Structure and performance analysis for AC-DC three degrees of freedom active magnetic bearings

2009 ◽  
Author(s):  
Dehong Zhu ◽  
Xin Cheng ◽  
Huangqiu Zhu
Keyword(s):  
Performance Analysis ◽  
Degrees Of Freedom ◽  
Magnetic Bearings ◽  
Active Magnetic Bearings ◽  
And Performance ◽  
Three Degrees Of Freedom

Optimal Design of a 3-DOF Parallel Micromanipulator

2009 ◽  
Author(s):  
Dan Zhang ◽  
Zhen Gao ◽  
Beizhi Li
Keyword(s):  
Fiber Optics ◽  
Biomedical Engineering ◽  
Degrees Of Freedom ◽  
Radial Basis Function Networks ◽  
Element Analysis ◽  
Optics Industry ◽  
And Performance ◽  
And Behavior ◽  
Resultant Stress ◽  
Three Degrees Of Freedom

A new compliant parallel micromanipulator is proposed in this paper. The manipulator has three degrees of freedom (DOF) and can generate motions in a microscopic scale. It can be used for biomedical engineering and fiber optics industry. In the paper, the detailed design of the structure is first introduced, followed by the kinematic analysis and performance evaluation. Second, a finite-element analysis of resultant stress, strain, and deformations is evaluated based upon different inputs of the three piezoelectric actuators. Finally, the genetic algorithms and radial basis function networks are implemented to search for the optimal architecture and behavior parameters in terms of global stiffness, dexterity and manipulability.

scholarly journals Nonanthropomorphic exoskeleton with legs based on eight-bar linkages

2018 ◽  
Vol 15 (1) ◽  
pp. 172988141875577 ◽  
Author(s):  
Jorge Curiel Godoy ◽  
Ignacio Juárez Campos ◽  
Lucia Márquez Pérez ◽  
Leonardo Romero Muñoz
Keyword(s):  
Inverse Kinematics ◽  
Degrees Of Freedom ◽  
Main Function ◽  
Polynomial Functions ◽  
Forward And Inverse Kinematics ◽  
And Performance ◽  
The Stability ◽  
Robotic Leg ◽  
Three Degrees Of Freedom ◽  
Difficulty Walking

This article presents the principles upon which a new nonanthropomorphic biped exoskeleton was designed, whose legs are based on an eight-bar mechanism. The main function of the exoskeleton is to assist people who have difficulty walking. Every leg is based on the planar Peaucellier–Lipkin mechanism, which is a one degree of freedom linkage. To be used as a robotic leg, the Peaucellier–Lipkin mechanism was modified by including two more degrees of freedom, as well as by the addition of a mechanical system based on toothed pulleys and timing belts that provides balance and stability to the user. The use of the Peaucellier–Lipkin mechanism, its transformation from one to three degrees of freedom, and the incorporation of the stability system are the main innovations and contributions of this novel nonanthropomorphic exoskeleton. Its mobility and performance are also presented herein, through forward and inverse kinematics, together with its application in carrying out the translation movement of the robotic foot along paths with the imposition of motion laws based on polynomial functions of time.

scholarly journals Configuration Synthesis and Performance Analysis of Finger Soft Actuator

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Ziqiang Zhang ◽  
Hanlong Chen ◽  
Zining Zhang
Keyword(s):  
Performance Analysis ◽  
Degrees Of Freedom ◽  
Simulation Analysis ◽  
Design Method ◽  
Synthesis Method ◽  
Soft Actuator ◽  
Physiological Structure ◽  
Binding Forces ◽  
Configuration Synthesis ◽  
And Performance

Compared with the traditional rigid finger actuator, the soft actuator has the advantages of light weight and good compliance. This type of finger actuator can be used for data acquisition or finger rehabilitation training, and it has broad application prospects. The motion differences between the soft actuator and finger may cause extrusion deformation at the binding point, and the binding forces along nonfunctional direction may reduce drive efficiency. In order to reduce the negative deformation of soft structure and improve comfort, the configuration synthesis and performance analysis of the finger soft actuator were conducted for the present work. The configuration synthesis method for soft actuator was proposed based on the analysis of the physiological structure of the finger, and the soft actuator can make the human-machine closed-loop structure including n joints (n=1, 2, 3) meet the requirement of DOF (degrees of freedom). Then the typical feasible configurations were enumerated. The different typical configurations were analyzed and compared based on the establishment of mathematical models and simulation analysis. Results show that the configuration design method is feasible. This study offers a theoretical basis for designing the configuration of finger soft actuator.

Modeling and Performance Analysis on the Five Degrees of Freedom Slice Hybrid Magnetic Bearing

2019 ◽  
Vol 29 (2) ◽  
pp. 1-5
Author(s):  
Tao Zhang ◽  
Xiaoting Ye ◽  
Lihong Mo ◽  
Chen Zhang ◽  
Qing Lu ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Degrees Of Freedom ◽  
Magnetic Bearing ◽  
And Performance

Kinematics Modeling of a Family of Pure Translational 3-P^UR Parallel Linear Manipulators

2010 ◽  
Author(s):  
Giovanni Boschetti ◽  
Roberto Caracciolo ◽  
Alberto Trevisani
Keyword(s):  
Analytical Solutions ◽  
Degrees Of Freedom ◽  
Kinematic Model ◽  
Performance Indexes ◽  
Kinematics Modeling ◽  
Linear Actuators ◽  
And Performance ◽  
Three Degrees Of Freedom

This paper introduces a simplified kinematic model for a family of parallel linear manipulators with three degrees of freedom of pure translation. The P^UR topology of the limbs and the adjustable layout of the linear actuators are the main characteristics of such a family. The analytical solutions of the forward and inverse position and velocity kinematics are presented. Then the variations of the manipulator features in terms of workspace and performance indexes are investigated as functions of the actuators arrangement.

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