Optimum Synthesis of Mechanisms Using Tabu-Gradient Search Algorithm

[+] Author and Article Information
Ahmad A. Smaili

Department of Mechanical Engineering,  American University of Beirut, P. O. Box 11-0236, Riad El Solh 1107 2020, Beirut, Lebanonasmaili@aub.edu.lb

Nadim A. Diab, Naji A. Atallah

Department of Mechanical Engineering,  American University of Beirut, P. O. Box 11-0236, Riad El Solh 1107 2020, Beirut, Lebanon

J. Mech. Des 127(5), 917-923 (Nov 29, 2004) (7 pages) doi:10.1115/1.1904640 History: Received August 31, 2004; Revised November 29, 2004

A tabu-gradient search is herein presented for optimum synthesis of planar mechanisms. The solution generated by a recency-based, short term memory tabu search is used to start a gradient search to drive the solution ever closer to the global minimum. A brief overview of the tabu-search method is first presented. A tabu-gradient algorithm is then used to synthesize four-bar mechanisms for path generation tasks by way of three examples, including two benchmark examples used before to test other deterministic and intelligent optimization schemes. Compared with the corresponding results generated by other schemes, the tabu-gradient search rendered the most optimal solutions of all.

Copyright © 2005 by American Society of Mechanical Engineers
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Figure 1

Flowchart of major steps in a TS algorithm

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Figure 2

Parameters of the RRRR linkage used in the text

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Figure 3

Flowchart for tabu-gradient search algorithm

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Figure 4

Optimal RRRR obtained by tabu-gradient search

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Figure 5

Possible reasons for attaining a better solution by the tabu-gradient algorithm

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Figure 6

Coupler curve generated by the tabu-gradient optimal mechanism

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Figure 7

Desired coupler points and the coupler curves generated by tabu-gradient and GA-FL optimal mechanisms



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