Motion Analysis of Wave Glider Based on Multibody Dynamic Theory

2017 ◽  
pp. 721-734 ◽  
Author(s):  
Xiao-tao Li ◽  
Fang Liu ◽  
Li Wang ◽  
Hu-qing She
Keyword(s):  
Motion Analysis ◽  
Dynamic Theory ◽  
Multibody Dynamic ◽  
Wave Glider

scholarly journals Analysis and Selection of Deployment Methods for a Wave Glider System

2020 ◽  
Vol 8 (7) ◽  
pp. 529
Author(s):  
Xiuyuan Wang ◽  
Zongyu Chang ◽  
Zhongqiang Zheng ◽  
Jiakun Zhang ◽  
Zhanxia Feng ◽  
...  
Keyword(s):  
Dynamic Method ◽  
Vertical Plane ◽  
Characteristic Analysis ◽  
Motion Equations ◽  
Marine Energy ◽  
Multibody Dynamic ◽  
Wave Glider ◽  
Ocean Environment ◽  
Marine Vehicle ◽  
Selection Of

A wave glider is a novel unmanned marine vehicle which can convert marine energy into kinetic energy. In practice, it is crucial for the wave glider system to deploy into the ocean environment efficiently and safely. Hence, the present work establishes the wave glider motion equations to analyze the deployment method. Firstly, the wave glider model is simplified in the vertical plane and the cable model is defined as mass nodes connected with a massless spring. Then, two typical deployment methods (Method 1 and Method 2) are proposed based on the multibody dynamic method, and the numerical simulation model is established to investigate the kinematic performance of two deployment methods. Lastly, the dynamic characteristic analysis is conducted to select the determined deployment method. We explain the practical advantages of Method 1, which would provide the reference for the deployment method selection.

Calculation of many-beam dynamic electron diffraction without high-energy approximation

1996 ◽  
Vol 54 ◽  
pp. 128-129
Author(s):  
B. R. Ahn ◽  
N. J. Kim
Keyword(s):  
Electron Diffraction ◽  
Flat Surface ◽  
Dynamic Theory ◽  
High Energy ◽  
Perfect Crystal ◽  
Zone Axis ◽  
Beam Dynamic ◽  
Diffraction Angle ◽  
Energy Approximation ◽  
The Many

High energy approximation in dynamic theory of electron diffraction involves some intrinsic problems. First, the loss of theoretical strictness makes it difficult to comprehend the phenomena of electron diffraction. Secondly, it is difficult to believe that the approximation is reasonable especially in the following cases: 1) when accelerating voltage is not sufficiently high, 2) when the specimen is thick, 3) when the angle between the surface normal of the specimen and zone axis is large, and 4) when diffracted beam with large diffraction angle is included in the calculation. However, until now the method to calculate the many beam dynamic electron diffraction without the high energy approximation has not been proposed. For this reason, the authors propose a method to eliminate the high energy approximation in the calculation of many beam dynamic electron diffraction. In this method, a perfect crystal with flat surface was assumed. The method was applied to the calculation of [111] zone axis CBED patterns of Si.

The Science in Hume's Science of Man

2020 ◽  
Vol 18 (3) ◽  
pp. 257-271
Author(s):  
Tamás Demeter
Keyword(s):  
Comparative Analysis ◽  
Philosophy Of Science ◽  
Dynamic Theory ◽  
Newtonian Dynamic ◽  
The Mind

This paper sketches a recently emerging divide between two interpretations of Hume's methodology and philosophy of science. On the first interpretation Hume relies on an inductive methodology and provides a (Newtonian) dynamic theory of the mind, and his philosophy of science reflects this methodology. On the second, Hume relies on inferences to the best explanation via comparative analysis of instances, and offers an anatomy of the mind relying on a chemical and organic imagery. The paper also aspires to lean the reader's sympathies toward the latter interpretation while outlining some of its potential consequences for the character of Hume's psychology, the limits of associationism, and his empiricism.

Shoulder Joint Motion Analysis of Daily Living Activities Using a Global Coordinate System

2013 ◽  
Vol 50 (10) ◽  
pp. 840-844
Author(s):  
Yukiya INOUE ◽  
Mayumi KIHARA ◽  
Junko YOSHIMURA ◽  
Naoki YOSHIDA ◽  
Kenji MATSUMOTO ◽  
...  
Keyword(s):  
Coordinate System ◽  
Motion Analysis ◽  
Shoulder Joint ◽  
Daily Living ◽  
Global Coordinate System ◽  
Joint Motion ◽  
Daily Living Activities
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