Conceptual design and dimensional synthesis for a 3-DOF module of the TriVariant-a novel 5-DOF reconfigurable hybrid robot

2005 ◽  
Vol 21 (3) ◽  
pp. 449-456 ◽  
Author(s):  
T. Huang ◽  
M. Li ◽  
X.M. Zhao ◽  
J.P. Mei ◽  
D.G. Chetwynd ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Dimensional Synthesis

Conceptual Design and Dimensional Synthesis of a Reconfigurable Hybrid Robot

2004 ◽  
Vol 127 (3) ◽  
pp. 647-653 ◽  
Author(s):  
Meng Li ◽  
Tian Huang ◽  
Dawei Zhang ◽  
Xueman Zhao ◽  
S. Jack Hu ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Parallel Mechanism ◽  
Two Dimensional ◽  
Dimensional Synthesis ◽  
One Dimensional ◽  
Reconfigurable Robots ◽  
Fixed Base ◽  
Dimensional Version ◽  
Dimensional Parameters ◽  
Moving Platform

This paper deals with the conceptual design of a novel four-degree-of-freedom (dof) modularized robot which is composed of a 2-dof parallel mechanism plus a 2-dof rotating head attached to the moving platform. Patented with the name Bicept, the robot is the two-dimensional version of the Tricept robot and is designed as a reconfigurable module that can readily be integrated with 1-dof feed mechanism or a fixed base in order to form a set of reconfigurable robots with parallel-serial architecture. The dimensional synthesis of the 2-dof parallel mechanism as a component of the Bicept robot is also carried out by solving a one-dimensional nonlinear equation associated with the strut-length constraint. The dimensional parameters corresponding to various width-height ratios of the work space are obtained via examples.

Conceptual Design and Dimensional Synthesis of a Novel 2-DOF Translational Parallel Robot for Pick-and-Place Operations

2003 ◽  
Vol 126 (3) ◽  
pp. 449-455 ◽  
Author(s):  
Tian Huang ◽  
Zhanxian Li ◽  
Meng Li ◽  
Derek G. Chetwynd ◽  
Clement M. Gosselin
Keyword(s):  
Conceptual Design ◽  
High Speed ◽  
Parallel Robot ◽  
Rechargeable Batteries ◽  
Parallel Robots ◽  
Dimensional Synthesis ◽  
Long Distance ◽  
Conceptual Design Phase ◽  
Pick And Place ◽  
Index Subject

This paper deals with the conceptual design and optimal dimensional synthesis of a novel 2-DOF translational parallel robot for pick-and-place operations. In a conceptual design phase, the conditions for generating such kinds of parallel robots are investigated, leading to the invention of a 2-D version of the Delta robot. Combining this robot with a 1-DOF feed mechanism, a hybrid robot can be created which is particularly suitable for transporting objects at very high speed in a plane plus a relatively slow or step-by-step, yet long distance motion, normal to the plane. The kinematic optimality of the 2-DOF translational parallel robot is achieved by minimizing a global and comprehensive conditioning index subject to a set of appropriate constraints. The application of this robot to the development of a device for quality inspection of rechargeable batteries is used to demonstrate its applicability.

Simultaneous Type and Dimensional Synthesis of Mechanisms by Genetic Algorithms

1994 ◽  
Author(s):  
W. Eugene Fang
Keyword(s):  
Genetic Algorithms ◽  
Conceptual Design ◽  
Problem Formulation ◽  
Optimization Techniques ◽  
Dimensional Synthesis ◽  
Design Problems ◽  
New Approach ◽  
Search Optimization ◽  
As Species ◽  
Synthesis Of Mechanisms

Abstract Based on global search/optimization techniques called genetic algorithms, a new approach to the conceptual design of mechanisms is proposed. Emulating “natural” genetics and selection, competing types of mechanisms are treated as species and different dimensions are evaluated for each type simultaneously. The problem formulation is straight-forward, similar to an optimization problem. The result may be a spectrum of similar or different mechanisms, depending on whether multiple optimal solutions exist. The computational power required to utilize this approach is acceptable for most conceptual design problems.

