Design of an Electromagnetic Setup for Independent Three-Dimensional Control of Pairs of Identical and Nonidentical Microrobots

F. Ongaro, Stefano Pane, Stefano Scheggi, S. Misra

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    11 Citations (Scopus)
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    Abstract

    Independent control of microrobots is a cardinal challenge for manipulation at micro/nano scale. In this paper, we design and assemble an electromagnetic setup to overcome some of the major obstacles in the independent control of microrobots. The demanding magnetic requirements are met by the presented experimental testbed that is able to produce magnetic fields and gradients of, respectively, 160 mT and 3.6 T/m at the center of the workspace. Through the design process of this testbed, we analyze the importance of design parameters and derive a quantitative analysis of the requirements for the dissipation of the generated heat. Further, we present and develop the model and software infrastructure, capable of running at 25 Hz, necessary for independent control of multiple microrobots. We also introduce two novel techniques for current-minimizing mapping of the desired forces into currents at the electromagnet. Finally, the capabilities of the setup are demonstrated through independent control of two, both identical and nonidentical, soft-magnetic microspheres in three-dimensional space—with average root mean square errors of 102 μ m and peak velocities of up to 331 μ m/s.
    Original languageEnglish
    Article number8525258
    Pages (from-to)174-183
    Number of pages10
    JournalIEEE transactions on robotics
    Volume35
    Issue number1
    Early online date6 Nov 2018
    DOIs
    Publication statusPublished - Feb 2019

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