A biomechanical analysis of switch stand operation using a two-dimensional dynamic model

1991 ◽  
Vol 24 (3-4) ◽  
pp. 257
Author(s):  
Maury Nussbaum ◽  
Don B. Chaffin ◽  
George Page ◽  
James Foulke ◽  
Charles Woolley
Keyword(s):  
Dynamic Model ◽  
Biomechanical Analysis ◽  
Two Dimensional

A Granular Dynamic Model for the Degradation of Material

2004 ◽  
Vol 126 (3) ◽  
pp. 606-614 ◽  
Author(s):  
N. Fillot ◽  
I. Iordanoff ◽  
Y. Berthier
Keyword(s):  
Dynamic Model ◽  
Normal Pressure ◽  
Two Dimensional ◽  
Third Body ◽  
Stable Layer ◽  
Sliding Speed ◽  
Particle Detachment ◽  
Physicochemical Interactions

The work presented here is a model of the degradation of a material (by particle detachment), based on a two dimensional granular dynamic model designed to study the flows of third body particles inside a contact. As the detached particles (third body) cannot exit the contact, the detachments stop after a certain time and a stable layer of third body can be seen. It is shown that the thickness of this stable layer depends both on the conditions applied (normal pressure and sliding speed) and the physicochemical interactions between the detached particles. Such investigations provide better understanding of the mechanism leading to the degradation of material.

Two-dimensional dynamic model of a copper sulphide ore bed

2003 ◽  
Vol 71 (1-2) ◽  
pp. 67-74 ◽  
Author(s):  
M Sidborn ◽  
J Casas ◽  
J Martı́nez ◽  
L Moreno
Keyword(s):  
Dynamic Model ◽  
Copper Sulphide ◽  
Two Dimensional ◽  
Sulphide Ore

scholarly journals Development of a two-dimensional dynamic model of the foot-ankle system exposed to vibration

2020 ◽  
Vol 99 ◽  
pp. 109547 ◽  
Author(s):  
D. Chadefaux ◽  
K. Goggins ◽  
C. Cazzaniga ◽  
P. Marzaroli ◽  
S. Marelli ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Two Dimensional

Modeling and Grasp Stability Analysis for Object Manipulation by Soft Rolling Fingertips

2014 ◽  
Vol 11 (03) ◽  
pp. 1450020 ◽  
Author(s):  
John Fasoulas ◽  
Michael Sfakiotakis
Keyword(s):  
Stability Analysis ◽  
Dynamic Model ◽  
Object Manipulation ◽  
Kinematics And Dynamics ◽  
Control Law ◽  
Two Dimensional ◽  
Orientation Control ◽  
Grasp Stability ◽  
Different Types ◽  
General Dynamic

This paper presents a general dynamic model that describes the two-dimensional grasp by two robotic fingers with soft fingertips. We derive the system's kinematics and dynamics by incorporating rolling constraints that depend on the deformation and on the rolling distance characteristics of the fingertips' material. We analyze the grasp stability at equilibrium, and conclude that the rolling properties of the fingertips can play an important role in grasp stability, especially when the width of the grasped object is small compared to the radius of the tips. Subsequently, a controller, which is based on the fingertips' rolling properties, is proposed for stable grasping concurrent with object orientation control. We evaluate the dynamic model under the proposed control law by simulations and experiments that make use of two different types of soft fingertip materials, through which it is confirmed that the dynamic model can successfully capture the effect of the fingertips' deformation and their rolling distance characteristics. Finally, we use the dynamic model to demonstrate by simulations the significance of the fingertips' rolling properties in grasping thin objects.

Two-dimensional gas-dynamic model of laser ablation in an ambient gas

2000 ◽  
Vol 154-155 ◽  
pp. 66-72 ◽  
Author(s):  
A.V. Gusarov ◽  
A.G. Gnedovets ◽  
I. Smurov
Keyword(s):  
Laser Ablation ◽  
Dynamic Model ◽  
Two Dimensional ◽  
Gas Dynamic ◽  
Ambient Gas

Chatter in the Strip Rolling Process, Part 1: Dynamic Model of Rolling

1998 ◽  
Vol 120 (2) ◽  
pp. 330-336 ◽  
Author(s):  
I-S. Yun ◽  
W. R. D. Wilson ◽  
K. F. Ehmann
Keyword(s):  
Dynamic Model ◽  
Coulomb Friction ◽  
Rolling Force ◽  
Rolling Process ◽  
Rate Of Change ◽  
Two Dimensional ◽  
Entry And Exit ◽  
Strip Rolling ◽  
Coulomb Friction Law ◽  
Rolling Torque

This paper presents the development of a new dynamic model of the rolling process which provides estimates of the variations in exit gage, strip speed and tension at entry and exit, rolling force and rolling torque in response to variations in roll separation as well as the rate of change of the roll spacing. This two-dimensional dynamic model employs the Tresca friction factor approach instead of Amontons-Coulomb friction law.

A two-dimensional modular deployable truss structure with bistability

2018 ◽  
Vol 30 (3) ◽  
pp. 335-350 ◽  
Author(s):  
Jong-Eun Suh ◽  
Suk-Yong Jeong ◽  
Jae-Hung Han
Keyword(s):  
Dynamic Model ◽  
Dynamic Models ◽  
Truss Structure ◽  
Design Parameters ◽  
Two Dimensional ◽  
Operational Flexibility ◽  
Camera System ◽  
Deployable Structure ◽  
Packaging Efficiency ◽  
And Behavior

In this article, a new concept of two-dimensional modular deployable truss structure is proposed. To eliminate additional needs of containment mechanism, the proposed deployable structure is designed to have bistable characteristics so that it can stay robust both in the stowed and deployed states. The deployment of each module is triggered by the actuation of shape memory alloys. Static and dynamic models of the proposed deployable structure are established to analyze the characteristics and behavior of the system. The packaging ratio of the proposed structure is analyzed in terms of the design parameters. The results of static and packaging efficiency analysis show that the proposed concept has operational flexibility and high packaging efficiency. Verification of the dynamic model is performed based on a comparison of the response of the dynamic model and the actual deployment process of an experimental model; the deployment process is captured using a stereo pattern recognition camera system. It is shown that the established dynamic model can accurately describe the deployment behavior of the proposed structure.

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