Conceptual design and dimensional synthesis of “MicroHand”

2008 ◽  
Vol 43 (9) ◽  
pp. 1186-1197 ◽  
Author(s):  
Shuxin Wang ◽  
Longwang Yue ◽  
Qunzhi Li ◽  
Jienan Ding
Keyword(s):  
Conceptual Design ◽  
Dimensional Synthesis

scholarly journals Kinematic Conceptual Design of In-Line Four-Cylinder Variable Compression Ratio Engine Mechanisms Considering Vertical Second Harmonic Acceleration

2020 ◽  
Vol 10 (11) ◽  
pp. 3765 ◽  
Author(s):  
Seung Woo Kwak ◽  
Jae Kyung Shim ◽  
Young Kwang Mo
Keyword(s):  
Conceptual Design ◽  
Compression Ratio ◽  
Second Harmonic ◽  
Design Method ◽  
Industrial Applications ◽  
Design Stage ◽  
Dimensional Synthesis ◽  
Design Factor ◽  
Variable Compression Ratio ◽  
Variable Compression

In the in-line four-cylinder engine, it is well known that the shaking force is due to the vertical second harmonic acceleration components of the pistons. This paper proposes a kinematic conceptual design method to determine the kinematic structure of a feasible in-line four-cylinder variable compression ratio (VCR) engine and its dimensions that would yield a lower vertical second harmonic acceleration at joints. Through type and dimensional synthesis, candidate VCR engine mechanisms are chosen and their dimensions satisfying design specifications are determined. Based on the analysis of the vertical second harmonic acceleration components at the joints, a feasible mechanism for an in-line four-cylinder VCR engine is selected. Then, the method finds the dimensions that yield a nearly minimized sum of the vertical second harmonic acceleration at each joint by adjusting the link lengths within specified tolerances. For validation, the result is compared with that of a constrained optimization using MATLAB. The proposed method would be useful at the conceptual design stage of multi-link multi-cylinder VCR and variable-stroke engine mechanisms where the second harmonic acceleration is an important design factor in the automotive industrial applications.

Innovative Conceptual Design

2001 ◽  
Author(s):  
Ehud Kroll ◽  
Sridhar S. Condoor ◽  
David G. Jansson
Keyword(s):  
Conceptual Design

ANALYSIS OF COMPETING VARIANTS OF AIR CONDITIONING SYSTEMS WITHOUT AIR EXTRACTION FROM ENGINES AT THE STAGE OF PASSENGER AIRCRAFT ONBOARD SYSTEMS CONCEPTUAL DESIGN

2019 ◽  
Vol 6 (3) ◽  
pp. 80-85
Author(s):  
Denis Igorevich Smagin ◽  
Konstantin Igorevich Starostin ◽  
Roman Sergeevich Savelyev ◽  
Anatoly Anatolyevich Satin ◽  
Anastasiya Romanovna Neveshkina ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Air Conditioning ◽  
Research University ◽  
Cooling System ◽  
Fuel Efficiency ◽  
Air Cooling ◽  
Moscow Aviation Institute ◽  
Air Conditioning System ◽  
Low Efficiency ◽  
Air Conditioning Systems

One of the ways to achieve safety and comfort is to improve on-board air conditioning systems.The use of air cooling machine determines the air pressure high level at the point of selection from the aircraft engine compressor. Because of the aircraft operation in different modes and especially in the modes of small gas engines, deliberately high stages of selection have to be used for ensuring proper operation of the refrigeration machine in the modes of the aircraft small gas engines. Into force of this, most modes of aircraft operation have to throttle the pressure of the selected stage of selection, which, together with the low efficiency of the air cycle cooling system, makes the currently used air conditioning systems energy inefficient.A key feature of the architecture without air extraction from the main engines compressors is the use of electric drive compressors as a source of compressed air.A comparative analysis of competing variants of on-board air conditioning system without air extraction from engines for longrange aircraft projects was performed at the Moscow Aviation Institute (National Research University).The article deals with the main approaches to the decision-making process on the appearance of a promising aircraft on-board air conditioning system at the stage of its conceptual design and formulated the basic requirements for the structure of a complex criterion at different life cycle stages.The level of technical and technological risk, together with a larger installation weight, will require significant costs for development, testing, debugging and subsequent implementation, but at the same time on-board air conditioning system scheme without air extraction from the engines will achieve a significant increase in fuel efficiency at the level of the entire aircraft.

Conceptual Design of Geophysical Microsatellite

2014 ◽  
Vol 10 (6) ◽  
pp. 5-15
Author(s):  
S.A. Matviyenko ◽  
Keyword(s):  
Conceptual Design
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