Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Floating Displacement-Force Conversion Mechanism as a Robotic Mechanism   To attach and detach permanent magnets with an operation force smaller than
their attractive force, Internally-Balanced Magnetic Unit (IB Magnet) has been
developed. The unit utilizes a nonlinear spring with an inverse characteristic
of magnetic attraction to produce a balancing force for canceling the internal
force applied on the magnet. This paper extends the concept of shifting the
equilibrium point of a system with a small operation force to linear systems
such as conventional springs. Aligning a linear system and its inverse
characteristic spring in series enables a mechanism to convert displacement
into force generated by a spring with theoretically zero operation force. To
verify the proposed principle, the authors realized a prototype model of
inverse characteristic linear spring with an uncircular pulley. Experiments
showed that the generating force of a linear spring can be controlled by a
small and steady operation force.

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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
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The categories of this paper are: stat
7
The categories of this paper are: hep-th
2
The categories of this paper are: math