Finding All Solutions to Unconstrained Nonlinear Optimization for Approximate Synthesis of Planar Linkages Using Continuation Method

[+] Author and Article Information
A.-X. Liu

Nanjing Engineering Institute, Nanjing 210007, P.R. China

T.-L. Yang

Jinling Petrochemical Corporation, Nanjing 210042, P.R. China

J. Mech. Des 121(3), 368-374 (Sep 01, 1999) (7 pages) doi:10.1115/1.2829469 History: Received January 01, 1996; Revised November 01, 1998; Online December 11, 2007


Generally, approximate kinematic synthesis of planar linkage is studied using optimization method. But this method has two defects: i) the suitable initial guesses are hard to determine and ii) the global optimum solution is difficult to find. In this paper, a new method which can find all solutions to approximate kinematic synthesis of planar linkage is proposed. Firstly, we reduce the approximate synthesis problem to finding all solutions to polynomial equations. Polynomial continuation method is then used to find all solutions. Finally, all possible linkages can be obtained. Approximate syntheses of planar four-bar linkage for function generation, rigid-body guidance and path generation are studied in detail and three examples are given to illustrate the advantages of the proposed method.

Copyright © 1999 by The American Society of Mechanical Engineers
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