MiniMag: A Hemispherical Electromagnetic System for 5-DOF Wireless Micromanipulation. Kratochvil, B. E., Kummer, M. P., Erni, S., Borer, R., Frutiger, D. R., Schürle, S., & Nelson, B. J. In Khatib, O., Kumar, V., & Sukhatme, G., editors, Experimental Robotics: The 12th International Symposium on Experimental Robotics, pages 317–329. Springer, Berlin, Heidelberg, 2014.
MiniMag: A Hemispherical Electromagnetic System for 5-DOF Wireless Micromanipulation [link]Paper  doi  abstract   bibtex   
The MiniMag is a magnetic manipulation system capable of 5 degree-of-freedom (5-DOF) wireless magnetic control of an untethered microrobot (3-DOF position, 2-DOF pointing orientation). The system has a spherical workspace with an intended diameter of approximately 10 mm, and is completely unrestrained in the rotational degrees-of-freedom. This is accomplished through the superposition of multiple magnetic fields, and capitalizes on a linear representation of the coupled field contributions of multiple softmagnetic- core electromagnets acting in concert. The prototype system consists of 8 stationary electromagnets with ferromagnetic cores, and is capable of producing magnetic fields in excess of 20 mT and field gradients in excess of 2 T/m at frequencies up 2 kHz.
@incollection{kratochvil_minimag_2014,
	address = {Berlin, Heidelberg},
	title = {{MiniMag}: {A} {Hemispherical} {Electromagnetic} {System} for 5-{DOF} {Wireless} {Micromanipulation}},
	isbn = {978-3-642-28572-1},
	shorttitle = {{MiniMag}},
	url = {https://doi.org/10.1007/978-3-642-28572-1_22},
	abstract = {The MiniMag is a magnetic manipulation system capable of 5 degree-of-freedom (5-DOF) wireless magnetic control of an untethered microrobot (3-DOF position, 2-DOF pointing orientation). The system has a spherical workspace with an intended diameter of approximately 10 mm, and is completely unrestrained in the rotational degrees-of-freedom. This is accomplished through the superposition of multiple magnetic fields, and capitalizes on a linear representation of the coupled field contributions of multiple softmagnetic- core electromagnets acting in concert. The prototype system consists of 8 stationary electromagnets with ferromagnetic cores, and is capable of producing magnetic fields in excess of 20 mT and field gradients in excess of 2 T/m at frequencies up 2 kHz.},
	language = {en},
	urldate = {2024-10-24},
	booktitle = {Experimental {Robotics}: {The} 12th {International} {Symposium} on {Experimental} {Robotics}},
	publisher = {Springer},
	author = {Kratochvil, Bradley E. and Kummer, Michael P. and Erni, Sandro and Borer, Ruedi and Frutiger, Dominic R. and Schürle, Simone and Nelson, Bradley J.},
	editor = {Khatib, Oussama and Kumar, Vijay and Sukhatme, Gaurav},
	year = {2014},
	doi = {10.1007/978-3-642-28572-1_22},
	pages = {317--329},
}

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