2017 6th International Conference on Computer Applications In Electrical Engineering-Recent Advances (CERA),
Journal Year:
2023,
Volume and Issue:
11, P. 1 - 6
Published: Oct. 27, 2023
Globally,
aging
is
a
serious
problem
that
can
cause
conditions
such
as
movement
disorders,
stroke,
and
loss
of
mobility.
Spinal
cord
Injury
(SCI)
also
one
the
main
causes
mobility
disorders
among
human
beings.
Physical
therapy
significantly
used
to
help
people
with
some
need
involvement
nurse
or
physiotherapist.
Therefore,
it
desired
develop
rehabilitation
robotic
exoskeleton
regain
their
capabilities
will
limit
for
physiotherapist
nurse.
For
designing
an
system,
efficient
control
strategy
essential
requirement.
Here,
closed-loop
fractional-order-proportional
integral-derivative
(FO-PID)
scheme
employed
leg
(RRE)
plant.
A
nature-based
Grey
wolf
optimization
(GWO)
explored
getting
best
values
FO-PID
scheme.
Apart
from
this,
external
disturbance
has
been
induced
in
system
observe
performance.
The
resulting
are
compared
its
integer
counterpart
controller.
Mathematics,
Journal Year:
2025,
Volume and Issue:
13(1), P. 136 - 136
Published: Jan. 1, 2025
In
the
field
of
biomedical
engineering,
issue
drug
delivery
constitutes
a
multifaceted
and
demanding
endeavor
for
healthcare
professionals.
The
intravenous
administration
pharmacological
agents
to
patients
normalization
average
arterial
blood
pressure
(AABP)
desired
thresholds
represents
prevalent
approach
employed
within
clinical
settings.
automated
closed-loop
infusion
vasoactive
drugs
purpose
modulating
(BP)
in
suffering
from
acute
hypertension
has
been
focus
rigorous
investigation
recent
years.
previous
works
where
model-based
fuzzy
controllers
are
used
control
AABP,
rely
on
precise
mathematical
model,
while
entail
complexity
due
rule
sets.
To
overcome
these
challenges,
this
paper
presents
an
adaptive
system
AABP
by
adjusting
rate,
as
well
communication
time
delay
(CTD)
analyzing
wireless
connectivity
interruption
transferring
feedback
data
new
insight.
Firstly,
nonlinear
backstepping
controller
(NBC)
is
developed
continuously
using
real-time
feedback.
Secondly,
model-free
deep
reinforcement
learning
(MF-DRL)
algorithm
integrated
into
NBC
adjust
dynamically
coefficients
controller.
Besides
various
analyses
such
normal
condition
(without
CTD
strategy),
stability,
hybrid
noise,
analysis
implemented
illustrate
functionality
manner
data.
IEEE Transactions on Fuzzy Systems,
Journal Year:
2024,
Volume and Issue:
32(5), P. 3012 - 3025
Published: Feb. 15, 2024
This
article
is
devoted
to
solving
an
adaptive
finitetime
sampled-data
stabilization
problem
for
a
class
of
fractionalorder
nonlinear
systems
(FONSs).
By
taking
advantage
type-2
fuzzy
logic
(FLSs),
the
uncertainties
existed
in
considered
system
are
able
be
approximated,
and
one
stabilizer
(AFFSS),
which
possesses
switching
dynamics,
developed
by
following
backstepping
approach.
crucial
effects
those
"singularity
phenomenon"
happened
derivative
such
AFFSS
at
equilibrium
state
can
efficiently
avoided.
In
addition,
when
with
allowable
design
scalars
sampling
period
imposed
on
FONS,
closed-loop
under
consideration
reach
practically
finite-time
stable
(PFS),
it
verified
aid
selected
Lyapunov
function
candidate
(LFC).
end,
scheme
respectively
applied
numerical
engineering
examples
verify
its
effectiveness.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 3, 2025
The
current
research
introduces
a
model-free
ultra-local
model
(MFULM)
controller
that
utilizes
the
multi-agent
on-policy
reinforcement
learning
(MAOPRL)
technique
for
remotely
regulating
blood
pressure
through
precise
drug
dosing
in
closed-loop
system.
Within
system,
there
exists
MFULM
controller,
an
observer,
and
intelligent
MAOPRL
algorithm.
Initially,
flexible
is
created
to
make
adjustments
medication
dosages.
Following
this,
observer
incorporated
into
main
improve
performance
stability
by
estimating
states
disturbances.
parameters
are
optimized
using
adaptive
manner,
which
involves
use
of
actor-critic
approach
fashion.
This
enhances
adaptability
allowing
dynamic
modifications
dosage
control
parameters.
In
presence
disturbances
or
instabilities,
critic's
feedback
aids
actor
adjusting
actions
reduce
their
impact,
utilizing
complementary
strategy
tackle
deficiencies
primary
controller.
Lastly,
various
evaluations,
including
assessments
under
normal
conditions,
between
patients,
evaluations
against
mixed
disturbances,
have
been
carried
out
confirm
efficiency
viability
proposed
method.
