Planar steering of a single ferrofluid drop by optimal minimum power dynamic feedback control of four electromagnets at a distance

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:323

Article

Probst, R.¹  Lin, J.¹  Komaee, A.¹  Nacev, A.¹  Cummins, Z.¹  Shapiro, B.¹ 

[1] Univ Maryland, Fischell Dept Bioengn, College Pk, MD 20742 USA

关键词: Magnetic particle;    Magnetic carrier;    Nanoparticle;    Ferrofluid;    Magnetic drug delivery;    Manipulation at a distance;    Control;    Feedback;    Electromagnet;    Dielectrophoresis;   

DOI  :  10.1016/j.jmmm.2010.08.024

来源: Elsevier

【 摘 要 】

Any single permanent magnet or electromagnet will always attract a magnetic fluid. For this reason it is difficult to precisely position and manipulate ferrofluid at a distance from magnets. We develop and experimentally demonstrate optimal(minimum electrical power) 2-dimensional manipulation of a single droplet of ferrofluid by feedback control of 4 external electromagnets. The control algorithm we have developed takes into account, and is explicitly designed for, the nonlinear (fast decay in space, quadratic in magnet strength) nature of how the magnets actuate the ferrofluid, and it also corrects for electromagnet charging time delays. With this control, we show that dynamic actuation of electromagnets held outside a domain can be used to position a droplet of ferrofluid to any desired location and steer it along any desired path within that domain-an example of precision control of a ferrofluid by magnets acting at a distance. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

Free