and a simulation of curved steel pipe welding is conducted. The results of the simulation illustrate the welding process can meet the requirements of downhand welding, the joint displacement curves are smooth and continuous and no joint velocities are out of working scope.
关键词: complex curve seam two robots coordinated welding motion planning
Piezoelectric film-actuated motion platform with high resolution
HUA Shunming, ZHANG Hongzhuang, CHENG Guangming, FAN Zunqiang, LIU Jianfang
《机械工程前沿(英文)》 2008年 第3卷 第3期 页码 265-269 doi: 10.1007/s11465-008-0041-2
关键词: mathematical stick-slip mechanism piezoelectric film-actuated analysis terrific
Po-Chih LEE, Jyh-Jone LEE
《机械工程前沿(英文)》 2012年 第7卷 第2期 页码 163-187 doi: 10.1007/s11465-012-0324-5
This paper presents the analysis of three parallel manipulators with Schoenflies-motion. Each parallel manipulator possesses two limbs in structure and the end-effector has three DOFs (degree of freedom) in the translational motion and one DOF in rotational motion about a given direction axis with respect to the world coordinate system. The three isoconstrained parallel manipulators have the structures denoted as CuuUwHw-//-CvvUwHw, CuRuuUhw-//-CvRvvUhwand CuPuUhw-//- CvPvUhw. The kinematic equations are first introduced for each manipulator. Then, Jacobian matrix, singularity, workspace, and performance index for each mechanism are subsequently derived and analysed for the first time. The results can be helpful for the engineers to evaluate such kind of parallel robots for possible application in industry where pick-and-place motion is required.
关键词: parallel manipulator schoenflies motion kinematics singularity workspace performance index
利用编织熵探测人群运动的相互作用/复杂程度 Research Papers
Murat AKPULAT, Murat EKİNCİ
《信息与电子工程前沿(英文)》 2019年 第20卷 第6期 页码 849-861 doi: 10.1631/FITEE.1800313
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0687-1
关键词: masticatory robot cable-driven linear actuator parallel robot stiffness analysis
Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links
CHEN Xin-bo, YU Zhen
《机械工程前沿(英文)》 2006年 第1卷 第1期 页码 76-79 doi: 10.1007/s11465-005-0007-6
The design of intermittent-motion linkages using traditional methods is usually complicated. In this paper, (1) a new method for realizing intermittent motion, using linkages with a slight difference in length between links, is studied; (2) some new types of intermittent-motion linkages and their software for visual analysis and design are developed; and (3) influences of some design parameters on intermittent-motion characteristics are clarified. Results confirmed that the theory and the software are useful, making the synthesis of intermittent-motion linkages clear and easy.
关键词: synthesis useful intermittent intermittent-motion traditional
任克明,潘悦,王岩
《中国工程科学》 1999年 第1卷 第3期 页码 31-34
文章在新型潜艇全综合、分布式作战系统的体系结构下,以声纳信息作为主要信息源,综述了纯方位TMA、多信息融合TMA、方位-多普勒TMA、噪声能量-方位联合估距、与匹配场声源定位相结合等几种实现TMA的方法,在此基础上对TMA功能提出了新设想,初步提出了一种TMA的功能设计。该功能设计从作战系统的角度出发开发TMA功能,充分利用了多传感器获得的信息,以及人的主观判断,增强了TMA的能力,使它能够更好地为指挥员战术决策服务,为武器的发射控制提供更加精确的目标运动要素解算结果。与通常的TMA设计相比,该项设计能够识别目标机动,增加了人机交互功能,并设计了便于观看TMA结果、监视目标机动和执行交互式跟踪改进的TMA显示画面。
Design and modeling of continuum robot based on virtual-center of motion mechanism
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0739-6
关键词: VCM mechanism continuum robot flexural joint pseudo-rigid body model cable-driven
标题 作者 时间 类型 操作
Measurement and analysis of typical motion error traces from a circular test
LI Xiaoli, LIU Huanlao
期刊论文
Motion capability analysis of a quadruped robot as a parallel manipulator
Jingjun YU,Dengfeng LU,Zhongxiang ZHANG,Xu PEI
期刊论文
Motion-based analysis for construction workers using biomechanical methods
Xincong YANG, Yantao YU, Heng LI, Xiaochun LUO, Fenglai WANG
期刊论文
Seismic ground motion analysis of Shanghai Pudong Airport site considering the effects of spatial correlation
JIANG Tong, CHEN Laiyun, XING Hailing, L? Xilin
期刊论文
Analysis of the kinematic characteristics of a high-speed parallel robot with Schönflies motion: Mobility
Fugui XIE,Xin-Jun LIU
期刊论文
Piezoelectric film-actuated motion platform with high resolution
HUA Shunming, ZHANG Hongzhuang, CHENG Guangming, FAN Zunqiang, LIU Jianfang
期刊论文
Singularity and workspace analysis of three isoconstrained parallel manipulators with schoenflies motion
Po-Chih LEE, Jyh-Jone LEE
期刊论文
Development of a masticatory robot using a novel cable-driven linear actuator with bidirectional motion
期刊论文
Synthesis of Intermittent-Motion Linkages with Slight Difference in Length Between Links
CHEN Xin-bo, YU Zhen
期刊论文