2021 IEEE 18th India Council International Conference (INDICON),
Год журнала:
2023,
Номер
unknown, С. 1130 - 1135
Опубликована: Дек. 14, 2023
A
cascade
control
law
employing
non-linear
constraint
optimization
for
a
shell
and
tube
heat
exchanger
system
is
presented
in
this
paper.
Shell
exchangers
are
widely
used
various
industries
efficient
transfer
between
two
fluids.
The
of
such
systems
crucial
to
ensure
optimal
operation
maximize
energy
efficiency.
Hence,
the
main
aim
work
regulate
outlet
temperature.
structure
employs
an
inner
loop
with
PI
controller
flow
rate,
whereas
PID
employed
outer
maintain
desired
Further,
separate
govern
rate.
design
criteria
arc
attained
by
minimizing
error.
intended
specifications
imposing
constraints
on
bandwidth
loop-gain.
performance
analyzed
external
disturbances
parameter
uncertainties.
Besides,
Kharitonov-Hurwitz
theorem
determine
robust
stability.
findings
highlight
potential
proposed
technique
achieving
systems.
strategy
offers
practical
approach
improving
temperature
regulation
efficiency,
contributing
industrial
processes'
overall
sustainability.
International Journal of Numerical Modelling Electronic Networks Devices and Fields,
Год журнала:
2024,
Номер
37(2)
Опубликована: Март 1, 2024
Abstract
Controlling
coupled
tank
systems
is
challenging
due
to
interactions
between
tanks,
nonlinear
dynamics,
time
delays,
uncertainties,
and
cross‐coupling
effects.
The
design
of
effective
control
strategies
address
these
complexities
while
ensuring
stability
robust
performance
difficult.
Hence,
this
study
focuses
on
presenting
an
innovative
approach
enhance
level
in
by
employing
a
fractional‐order
proportional‐integral‐derivative
(FOPID)
controller.
FOPID
controller
designed
imposing
constraints
the
metric
closed‐loop
gain.
Besides,
defined
optimization
problem
solved
tree
seed
algorithm.
Further,
analyzed
graphically
using
singular
value
analysis.
inherent
are
effectively
addressed
designing
decouplers.
unique
characteristics
algorithm
navigate
complex
solution
spaces
its
handling
offer
framework.
validity
efficiency
proposed
method
range
simulation
experiments
conducted
distinct
interconnected
systems.
verified
graphically.
analysis
highlights
effectiveness
law
uncertainties
disturbances.
reduces
settling
around
.
Through
systematic
integration
comprehensive
analysis,
provides
holistic
for
optimizing
Transactions of the Institute of Measurement and Control,
Год журнала:
2024,
Номер
46(10), С. 1892 - 1909
Опубликована: Янв. 17, 2024
This
paper
presents
a
novel
approach
for
designing
decentralized
control
law
higher-order
systems
using
the
[Formula:
see
text]
complementary
sensitivity
function
(CSF)
framework.
Higher-order
often
exhibit
complex
dynamics
and
interactions
between
variables,
hence,
sophisticated
strategies
are
required
to
attain
desired
performance.
The
proposed
method
exploits
robustness
properties
of
CSF
achieve
effective
systems.
focuses
on
shaping
system
disturbances,
thereby
minimizing
impact
nature
allows
independent
each
subsystem,
reducing
complexity
associated
with
Furthermore,
controller
parameters
determined
graphically
by
enforcing
robust
criterion.
effectiveness
methodology
is
demonstrated
through
simulations
from
various
domains,
including
process
other
Comparative
evaluations
against
existing
methods
highlight
superiority
CSF-based
in
terms
International Journal of Modelling and Simulation,
Год журнала:
2024,
Номер
unknown, С. 1 - 14
Опубликована: Март 21, 2024
This
study
describes
the
design
and
implementation
of
an
algebraic
approach
for
a
dynamic
optimal
decoupling
controller
in
multi-variable
liquid-level
system.
method
aligns
with
model-matching
criteria
frequency-matching
technique.
The
prime
objective
proposed
is
to
create
closed-loop
feedback
system
using
PID
that
user-defined
linear
model
terms
both
dynamics
static
behavioral
response.
To
illustrate
robust
stability,
incorporates
multiplicative
input
output
uncertainty.
Simulation
results
verify
efficacy
decentralized
controller,
presenting
its
effectiveness
achieving
set-point
accuracy
disturbance
attenuation.
Furthermore,
employs
disk
margin
analysis
ascertain
safe
ranges
gain
phase
margin.
Chemical Engineering & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 5, 2025
Abstract
Controlling
multiple
input–multiple
output
(MIMO)
processes
is
challenging
due
to
loop
interactions.
This
study
explores
a
modified
fractional‐order
PID
(MFOPID)
controller
for
two‐input,
two‐output
mixing
tank
system.
MFOPID
design
involves
individual
controllers
based
on
the
Nelder–Mead
algorithm.
Relative
gain
array
analysis
optimizes
interactions,
complemented
by
simplified
decoupler.
Comparative
evaluation
against
Ziegler–Nichols,
internal
model
control,
and
standard
FOPID
demonstrates
superior
performance
of
offering
smoother
signals
demonstrating
significant
improvement
in
various
indices.
These
findings
underscore
efficacy
enhancing
control
MIMO
systems.
Asian Journal of Control,
Год журнала:
2023,
Номер
26(3), С. 1540 - 1552
Опубликована: Дек. 17, 2023
Abstract
This
paper
proposes
a
novel
graphical
approach
to
control
the
liquid
levels
of
different
variable
area
coupled
tank
systems
using
decentralized
controller.
The
are
common
benchmark
that
consist
two
tanks
interconnected
with
each
other.
primary
goal
is
maintain
level
in
at
desired
set
point
by
controlling
flow
rate.
attained
method
wherein
controller
values
obtained
from
plane.
Besides,
robust
criteria
enforced
guarantee
robustness.
proposed
design
aims
improve
performance
system
terms
disturbance
rejection
and
tracking.
structure
uses
distributed
strategy,
thereby
reducing
computational
load
which
leads
improving
performance.
loop
interactions
minimized
decouplers.
Furthermore,
first‐order
plus
dead‐time
(FOPDT)
models
derived
for
decoupled
subsystems.
servo
regulatory
responses
verified
input
output
disturbances.
Additionally,
response
uncertainties
parameter
variations
also
studied.
simulation
results
demonstrate
effectiveness
robustness
approach.
Transactions of the Institute of Measurement and Control,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 13, 2024
This
research
article
exploits
the
tree
seed
optimization
algorithm
to
optimize
parameters
of
fractional-order
proportional–integral–derivative
(FOPID)
controller.
The
study
focuses
on
designing
an
FOPID
controller
by
imposing
constraints
both
performance
metrics
and
closed-loop
amplitude
ratio
achieve
enhanced
control
system
performance.
is
inspired
growth
reproductive
behavior
trees
demonstrates
its
efficacy
in
finding
optimal
solutions
within
constrained
search
spaces.
process
involves
formulating
objective
function
subject
ratio,
reflecting
tracking
stability.
Besides,
inverted
decoupling
used
reduce
interaction
between
loops
enable
individual
tuning
each
loop
for
improved
smallest
disc
perturbation
employed
determine
system’s
proposed
approach
implemented
various
industrial
processes
demonstrate
effectiveness
achieving
desirable
efficiently
navigates
parameter
space,
thereby
converging
ideal
configurations
that
meet
specified
constraints.
Comparative
studies
with
other
methods
highlight
robustness
obtained
seed–based
