Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distributed Global Output-Feedback Control for a Class of Euler-Lagrange
  Systems   This published paper investigates the distributed tracking control problem
for a class of Euler-Lagrange multi-agent systems when the agents can only
measure the positions. In this case, the lack of the separation principle and
the strong nonlinearity in unmeasurable states pose severe technical challenges
to global output-feedback control design. To overcome these difficulties, a
global nonsingular coordinate transformation matrix in the upper triangular
form is firstly proposed such that the nonlinear dynamic model can be partially
linearized with respect to the unmeasurable states. And, a new type of velocity
observers is designed to estimate the unmeasurable velocities for each system.
Then, based on the outputs of the velocity observers, we propose distributed
control laws that enable the coordinated tracking control system to achieve
uniform global exponential stability (UGES). Both theoretical analysis and
numerical simulations are presented to validate the effectiveness of the
proposed control scheme. Followed by the original paper, a typo and a mistake
is corrected.

3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat