Type Synthesis of Mechanisms with Invariable Rotation Axes

2020 ◽  
pp. 151-182
Author(s):  
Tao Sun ◽  
Shuofei Yang ◽  
Binbin Lian
Keyword(s):  
Type Synthesis ◽  
Rotation Axes ◽  
Synthesis Of Mechanisms

A Method for Type Synthesis of Mechanisms Using Phase Diagrams

1994 ◽  
Author(s):  
Sio-Hou Lei ◽  
Ying-Chien Tsai
Keyword(s):  
Phase Diagram ◽  
Degrees Of Freedom ◽  
Practical Application ◽  
Type Synthesis ◽  
Planar Mechanisms ◽  
Simple Loop ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Spatial Mechanisms ◽  
Synthesis Of Mechanisms

Abstract A method for synthesizing the types of spatial as well as planar mechanisms is expressed in this paper by using the concept of phase diagram in metallurgy. The concept represented as a type synthesis technique is applied to (a) planar mechanisms with n degrees of freedom and simple loop, (b) spatial mechanisms with single degree of freedom and simple loop, to enumerate all the possible mechanisms with physically realizable kinematic pairs. Based on the technique described, a set of new reciprocating mechanisms is generated as a practical application.

Type Synthesis of Baranov Truss With Multiple Joints and Multiple-Joint Links

1998 ◽  
Author(s):  
Jinkui Chu ◽  
Weiqing Cao ◽  
Tingli Yang
Keyword(s):  
Computer Program ◽  
Synthesis Process ◽  
Type Synthesis ◽  
Program System ◽  
Structural Synthesis ◽  
Open Chain ◽  
Synthesis Of Mechanisms

Abstract The method called Single-Open-Chain (SOC) proposed in the literature is a very effective one for structural synthesis of mechanisms; in particular the method suits the synthesis process with the computer. In this paper, a new representation for mechanisms, called Double-Color-Graph (DCG) is introduced. Application of the SOC concept with the help of DCG representation, a new procedure for type synthesis for multiple joints and multiple-joint links, is presented. Baranov Trusses are extensively studied, which results in the finding of 158 independent types of Baranov Trusses with the number of loops being (1–4). A computer program system has been developed to generate all these types.

On a theory for the type synthesis of mechanisms

1966 ◽  
pp. 420-428 ◽  
Author(s):  
F. Freudenstein ◽  
L. Dobrjanskyj
Keyword(s):  
Type Synthesis ◽  
Synthesis Of Mechanisms

Evolutionary Design of Planar Kinematic Chains

1998 ◽  
Author(s):  
David R. Nielsen ◽  
Kazem Kazerounian
Keyword(s):  
Genetic Algorithm ◽  
Kinematic Chain ◽  
Type Synthesis ◽  
Kinematic Chains ◽  
Design Flexibility ◽  
Novel Approach ◽  
Chain Link ◽  
Synthesis Of Mechanisms ◽  
New Ideas ◽  
Crossover And Mutation

Abstract A procedure is developed to optimize planar mechanism type. A Genetic Algorithm is used to cycle populations of kinematic chain link adjacency matrices, through selection, crossover, and mutation. During this optimization, fit kinematic chains survive while unfit kinematic chains do not. Upon convergence, synthesized kinematic chains of high fitness remain. This technique was lead to be called the Genetic Algorithm for Type Synthesis (GATS). GATS introduces four new ideas for the type synthesis of mechanisms. First, it does not permute all possible kinematic chains. It searches for the best kinematic chains depending on a designer’s specifications. Second, larger size mechanisms can be generated because of the genetic algorithm’s evolutionary naturalness. Third, a novel approach was applied to genetic algorithms to allow the encodings to mutate in size. This allowed for addition or elimination of links in kinematic chains during evolution. Forth, a new property was deduced from mechanism topography that describes the mechanism design flexibility.

An Algorithm for Automatic Sketching of Planar Kinematic Chains

1985 ◽  
Vol 107 (1) ◽  
pp. 106-111 ◽  
Author(s):  
D. G. Olson ◽  
T. R. Thompson ◽  
D. R. Riley ◽  
A. G. Erdman
Keyword(s):  
Graph Theory ◽  
Line Graph ◽  
Kinematic Chain ◽  
Graph Representation ◽  
Synthesis Process ◽  
Line Graphs ◽  
Type Synthesis ◽  
Kinematic Chains ◽  
Synthesis Of Mechanisms ◽  
Computer Aided

One of the problems encountered in attempting to computerize type synthesis of mechanisms is that of automatically generating a computer graphics display of candidate kinematic chains or mechanisms. This paper presents the development of a computer algorithm for automatic sketching of kinematic chains as part of the computer-aided type synthesis process. Utilizing concepts from graph theory, it can be shown that a sketch of a kinematic chain can be obtained from its graph representation by simply transforming the graph into its line graph, and then sketching the line graph. The fundamentals of graph theory as they relate to the study of mechanisms are reviewed. Some new observations are made relating to graphs and their corresponding line graphs, and a novel procedure for transforming the graph into its line graph is presented. This is the basis of a sketching algorithm which is illustrated by computer-generated examples.

The Topological Analysis of Compliant Mechanisms

1994 ◽  
Author(s):  
Morgan D. Murphy ◽  
Ashok Midha ◽  
Larry L. Howell
Keyword(s):  
Rigid Body ◽  
Systematic Approach ◽  
Compliant Mechanisms ◽  
Topological Analysis ◽  
Synthesis Process ◽  
Second Phase ◽  
Functional Requirements ◽  
Type Synthesis ◽  
Body Type ◽  
Synthesis Of Mechanisms

Abstract Following the topological synthesis of mechanisms, a topological analysis constitutes the second phase of the type-synthesis process. Topological analysis involves investigating distinct ways of specifying inputs, outputs and joint types to satisfy the functional requirements. For compliant mechanisms, the number of possible input combinations is typically much greater than for their rigid-body counterparts. Therefore, a systematic approach to input specification is required. This paper deals primarily with the development of a systematic input specification procedure for compliant mechanisms, while building on the rigid-body type-synthesis techniques and the terminology previously established for compliant elements. The techniques developed are straightforward and may be easily automated.

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