Kinematics Analysis of Working Edge Point for Inner Disc Cutter in Cutterhead of Tunneling Machine

2013 ◽  
Vol 405-408 ◽  
pp. 3293-3297 ◽  
Author(s):  
Qi Xing Wu ◽  
Hong Wei Ma
Keyword(s):  
Coordinate Transformation ◽  
Disc Cutter ◽  
Kinematics Analysis ◽  
Edge Point ◽  
Rotating Speed ◽  
Movement Characteristics ◽  
Space Coordinate ◽  
Tunneling Machine ◽  
Trajectory Equation ◽  
Motion Behavior

Based on the analysis of movement characteristics of inner disc cutter in tunneling machine cutterhead, a trajectory equation to describe the motion behavior of working edge point of inner disc cutter in the process of tunneling is derived by using the method of space coordinate transformation matrix. The trajectory equation mainly considers the parameters of position variables of disc cutter, cutter radius, cutterhead rotating speed and advance speed.

Kinematics Analysis of Working Edge Point for Gauge Disc Cutter in Cutterhead of Tunneling Machine

2014 ◽  
Vol 580-583 ◽  
pp. 1232-1237
Author(s):  
Qi Xing Wu ◽  
Guan Feng Tian ◽  
Lin Chen ◽  
Hong Wei Ma
Keyword(s):  
Coordinate Transformation ◽  
Motion Equation ◽  
Disc Cutter ◽  
Kinematics Analysis ◽  
Edge Point ◽  
Tunneling Process ◽  
Rotating Speed ◽  
Movement Characteristics ◽  
Space Coordinate ◽  
Tunneling Machine

Based on the analysis of movement characteristics of gauge disc cutter in cutterhead of tunneling machine, the motion equation to describe the working behavior of the edge point of gauge disc cutter in tunneling process is deduced by using the method of space coordinate transformation matrix. The motion equation has the advantages of considering more parameters, such as position variables of disc cutter, cutter radius, cutterhead rotating speed and advance speed.

The Design and Kinematics Analysis of Four-Bar Linkage of Micro-Swing Engine

2014 ◽  
Vol 875-877 ◽  
pp. 1199-1204
Author(s):  
Ye Tian
Keyword(s):  
Theoretical Basis ◽  
Kinematics Analysis ◽  
Kinematics Model ◽  
Movement Characteristics ◽  
Swing Movement ◽  
The Dead ◽  
Swing Engine ◽  
Four Bar Linkage

Based on the movement characteristics,the four-bar mechanism of Micro-swing Engine was designed.The mechanism transform swing movement into rotary motion.With the kinematics model,the moving law of four-bar mechanism was analyzied.And simulate the machinery with computer to abtain the movement of curve of four-bar mechanism.The results show that the four-bar mechanism of Micro-swing Engine running smoothly and the inertia can be overcome the dead point.This will provides the theoretical basis for four-bar mechanism of Micro-swing Engine.

The Study of Blanking Frequency Effect on the Acceleration Performance of Impact Testing Machine Rotor

2014 ◽  
Vol 543-547 ◽  
pp. 150-153
Author(s):  
Yuan Bo Cai ◽  
Fang Zhao ◽  
Shi Jian Li ◽  
Na Zhao
Keyword(s):  
High Speed ◽  
Testing Machine ◽  
Impact Testing ◽  
Frequency Effect ◽  
Rotating Speed ◽  
Impact Testing Machine ◽  
Movement Characteristics ◽  
The Impact ◽  
Feed Inlet

This paper designed an impact testing machine to observe the movement characteristics of particles. We simulated the rotor with different blanking frequency and different rotating speed by EDEM to explore the acceleration of the rotor. Through simulation, blanking frequency could have an impact on the rotor acceleration of testing machine, and the greater Blanking frequency was, the more obvious hanging material phenomenon was. Increasing the diameter of feed inlet could ease the phenomenon of hanging material, but would decrease particles speed. Therefore, we should not only avoid the phenomenon of hanging material, but also make the particles get high speed when designing the impact testing machine.

