Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new active disturbance controller based on an improved fraction-order
  extended state observer   This paper proposes a new fraction-order active disturbance rejection
controller based on an improved fraction-order extended state observer (IFESO)
for a class of fraction-order systems. Applying the IFESO, the fraction-order
system can be approximated as an integer-order integrator (1/s). The parameters
that ensure the stability of the IFESO and closed-loop system are provided. The
frequency-domain analysis shows that the IFADRC has a stronger disturbance
estimation performance for the fraction-order system than an integer-order
active disturbance rejection controller (IADRC). The simulation results
demonstrates that the proposed IFADRC behaves better than the IADRC and the
FADRC.

33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org