This
study
investigates
an
output
tracking
problem
of
networked
control
systems
(NCSs)
with
network
constraints
(containing
delays
and
packets
dropouts).
A
high-order
fully
actuated
(HOFA)
system
model
is
applied
to
describe
the
dynamics
NCSs.
Correspondingly,
observer-based
HOFA
(OB-HOFA)
predictive
scheme
proposed
solve
this
problem.
In
scheme,
a
observer
designed
estimate
immeasurable
states,
then
incremental
(IHOFA)
prediction
constructed
by
using
Diophantine
equation,
such
that
optimization
compensation
are
completed
via
multi-step
predictions.
numerical
simulation
air-bearing
spacecraft
simulator
provided
demonstrate
feasibility
OB-HOFA
scheme.
IEEE Transactions on Industrial Informatics,
Journal Year:
2024,
Volume and Issue:
20(4), P. 6935 - 6945
Published: Jan. 29, 2024
This
article
addresses
the
output
tracking
of
networked
high-order
fully
actuated
(NHOFA)
systems
under
random
denial-of-service
(DoS)
attacks,
where
an
independent
Bernoulli
process
is
used
to
denote
possibility
launching
DoS
attacks
in
sensor
controller
(SNC)
and
actuator
(NCA)
channels.
A
successful
attack
leads
data
losses
disorders
SNC
NCA
secure
predictive
control
method
given
implement
security
tracking.
In
this
method,
a
(HOFA)
model
applied
establish
dynamics
systems,
which
called
NHOFA
systems.
Then,
incremental
HOFA
(IHOFA)
prediction
constructed
via
Diophantine
Equation,
such
that
multistep
predictions
are
obtained
achieve
optimization
performance
compensation
disorders.
simple
condition
proposed
analyze
stability
closed-loop
experiment
air-bearing
spacecraft
simulator
taken
illustrate
feasibility
method.
International Journal of Systems Science,
Journal Year:
2024,
Volume and Issue:
55(9), P. 1947 - 1958
Published: March 14, 2024
The
present
study
focuses
on
controller
design
for
high-order
fully
actuated
systems
that
experience
input
saturation
and
are
affected
by
bounded
disturbances,
such
as
nonlinear
uncertainties
time-varying
unknown
parameters.
A
saturated
adaptive
is
developed
via
the
system
approach
Lyapunov
stability
theory
to
achieve
output
control
reject
disturbances.
disturbances
treated
an
extended
state
then
estimated
introducing
observer.
An
variable
used
handle
estimation
error
between
actual
values
of
auxiliary
designed
mitigate
effect.
Lyapunov's
direct
method
verifies
error,
tracking
state,
will
eventually
stabilise
within
a
ellipsoid.
illustration
spacecraft
attitude
demonstrates
effectiveness
proposed
controller.
IEEE/CAA Journal of Automatica Sinica,
Journal Year:
2024,
Volume and Issue:
11(5), P. 1262 - 1273
Published: April 15, 2024
This
study
examines
the
stabilization
issue
of
extended
chained
nonholonomic
systems
(ECNSs)
with
external
disturbance.
Unlike
existing
approaches,
we
transform
considered
system
into
a
fully
actuated
(FAS)
model,
simplifying
stabilizing
controller
design.
We
implement
separate
design
and
propose
exponential
finite-time
under
disturbance
observer
(FTDO)
for
two
inputs.
In
addition,
discuss
specifics
global
control
Our
approach
demonstrates
that
states
exponentially
or
asymptotically
converge
to
zero
provided
switching
strategy,
while
all
other
within
finite
time.
International Journal of Systems Science,
Journal Year:
2024,
Volume and Issue:
55(12), P. 2556 - 2569
Published: Feb. 17, 2024
Under
the
framework
of
high-order
fully
actuated
(HOFA)
system
theory,
this
study
investigates
a
spacecraft
flying-around
problem
in
sight
coordinate
system.
In
system,
nonlinear
HOFA
model
is
applied
to
establish
relative
dynamics
flying-around,
such
that
presented
mission
can
be
transformed
into
tracking
control
systems.
A
predictive
approach
correspondingly
proposed
deal
with
problem.
Concretely,
nonlinearities
eliminated
construct
linear
by
utilising
full
actuation
characteristic,
and
then
incremental
(LIHOFA)
prediction
constructed
applying
Diophantine
equation
replace
reduced-order
model.
Based
on
LIHOFA
model,
multi-step
ahead
predictions
are
developed
optimise
performance,
so
realisation
guaranteed.
sufficient
necessary
condition
derived
in-depth
discussion
maintain
stability
performance
closed-loop
Furthermore,
numerical
simulation
comparison
about
circular
elliptical
orbits
provided
verify
feasibility
approach.
To
highlight
its
practicability,
an
experimental
verification
via
air-bearing
(ABS)
simulator
shown
for
implementation
mission.
IEEE Access,
Journal Year:
2024,
Volume and Issue:
12, P. 114465 - 114479
Published: Jan. 1, 2024
In
the
aerospace
field,
researchers
and
engineers
have
been
using
attitude
simulators
to
test
evaluate
spacecraft
control
algorithms,
usually
developed
at
design
stage.
Moreover,
thanks
new
technological
achievements,
small
satellites
can
include
more
complex
algorithms
in
their
determination
systems.
consequence,
development
of
an
simulator
that
is
able
perform
different
with
high
accuracy
stability
demand.
this
paper,
automatic
balancing
method,
along
a
modified
Model
Reference
Adaptive
Control
architecture
for
uncertain
dynamical
system
unknown
perturbation,
was
address
uncertainty
suppression
disturbance
rejection
air-bearing
spherical
simulator.
The
main
feature
proposed
scheme
consists
obtaining
estimates
offset
vector
generated
by
unbalanced
mass
order
reduce
it
moving
masses
each
principal
axis,
ensuring
improving
motion
performance
adaptive
controller
input
error
modification.
Simulation
results
were
conducted
according
parameters
satellite
1U-class
CubeSat
platform
inside
structure.
This
paper
studies
the
practical
prescribed-time
tracking
control
problem
for
air-bearing
testbed
system
with
output
constraints.
By
constructing
function
and
time-varying
barrier
Lyapunov
functions,
controller
is
designed.
It
proved
that
proposed
can
make
errors
converge
to
an
arbitrarily
small
neighbourhood
of
zero
in
a
prescribed
time
under
disturbance,
signals
are
bounded.
Finally,
effectiveness
method
validated
by
numerical
simulation
testbed.