Kinematics Analysis and Simulation of the 4-DOF Tilter

2012 ◽  
Vol 184-185 ◽  
pp. 282-286 ◽  
Author(s):  
Hai Dong Wang ◽  
Kai Zhang ◽  
Yu Quan Bi ◽  
Kui Huang ◽  
Bing Heng Yang
Keyword(s):  
Coordinate Transformation ◽  
Degrees Of Freedom ◽  
Kinematics Analysis ◽  
Moving Platform

This paper proposed a type of new parallel tilter with four degrees-of-freedom, whose moving platform has three rotations and one translation. The coordinate transformation is adopted to establish the position and velocity kinematics equation of the tilter. Simulation result indicated that the moving platform can move according to the set law by modifying the displacement of the piston rod in active limb.

New Low-Speed Motor with Interior Pushrod Harmonic Transmission Device - Theoretical Profile Deduction and Kinematics Analysis

2014 ◽  
Vol 945-949 ◽  
pp. 310-313
Author(s):  
Xiao Lan Yang ◽  
Ji Feng Liu ◽  
Han Song Liu ◽  
Li Lin ◽  
Meng Nan Si
Keyword(s):  
Low Cost ◽  
Parameters Optimization ◽  
Analysis Method ◽  
Kinematics Analysis ◽  
Low Speed ◽  
Theoretical Profile ◽  
Cam Mechanism ◽  
Movement Characteristics ◽  
Profile Equation ◽  
Kinematics Parameters

A pushrod harmonic institution which is consisted of harmonic planetary and cam mechanism is proposed. As a result, speed-down device of low-speed motor is changed from external installed to interior installed. Design goals of the transmission with small size, light weight and low cost is achieved. Based on the mechanism principle analysis, the theoretical profile equation of the pushrod roller is deduced, then the displacement, velocity and acceleration equation of a random points are got by the analysis method. It is helpful to analyze the change of each motion parameters and the amplitude for the influence of the movement characteristics, at the same time provides evidence for mechanism simulation, kinematics parameters optimization and high-quality manufacturing of the equipment.

Numerical Modeling of the TBM Disc Cutter’s Kinematic Behavior during its Wear Process and Experimental Verification

2013 ◽  
Vol 321-324 ◽  
pp. 51-56 ◽  
Author(s):  
Qing Tan ◽  
Zhen Huan Zhu ◽  
Yi Min Xia ◽  
Lv Jian Xie ◽  
Xin Jian Sun ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Zero Point ◽  
Rock Cutting ◽  
Rock Breaking ◽  
Disc Cutter ◽  
Fem Model ◽  
Wear Process ◽  
Rotating Speed ◽  
Kinematic Behavior ◽  
Simulation Results

In order to determine the disc cutter’s kinematic behavior, a 3-D FEM model is established to simulate the rock cutting process in Abaqus, using a unique connector element and considering the failure effect of the rock. Then, by using this model, a series of numerical simulations during disc cutter’s wearing process have been performed. The results show that the speed zero point is jumping near the deepest rock breaking point, the rotating speed of the disc cutter varies while it is cutting rock and the average rotating speed increases during its wear process. In the end, the laboratory test is presented in detail, and the experiment results are in accordance with the simulation results.

scholarly journals Novel antenna concepts via coordinate transformation

2013 ◽  
Vol 2 (1) ◽  
pp. 25 ◽  
Author(s):  
P.-H. Tichit ◽  
S. N. Burokur ◽  
X. Wu ◽  
D. Germain ◽  
A. De Lustrac
Keyword(s):  
Coordinate Transformation ◽  
Electromagnetic Waves ◽  
Near Field ◽  
Antenna Design ◽  
Electromagnetic Properties ◽  
Field Pattern ◽  
Radiation Properties ◽  
Space Coordinate ◽  
And Control ◽  
Far Field Pattern

Coordinate transformation is an emerging field which offers a powerful and unprecedented ability to manipulate and control electromagnetic waves. Using this tool, we demonstrate the design of novel antenna concepts by tailoring their radiation properties. The wave manipulation is enabled through the use of engineered dispersive composite metamaterials that realize the space coordinate transformation. Three types of antennas are considered for design: a directive, a beam steerable and a quasi-isotropic one. Numerical simulations together with experimental measurements are performed in order to validate the coordinate transformation concept. Near-field cartography and far-field pattern measurements performed on a fabricated prototype agree qualitatively with Finite Element Method (FEM) simulations. It is shown that a particular radiation pattern can be tailored at ease into a desired one by modifying the electromagnetic properties of the space around radiator. This idea opens the way to novel antenna design techniques for various application domains such as the aeronautical and transport fields.

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