Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The albatross optimized flight is an extremum seeking phenomenon:
  autonomous and stable controller for dynamic soaring   The albatross optimized flight maneuver - known as Dynamic Soaring (DS) - is
nothing but a wonder of physics, biology, and engineering. In an ideal DS
cycle, this fascinating bird can travel in the desired flight direction, for
free, by harvesting energy from the wind, and thus, it achieves a neutral
energy cycle. This phenomenon has triggered a momentous interest among
aerospace, control and robotic engineering communities; if DS is mimicked, we
have arrived at a new class of Unmanned Aerial Vehicles (UAVs) which are very
energy-efficient during part, or the full, duration of their flight. However,
the DS problem is highly nonlinear, under-actuated, and dependent on the wind
profiles. This have resulted in decades of DS control literature that, while
making progress addressing the control problem, seem not to be aligned well
with the nature of the DS phenomenon itself. The control works associated with
DS in literature rely heavily on constrained optimal control algorithms,
control designs that require a mathematical expression of the objective
function, and pre-defined wind profile models. Clearly, a functioning
controller for DS that allows meaningful bio-mimicry of the albatross, needs to
be autonomous, real time, stable, and capable of tolerating absence of the
expression of the objective function. The qualifications of such controller are
the very same characteristics of Extremum Seeking Control (ESC) systems. In
this paper, we show that Extremum Seeking Control (ESC) systems existing in
control literature for decades are a natural characterization for the DS
problem. We provide the DS problem setup, design, stability, and simulation
results of the introduced ESC systems. The results, supported by comparison
with optimal control solvers, emphasize that the DS phenomenon is a natural
expression of ESC systems in nature and that DS can be performed autonomously
and in real time.

11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph