A Graph Grammar Approach for Structure Synthesis of Mechanisms

Author:

Schmidt Linda C.1,Shetty Harshawardhan1,Chase Scott C.2

Affiliation:

1. Department of Mechanical Engineering, University of Maryland, College Park, MD 20742-3035 USA

2. Key Centre of Design Computing, Department of Architectural and Design Science, University of Sydney, NSW 2006 Australia

Abstract

This paper presents a general graph grammar methodology for structure synthesis of mechanisms. Much of current mechanism design is based on a systematic method popularized by Freudenstein, Mruthyunjaya, and Tsai (among others). A graph grammar is a more natural expression for a method that relies on algebraic abstractions of graph theoretic principles. Our proposed grammar rules add vertices and loops to a start graph to obtain desired structural requirements. A grammar adaptation of an existing linear time algorithm for the detection of isomorphism is presented. Also presented is a specialized grammar for the structure synthesis of Epicyclic Gear Trains. A valid graph grammar for structure synthesis of mechanisms enables both the eventual automation of general atlas construction and atlas construction for customized mechanism classes. [S1050-0472(00)01904-8]

Publisher

ASME International

Subject

Computer Graphics and Computer-Aided Design,Computer Science Applications,Mechanical Engineering,Mechanics of Materials

Reference33 articles.

1. Chironis, N. P., 1991, Mechanisms & Mechanical Devices Source Book, McGraw-Hill, New York.

2. Crossley, F. R. E., 1965, “The Permutation of Kinematic Chains of Eight Members or Less from the Graph-Theoretic Viewpoint,” Developments in Theoretical and Applied Mechanics, Vol. 2, Pergamon Press, pp. 467–486.

3. Freudenstein, F., and Dobrjanskyj, L., 1965, “On a Theory for the Type Synthesis for Mechanisms,” Proceedings of the 11th International Congress of Applied Mechanics, Springer-Verlag, pp. 420–428.

4. Shetty, H., 1998, “A Graph Grammar Approach for Structure Synthesis of Mechanisms,” MS thesis, University of Maryland.

5. Tsai, L-W., 1996, “Class Notes: Systematic Design of Mechanisms,” The University of Maryland College Park.

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