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Singularity loci of an orthogonal spherical two-degree-of-freedom parallel mechanism
Jialun YANG, Feng GAO,
《机械工程前沿（英文）》 2009年 第4卷 第4期 页码 379-385 doi: 10.1007/s11465-009-0075-0
关键词： 2-DOF orthogonal spherical parallel mechanism singularity loci self-motions
Reverse driving character of 2-DOF closed chain haptic device
GUO Wei-dong, GUO Xin, ZHANG Yu-ru
《机械工程前沿（英文）》 2006年 第1卷 第3期 页码 356-359 doi: 10.1007/s11465-006-0029-8
Hui YANG, Hairong FANG, Yuefa FANG, Xiangyun LI
《机械工程前沿（英文）》 2021年 第16卷 第1期 页码 46-60 doi: 10.1007/s11465-020-0606-2
关键词： 5-DOF hybrid manipulator reconfigurable base large workspace dimensional synthesis optimal design
Precision control system of two-DOF stage with linear ultrasonic motor
ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng
《机械工程前沿（英文）》 2008年 第3卷 第4期 页码 421-425 doi: 10.1007/s11465-008-0063-9
关键词： settling position accuracy PI control control algorithm orthogonal
Synthesis of spherical parallel manipulator for dexterous medical task
Abdelbadia CHAKER, Abdelfattah MLIKA, Med Amine LARIBI, Lotfi ROMDHANE, Sa?d ZEGHLOUL
《机械工程前沿（英文）》 2012年 第7卷 第2期 页码 150-162 doi: 10.1007/s11465-012-0325-4
This paper deals with the design and the analysis of a spherical parallel manipulator (SPM) for a haptic minimally invasive surgery application. First the medical task was characterized with the help of a surgeon who performed a suture technique called anastomosis. A Vicon system was used to capture the motion of the surgeon, which yielded the volume swept by the tool during the anastomosis operation. The identified workspace can be represented by a cone with a half vertex angle of 26°. A multi objective optimization procedure based on genetic algorithms was then carried out to find the optimal SPM. Two criteria were considered, i.e., task workspace and mechanism dexterity. The optimized SPM was then analyzed to determine the error on the orientation of the end effector as a function of the manufacturing errors of the different links of the mechanism.
关键词： spherical parallel manipulator (SPM) anastomosis haptic motion capture optimization workspace dexterity genetic algorithm manufacturing errors
Osvaldo PENISI,José BOCCA,Horacio AGUILAR,Pedro BOCCA
《机械工程前沿（英文）》 2015年 第10卷 第3期 页码 221-232 doi: 10.1007/s11465-015-0347-9
In the mechanized harvest of vines, grape berries are detached through the vibration to the structure supporting the clusters. According to the kind of guide selected, the clusters require one or two vibration directions in the structure. For guiding in parral structures, vibration is necessary in two directions or planes: One perpendicular to the other. The guide branches producing the clusters develop in these planes, and the guiding is called H-guiding. Mechanism theory indicates that a mechanism has as many degrees of freedom as its actuators, and an actuator is needed to achieve a certain vibration. Having the smallest number of possible actuators is beneficial in reducing moving parts and achieving more compact and easily controllable mecha-nisms. In this case, a single degree-of-freedom mechanism is proposed. It is capable of generating vibrations on two planes: One perpendicular to the other. This mechanism is the sum of two link mechanisms on perpendicular planes with a common outlet located at the output rod of the mechanism where the actuator is found. As the distance between the soil and the elements containing the clusters is not constant, a system has been designed to measure the accelerations at the bars and the rocker to validate the acceleration values that detach the grape berries in a prototype in a lab experiment, to ensure that the acceleration needed for pulling the grape berries are produced at any contact point of the bar.
Operation analysis of a Chebyshev-Pantograph leg mechanism for a single DOF biped robot
Conghui LIANG, Marco CECCARELLI, Yukio TAKEDA
《机械工程前沿（英文）》 2012年 第7卷 第4期 页码 357-370 doi: 10.1007/s11465-012-0340-5
In this paper, operation analysis of a Chebyshev-Pantograph leg mechanism is presented for a single degree of freedom (DOF) biped robot. The proposed leg mechanism is composed of a Chebyshev four-bar linkage and a pantograph mechanism. In contrast to general fully actuated anthropomorphic leg mechanisms, the proposed leg mechanism has peculiar features like compactness, low-cost, and easy-operation. Kinematic equations of the proposed leg mechanism are formulated for a computer oriented simulation. Simulation results show the operation performance of the proposed leg mechanism with suitable characteristics. A parametric study has been carried out to evaluate the operation performance as function of design parameters. A prototype of a single DOF biped robot equipped with two proposed leg mechanisms has been built at LARM (Laboratory of Robotics and Mechatronics). Experimental test shows practical feasible walking ability of the prototype, as well as drawbacks are discussed for the mechanical design.
Optimal design of a linkage–cam mechanism-based redundantly actuated parallel manipulator
《机械工程前沿（英文）》 2021年 第16卷 第3期 页码 451-467 doi: 10.1007/s11465-021-0634-6
关键词： redundant actuation parallel manipulator linkage–cam mechanism Jacobian optimal design
Stiffness of a 3-degree of freedom translational parallel kinematic machine
null
《机械工程前沿（英文）》 2014年 第9卷 第3期 页码 233-241 doi: 10.1007/s11465-014-0312-z
In this paper, a typical 3-degree of freedom (3-DOF) translational parallel kinematic machine (PKM) is studied and analyzed whose tool platform has only translations along X-, Y- and Z-axes. It consists of three limbs, each of which have arm and forearm with prismatic-revolute-revolute-revolute (PRRR) joints. Inverse kinematics analysis is carried out to find the slider coordinates and joint angles for a given position of tool platform. Stiffness modeling is done based on the compliance matrices of arm and forearm of each limb. Using the stiffness modeling the variations of minimum and maximum translational stiffness in the workspace are analyzed. For various architectural parameters of the 3-DOF PKM the tendency of variations on the minimum and maximum stiffness over the entire workspace is studied; and also the deflections of the tool platform along X, Y, and Z directions with respect to various forces are presented.
关键词： 3-DOF translational PKM inverse kinematics stiffness modeling translational stiffness
《机械工程前沿（英文）》 2021年 第16卷 第4期 页码 765-781 doi: 10.1007/s11465-021-0655-1
关键词： generalized parallel mechanism configurable moving platform gripper mechanism type synthesis kinematic analysis
Baochen WEI, Feng GAO
《机械工程前沿（英文）》 2012年 第7卷 第2期 页码 109-119 doi: 10.1007/s11465-012-0323-6
Working capacity refers to the velocity output and force output of a manipulator. It is usually be represented by output capacity space. In this paper, the method of Linear Programming and a geometric method are proposed to calculate working capacity spaces in different situations. With the consideration of gravity effect of every component, the output force capacity space of heavy duty manipulators is calculated. The results show that the effect of the gravity is a translation of the capacity space. This paper gives a method for the output capacity express especially for heavy duty manipulators. The output capacity space can be helpful to the driving parameters selection. With the consideration of the gravity effect of every component and the friction at the joints, the excavating force capacity space of the heavy-load excavating mechanism is calculated and is represented as a multi-dimensional polytope. The results show that the effect of the gravity and friction is to translational act on the capacity space.
关键词： working capacity multi-DOF manipulator capacity polytope excavating mechanism
A rolling 3-UPU parallel mechanism
Zhihuai MIAO, Yan’an YAO, Xianwen KONG
《机械工程前沿（英文）》 2013年 第8卷 第4期 页码 340-349 doi: 10.1007/s11465-013-0282-6
A novel rolling mechanism is proposed based on a 3-UPU parallel mechanism in this paper. The rolling mechanism is composed of two platforms connected by three UPU (universal-prismatic-universal) serial-chain type limbs. The degree-of-freedom of the mechanism is analyzed using screw theory. Gait analysis and stability analysis are presented in detail. Four rolling modes of the mechanism are discussed and simulated. The feasibility of the rolling mechanism is verified by means of a physical prototype. Finally, its terrain adaptability is enhanced through planning the rolling gaits.
Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO
《机械工程前沿（英文）》 2020年 第15卷 第1期 页码 66-80 doi: 10.1007/s11465-019-0570-x
关键词： parallel mechanism redundant mechanism large rotational angles machine tools 2R1T spindle head collaborative manipulator
Contribution to the design of robotized tele-echography system
T. ESSOMBA, M. A. LARIBI, J. P. GAZEAU, S. ZEGHLOUL, G. POISSON
《机械工程前沿（英文）》 2012年 第7卷 第2期 页码 135-149 doi: 10.1007/s11465-012-0326-3
This paper introduces the design of a master-slave robotized system for tele-ultrasound application. The objective of these researches is to design the slave manipulator of this system and its control device (master part). The specification process of the architecture kinematic is based on the analysis of expert’s gesture during ultrasound examinations. These studies have been carried out using a motion capture system. The medical gestures were analyzed in terms of ultrasound probe attitude and used in the definition of the kinematics specifications of the proposed manipulator. The Spherical Parallel Mechanism is selected because its characteristics meet the constraint requirements. The optimal synthesis of spherical parallel manipulators is performed using a real-coded Genetic Algorithm based method. Simulations on the actuator responses of the structure allowed us the validate it. In order to control this robot, we have also designed a haptic device that provides easiness to use as well as force feedback. Its orientation control strategy is based on a use of an adaptative kalman filter which efficiency was demonstrated during experimentations.
关键词： tele-echography motion capture spherical parallel mechanism genetic algorithm adaptative kalman filter
Preload characteristics identification of the piezoelectric-actuated 1-DOF compliant nanopositioning
Ruizhou WANG, Xianmin ZHANG
《机械工程前沿（英文）》 2015年 第10卷 第1期 页码 20-36 doi: 10.1007/s11465-015-0328-z
Packaged piezoelectric ceramic actuators (PPCAs) and compliant mechanisms are attractive for nanopositioning and nanomanipulation due to their ultra-high precision. The way to create and keep a proper and steady connection between both ends of the PPCA and the compliant mechanism is an essential step to achieve such a high accuracy. The connection status affects the initial position of the terminal moving plate, the positioning accuracy and the dynamic performance of the nanopositioning platform, especially during a long-time or high-frequency positioning procedure. This paper presents a novel external preload mechanism and tests it in a 1-degree of freedom (1-DOF) compliant nanopositioning platform. The 1-DOF platform utilizes a parallelogram guiding mechanism and a parallelogram load mechanism to provide a more accurate actual input displacement and output displacement. The simulation results verify the proposed stiffness model and dynamic model of the platform. The values of the preload displacement, actual input displacement and output displacement can be measured by three capacitive sensors during the whole positioning procedure. The test results show the preload characteristics vary with different types or control modes of the PPCA. Some fitting formulas are derived to describe the preload displacement, actual input displacement and output displacement using the nominal elongation signal of the PPCA. With the identification of the preload characteristics, the actual and comprehensive output characteristics of the PPCA can be obtained by the strain gauge sensor (SGS) embedded in the PPCA.
关键词： nanopositioning preload characteristic packaged piezoelectric ceramic actuator compliant mechanism
标题 作者 时间 类型 操作
Singularity loci of an orthogonal spherical two-degree-of-freedom parallel mechanism
Jialun YANG, Feng GAO,
期刊论文
Reverse driving character of 2-DOF closed chain haptic device
GUO Wei-dong, GUO Xin, ZHANG Yu-ru
期刊论文
Dimensional synthesis of a novel 5-DOF reconfigurable hybrid perfusion manipulator for large-scale spherical
Hui YANG, Hairong FANG, Yuefa FANG, Xiangyun LI
期刊论文
Precision control system of two-DOF stage with linear ultrasonic motor
ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng
期刊论文
Synthesis of spherical parallel manipulator for dexterous medical task
Abdelbadia CHAKER, Abdelfattah MLIKA, Med Amine LARIBI, Lotfi ROMDHANE, Sa?d ZEGHLOUL
期刊论文
One DOF mechanism for the mechanical harvest of vines in an arbor structure and the validation of the
Osvaldo PENISI,José BOCCA,Horacio AGUILAR,Pedro BOCCA
期刊论文
Operation analysis of a Chebyshev-Pantograph leg mechanism for a single DOF biped robot
Conghui LIANG, Marco CECCARELLI, Yukio TAKEDA
期刊论文
Design and analysis of the gripper mechanism based on generalized parallel mechanisms with configurable
期刊论文
A method to calculate working capacity space of multi-DOF manipulator and the application in excavatingmechanism
Baochen WEI, Feng GAO
期刊论文
Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotational
Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO
期刊论文
Contribution to the design of robotized tele-echography system
T. ESSOMBA, M. A. LARIBI, J. P. GAZEAU, S. ZEGHLOUL, G. POISSON
期刊论文
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