intrusion monitoring in process control systems
Tài liệu Application of Computers in Process Control pptx
Ngày tải lên :
27/02/2014, 03:20
... most commonly used controller structures in industry. They do,
however, present some challenges to control and instrumentation engineers in the aspect of
tuning of the gains required for stability ... PID controller using LabVIEW.
2) Finding the values of K
P
and T
I
and T
D
using Ziegler Nichols Method for Tuning the PID
controller
Software required: LabVIEW
Background:
PID controllers ... 7
Changes in system’s closed loop response because of the changes in PID parameters with respect
to a step input can be best described using the following chart:
In LabVIEW there...
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Frontiers in Advanced Control Systems doc
Ngày tải lên :
16/03/2014, 23:20
... Modeling for Advanced Control Systems Design
6 Will-be-set-by -IN- TECH
the theory of Fuzzy Systems, associated to computer programs, are able to process numerical
data and/or linguistic information, ... especially from 70’s, has been
characterized by the growing need to improve the efficiency of industrial control systems in
the following aspects: increasing product quality, reduced losses, and other ... models.
The research on fuzzy inference systems has been developed in two main directions. The first
direction is the linguistic or qualitative information, in which the fuzzy inference system is
developed...
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process control systems application design and adjustment
Ngày tải lên :
01/04/2014, 11:09
... pointed out that t,his steady-state gain had
no influence whatsoever on the dynamic gain of the process. The
dynamic gain of the process can be considered identical to that of the
integrating process. ... gain.
If the controlled variable is
a11
integral of
jlflow,
such as pressure or level,
dimensional gain is included in the integrating time constant V/F. The
self-regulating liquid-level process ...
Ud
n
erstanding Feedback Control
constant dynamic gain, except for a process whose dominant element
is a pipeline.
Most
analyzers are not so far from being linear that they materially
affect the gain...
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Advances in Flight Control Systems Part 1 doc
Ngày tải lên :
19/06/2014, 23:20
... 2011
Printed in India
A free online edition of this book is available at www.intechopen.com
Additional hard copies can be obtained from orders@intechweb.org
Advances in Flight Control Systems, ... adaptive control in a model inversion fl ight control architecture. The
blending of both direct and indirect adaptive control is sometimes known as composite
adaptation. The indirect adaptive control ... XI
Preface
life applications, since monitoring of data is more meaningfull. Adaptive nonlinear dy-
namic inversion is selected as the preferred adaptive control method in this modular or
indirect approach....
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Advances in Flight Control Systems Part 2 doc
Ngày tải lên :
19/06/2014, 23:20
...
Stevens, 1992):
0
cos cos
sin cos
sin
V
XV
V
χ
γ
χ
γ
γ
⎡
⎤
⎢
⎥
=
⎢
⎥
⎢
⎥
−
⎣
⎦
(1)
()
()
()
1
1
cos cos sin
1
sin cos sin sin cos sin cos
cos
1
cos sin cos sin sin sin cos cos
DT g
m
XLYT
mV
g
LYT
mV ... the
tracking controllers. Singh (2003) uses a combination of sliding-mode control and adaptive
control.
In this chapter an integrated, though cascaded Lyapunov-based adaptive backstepping
(Krstić ... Marine Corps Base, Virginia in September of 2000. Fly-offs were also
conducted in several other locations including MacDill AFB, Florida, again, with the
LuMAV appearing as the only rotary-wing/VTOL...
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Advances in Flight Control Systems Part 3 pdf
Ngày tải lên :
19/06/2014, 23:20
... formation-flying control.
Appendix constraint adaptive backstepping
Backstepping [21] is a systematic, Lyapunov-based method for nonlinear control design,
which can be applied to nonlinear systems ... rate control
In the fourth step, an inner-loop feedback loop for the control of the body-axis angular rates
3
T
X
pq
r=
⎡⎤
⎣⎦
is constructed. The control inputs for the inner loop are the control- surface ... , the tracking errors are defined as
Advances in Flight Control Systems
38
Table 3. Manoeuvre 1 at flight condition 2: mean absolute value of tracking errors and
control inputs
...
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Advances in Flight Control Systems Part 4 potx
Ngày tải lên :
19/06/2014, 23:20
... tolerance of a flight control system is a major selling
point of adaptive control since traditional gain-scheduling control methods are viewed as
being less capable of handling off-nominal flight conditions ... adaptive control can improve the performance of a flight control system by
incorporating a model inversion indirect adaptation in conjunction with a direct adaptation.
The inner loop rate feedback control ... an indirect adaptive
law which updates the model inversion controller; and moreover
ˆ
G is ensured to be invertible
by verifying its matrix conditioning number.
56
Advances in Flight Control Systems
...
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Advances in Flight Control Systems Part 5 ppt
Ngày tải lên :
19/06/2014, 23:20
... research in advancing adaptive flight control will include flight testing of some
of the new promising adaptive control methods. Previously, NASA conducted flight testing
of the Intelligent Flight Control ... gain corresponding to individual
actuators. This matrix is then multiplied with the commanded change in control effector
settings as computed by the control allocator and actuators dynamics interactions. ... production systems in
the future.
