Research on design and control method of active vibration isolation system based on piezoelectric Stewart platform
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 6, 2025
Abstract
Space
payloads
in
orbit
are
vulnerable
to
small
vibrations
from
satellite
platforms,
which
can
degrade
their
performance.
Traditional
methods
typically
involve
installing
a
passive
vibration
isolation
system
between
the
platform
and
payload.
However,
such
systems
usually
effective
only
for
high-frequency,
large-amplitude
perform
poorly
isolating
low-frequency
resonances
below
10
Hz.
To
address
this
limitation,
paper
proposes
an
active
using
6-degrees-of-freedom
Stewart
driven
by
piezoelectric
actuators.
First,
characteristics
of
analyzed
modeled,
with
deformation
displacement
each
leg
calculated
through
decoupling,
allowing
high-precision
servo
control.
Next,
given
inherent
hysteretic
nonlinearity
ceramics,
significantly
affects
positioning
accuracy,
hysteresis
mechanism
actuators
is
analyzed,
phenomenological
mathematical
model
based
on
Bouc–Wen
operators
established.
A
Modified
particle
swarm
optimization
(MPSO)
method
proposed
identifying
model’s
nonlinear
parameters,
enhancing
efficiency.
Finally,
feedforward
inverse
compensation
feedback
linearization
introduced.
Experimental
results
verify
that
designed
active–passive
greatly
improves
both
accuracy
performance
platform.
Язык: Английский
Flexible, Visual, and Multifunctional Humidity-Strain Sensors Based on Ultra-Stable Perovskite Luminescent Filaments
Advanced Fiber Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 28, 2025
Язык: Английский
Highly sensitive and omnidirectional anisotropic piezoelectric sensors based on oriented PbZr0.52Ti0.48O3 fibers with intrinsic flexibility
Journal of Alloys and Compounds,
Год журнала:
2025,
Номер
unknown, С. 179905 - 179905
Опубликована: Март 1, 2025
Язык: Английский
Study on assembly characteristics of an assembled wind tunnel balance with four triaxial-force piezoelectric sensors
Measurement,
Год журнала:
2025,
Номер
unknown, С. 117496 - 117496
Опубликована: Апрель 1, 2025
Язык: Английский
Conducting Polymers-Based Gas Sensors: Principles, Materials, and Applications
Sensors,
Год журнала:
2025,
Номер
25(9), С. 2724 - 2724
Опубликована: Апрель 25, 2025
Conducting
polymers
(CPs)
have
emerged
as
promising
materials
for
gas
sensors
due
to
their
organic
nature
coupled
with
unique
and
versatile
optical,
electrical,
chemical,
electrochemical
properties.
This
review
provides
a
comprehensive
overview
of
the
latest
developments
in
conducting
polymer-based
sensors.
First,
fundamental
sensing
mechanisms
CPs-based
are
elucidated,
covering
diverse
transduction
modes
including
electrochemical,
chemiresistive,
piezoelectric,
field-effect
transistor-based
sensing.
Next,
various
types
employed
sensors,
such
polypyrrole,
polyaniline,
polythiophene,
composites
introduced,
emphasis
on
synthesis
methods,
structural
characteristics,
response
Finally,
wide
range
applications
these
is
discussed,
spanning
industrial
process
control,
environmental
monitoring,
food
safety,
biomedical
diagnosis,
other
fields,
well
existing
issues
long-term
stability
humidity
interference,
summary
biocompatibility
regulatory
standards
conductive
provided.
By
integrating
insights
from
mechanisms,
materials,
applications,
this
offers
holistic
understanding
It
also
highlights
future
research
directions,
device
miniaturization,
AI-assisted
identification,
multifunctional
integrated
systems,
wearable
flexible
sensor
platforms,
enhanced
sensitivity,
selectivity,
on-site
detection
capabilities.
Язык: Английский