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Tracking a nanosize magnetic particle using a magnetic force Dimitar Baronov, Sean B. Andersson and John Baillieul
 

Summary: Tracking a nanosize magnetic particle using a magnetic force
microscope
Dimitar Baronov, Sean B. Andersson and John Baillieul
Abstract-- A scheme for tracking nano-sized magnetic par-
ticles using a magnetic force microscope (MFM) is introduced.
The stray magnetic field of the particle induces a shift in the
phase of the oscillation of the MFM tip. The magnitude of this
shift depends on the distance between the tip and the particle
and can be expressed as a spatial field. We present a control
law which steers the tip to a level set of this field. The approach
is based on the previous work of two of the authors on a novel
method for mapping unknown potential fields using sensor-
enabled mobile robots. Because the method involves geometric
properties of the field and its domain, it is not surprising that
it can be applied to problems where the characteristic length
scales are small. Additionally, we introduce to the original
control law an adaptive term to compensate for uncertainties
in the parameter values in the model of the magnetic force. The
efficacy of this approach is illustrated through simulation. This
approach to tracking will provide the capability to investigate

  

Source: Andersson, Sean B. - Department of Aerospace and Mechanical Engineering, Boston University

 

Collections: Engineering