4. Conclusions
This study presents a hybrid adaptive flight control method that blends both direct and
indirect adaptive control within a model inversion flight control...
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Advances in Flight Control Systems Part 6 pptx
Ngày tải lên :
19/06/2014, 23:20
...
routine. Also with the ever increasing processing power of computers over time this
constraint diminishes.
3.2 Optimizing routine using GA
Numerically the optimizing problem is given as “Find ... seconds. In the processing of the GA routine exception handling is carried
out to avoid breaking the GA optimisation process. For example if there is an individual (i.e.
gains in diagonal matrix) in ... Inverse
indirect adaptive control triple layer Adaptive
Nonlinear Dynamic Inversion
actuator monitoring Actuator Health Monitoring System
reference signal adaptation Pseudo Control Hedging
Table...
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Advances in Flight Control Systems Part 7 docx
Ngày tải lên :
19/06/2014, 23:20
... self-designing receding horizon optimal flight controller,
Proceedings of the American Control Conference, Seattle, Washington.
116
Advances in Flight Control Systems
Design of Intelligent Fault-Tolerant ... engine separation scenario
108
Advances in Flight Control Systems
(a) classical control (b) fault tolerant control
Fig. 22. Localizer capture task handling qualities ratings for classical control ... sideslipping flight.
Two additional interesting quantities to investigate are the throttle setting and the average
square innovation, which triggers the re-identification routine as explained in ref....
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Advances in Flight Control Systems Part 8 pptx
Ngày tải lên :
19/06/2014, 23:20
... φ sin θ sin ψ
+ cos φ cos ψ cos φ sin θ sin ψ −sin φ cos ψ
−sin θ sin φ cos θ cos φ cos θ
⎞
⎠
(1)
Forces F
R
b
x
, F
R
b
y
, F
R
b
z
acting on the aircraft are expressed in R
b
, they originate ... heading angle ψ. The transformation from R
b
to R
E
is given by a
transformation matrix T
bE
:
T
bE
=
⎛
⎝
cos θ cos ψ sin φ sin θ cos ψ
−cos φ sin ψ cos φ sin θ cos ψ + sin φ sin ψ
cos θ sin ψ sin ... are obtained by processing the differences between the
positions computed by the controller with the estimated positions. The fault detection and
isolation process consists in monitoring residuals...
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Advances in Flight Control Systems Part 9 pptx
Ngày tải lên :
19/06/2014, 23:20
... new operating point is
computed.
4. For this new operating point a linear state feedback controller is designed with an EA
strategy. This controller aims to maintain the aircraft handling qualities ... detection and isolation process
150
Advances in Flight Control Systems
Advances in Flight Control Systems
166
control allocation algorithm used in this chapter can be found in (Harkegard, 2002). ... achieved by implementing simultaneously the new operating point
and the fault-tolerant controller.
5.1 Operating point computation
The operating point exists if the healthy controls offer sufcient...
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Advances in Flight Control Systems Part 10 docx
Ngày tải lên :
19/06/2014, 23:20
... dynamic inversion control, results in not only an impractical controller with
large counterintuitive control signals (Hauser et al., 1992) (Reiner et al., 1996), but also in
undesired internal ... that the second
term in equation (45) will dominate the first in determining the zero positions. Thus al-
though the lift due to elevator deflection played no role in determining the system poles, ... reducing the complexity involved in solving the manoeuvre flight control
problem.
The chapter thus begins by presenting the fundamental ideas behind the design of gross
attitude independent specific...
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Advances in Flight Control Systems Part 11 pot
Ngày tải lên :
19/06/2014, 23:20
... operating
points, are chosen as
0 ≤ V
1
< ··· < V
r
≤ V
u
. (21)
The linearized model for V
= V
i
is a local LTI model representing the plant near the i-th
operating point. Linearly interpolating ... dynamics given by Eq. (13), K
in
is the inner-loop controller,
K
out
is the outer-loop controller and K
p
is a gain. The controlled variable from the initial
hovering phase to the low speed phase ... used for controller
design. Letting
¯
x
p
(V),
¯
u
p
(V) be respectively the state and the input in trim where the flight
202
Advances in Flight Control Systems
where v is a feedforward input for...
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Advances in Flight Control Systems Part 12 potx
Ngày tải lên :
19/06/2014, 23:20
... in Flight Control Systems
226
When the RC-helicopter is in moving, the radius of the marker in the image after moving is
defined as
2
D , the center coordinates of the marker after moving ... shown in Table 3. The ν-gap metric is one of criteria measuring the model error
in the frequency domain. It had been introduced in robust control theories associated with
the stability margin (Vinnicombe, ... using F
fix−1
209
Autonomous Flight Control System for Longitudinal Motion of a Helicopter
Advances in Flight Control Systems
224
P (x
c
,y
c
)
X
Y
x
max
x
min
y
min
y
max
y
max
-y
min
2
x
max
-x
min
2
...
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