A new optimal structural boundary modification algorithm in the multi-objective topology optimization of microgripper

Document Type : Research Article

Authors

Faculty of Mechanical Engineering, Semnan University, Semnan, Iran

Abstract

In industries where manufacturing and assembly operations are to be carried out with a high degree of precision on a micro scale, precise control and movement of components on a micro scale are desperately needed. Integrated microgripper mechanisms are used for this purpose. In this paper, a compliant-based microgripper is designed using multi-objective topology optimization method and the final form of the mechanism is prepared for manufacturing using a new optimal structural boundary modification algorithm. Usually, the optimization faces some problems in the designing step of the structure topology, such as node to node joining rather than the correct joining of the elements, as well as staircase boundaries due to the analysis of the problem with the finite element method. To overcome these drawbacks, in this paper, the curve fitting method is used to minimize the sum of squared errors in the boundary profile of the structure; meanwhile, the optimized objective functions of the structure are improved and better results are obtained. Finally, the performance results of the microgripper are confirmed using the comparison between numerical simulations and empirical tests.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 53, Issue 4
July 2021
Pages 2261-2270

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