Applied Sciences,
Journal Year:
2022,
Volume and Issue:
12(19), P. 10072 - 10072
Published: Oct. 7, 2022
With
the
increasingly
serious
environmental
pollution
and
stricter
emission
standards,
energy
saving
reduction
in
construction
machinery
(CM)
are
imminent.
Electrification
of
CM
is
an
inevitable
trend.
Due
to
complicated
working
conditions
violent
load
fluctuations,
existing
motor
controller
cannot
adapt
well
operating
characteristics
electric
CM.
In
this
paper,
work
requirements
positive
flow
system
analyzed.
Considering
robustness
resistance
disturbance
control
system,
a
vector
strategy
through
online
tuning
speed
PI
parameters
based
on
fuzzy
proposed.
The
analyzed
with
co-simulation
AMESim
MATLAB/Simulink.
A
test
rig
was
set
up
verify
feasibility
strategy.
results
show
that
when
variable,
fluctuation
rotation
approximately
1.5%
PI,
2.5%
traditional
PI.
Furtherly,
algorithm
tested
system.
fluctuates
drastically,
within
3.5%,
steady-state
error
only
0.3%.
IEEE Transactions on Cybernetics,
Journal Year:
2024,
Volume and Issue:
54(9), P. 5451 - 5462
Published: April 1, 2024
In
this
article,
a
novel
approach
of
prescribed
performance
synchronization
control
is
developed
for
heterogeneous
nonlinear
multiagent
systems
(MASs)
subject
to
unknown
actuator
faults.
Considering
that
not
all
followers
are
able
access
the
information
leader,
distributed
auxiliary
perception
system
proposed
estimate
state
leader
guarantee
estimation
errors
converge
zero
within
fixed
time.
Then,
based
on
estimated
states,
fault-tolerant
(FTC)
proposed,
which
achieves
user-defined
specifications
even
in
presence
Moreover,
as
accurate
dynamic
models
perhaps
hard
acquire
practical
engineering,
data-based
method
by
using
reinforcement
learning
(RL)
algorithm
design
controller,
only
needs
off-policy
online
data
and
independent
model
dynamics
followers.
The
stability
with
behavior
guaranteed
through
Lyapunov
theorem.
Finally,
simulation
results
presented
illustrate
effectiveness
controller.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(4), P. 994 - 994
Published: Feb. 7, 2025
This
paper
proposes
a
variable
mechanism
structure
based
on
ball
screw
design
for
precise
displacement
control
in
axial
piston
pumps,
with
the
objective
of
improving
actuator
position
and
velocity
within
displacement-controlled
(DC)
systems.
Traditional
valve-controlled
cylinder
mechanisms
(VCCVM)
often
suffer
from
limited
precision
over
swash
plate
due
to
numerous
uncertain
parameters
hydraulic
system.
To
address
this
issue,
is
utilized
replace
original
control,
enhancing
accuracy
responsiveness.
In
addition,
an
in-depth
analysis
Ball
Screw
Variable
Mechanism
(BSVM)
conducted,
leading
development
coupled
mechanical-hydraulic
dynamic
model.
Based
model,
controller
designed
improve
system
performance.
Finally,
effectiveness
high
performance
proposed
new
strategy
were
validated
through
comparative
experiments
simulations.
The
experimental
results
confirm
advantages
design,
demonstrating
satisfactory
improvements
precision.
International Journal of Robust and Nonlinear Control,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 4, 2025
ABSTRACT
This
article
investigates
the
prescribed
performance
control
(PPC)
problem
for
a
class
of
uncertain
strict‐feedback
systems
with
unknown
time‐varying
direction
and
actuator
faults.
A
low‐complexity
scheme
which
contains
novel
determination
approach
is
proposed
herein.
Compared
mainstream
methods
such
as
Nussbaum
gain
parameter
estimation,
newly
overcomes
challenge
caused
by
faults
in
controller
design.
First,
distance
function
defined,
upon
mechanism
identifying
developed.
Combined
PPC‐based
law,
state
feedback
fault‐tolerant
under
coefficient
designed.
Subsequently,
utilizing
idea
proof
contradiction,
it
has
been
proven
that
this
scheme,
system
tracking
error
can
be
maintained
within
predefined
criteria,
while
ensuring
boundedness
any
closed‐loop
signals.
Lastly,
effectiveness
merits
conventional
are
verified
two
sets
simulation
examples,
respectively.
