An Update on M- and K-Circle Theory for Planar Dyads and Triads

Author:

Mlinar John R.1,Erdman Arthur G.2

Affiliation:

1. 3M Company, 900 Bush Avenue, St. Paul, MN 55144

2. Department of Mechanical Engineering University of Minnesota, Minneapolis, MN 55112

Abstract

M and K circles are solution loci for three design positions of a dyad when one design angle is varied. This paper updates M- and K-circle theory through a geometric explanation of why regions without solutions, known as forbidden regions, exist for the case of path generation with prescribed timing and not for the case of motion generation. The extension of M-K circle theory to the linear solution of triads is also presented. This work presents the finding of circular solution curves for the linear solution of triads along with the conditions for forbidden regions.

Publisher

ASME International

Subject

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

Reference7 articles.

1. Advanced Mechanism Design: Analysis and Synthesis;Sandor

2. On the Existence of Circle-Point and Center-Point Circles for Three-Precision-Point-Dyad Synthesis;Loerch;ASME J. Mech. Des.

3. Loerch, R. J. , 1977, “Extensions of Revolute Dyad Synthesis for Three Finitely Displaced Positions,” Master’s thesis, University of Minnesota, Minneapolis, Minnesota.

4. Lin, C. S. , 1987, “Dimensional Synthesis of a Planar Triad for Six Precision Positions,” Ph.D. dissertation, University of Minnesota, Minneapolis, Minnesota.

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