Optimal control of HIV infection with a continuously-mutating viral population Tập 5 - Trang 4033-4038 vol.5 - 2002
J.J. Kutch, P. Gurfil
There has been much discussion in recent years devoted to determining the
optimal methodology for administering anti-viral medication therapies to fight
HIV infection. There are many reasons to seek such an optimal therapy, including
the minimization of drug toxicity and monetary cost. However, there is
increasing recognition that exposure to many anti-HIV medications produces
extremely rapid chan... hiện toàn bộ
#Optimal control #Human immunodeficiency virus #Drugs #Medical treatment #Genetic mutations #Capacitive sensors #Viruses (medical) #Immune system #Medical control systems #DNA
Transition control using multiple adaptive models and an H-infinity controller design Tập 4 - Trang 2621-2626 vol.4 - 2002
Z. Tian, K.A. Hoo
By transition control, it is meant a type of control method that is employed
when the plant transitions from one operating state to another as a result of a
set point change. This work proposes and develops an intelligent adaptive
multiple model approach that simultaneously adapts the model and an H/sub /spl
infin// controller parameters. The method is demonstrated on a non-linear
chemical reactor... hiện toàn bộ
#Programmable control #Adaptive control #H infinity control #Open loop systems #Estimation error #Chemical reactors #Chemical engineering #Chemical products #Globalization #Polymers
Development of a closed-loop testing method for a next-generation terminal area automation system Tập 2 - Trang 1325-1330 vol.2 - 2002
J.E. Robinson, D.R. Isaacson
A next-generation air traffic decision support tool, known as the active final
approach spacing tool (aFAST), will generate heading, speed and altitude
commands to achieve more precise separation of aircraft in the terminal area.
The techniques used to analyze the performance of earlier generation decision
support tools are not adequate to analyze the performance of aFAST. The paper
summarizes the... hiện toàn bộ
#Automatic testing #System testing #Automation #Aircraft #Performance analysis #Air traffic control #Feedback loop #Aerospace control #Scheduling algorithm #Trajectory
Disturbance rejection for nonlinear systems Tập 5 - Trang 3484-3489 vol.5 - 2002
Zongxuan Sun, Tsu-Chin Tsao
Tracking or rejection of unknown exogenous signals with known generating
dynamics is of major concern in feedback control design. Linear feedback control
based on the internal model principle achieves asymptotic performance for linear
systems with linear exogenous signal dynamics. This paper presents a control
design based on the internal model principle to track or reject nonlinear
exogenous sign... hiện toàn bộ
#Nonlinear systems #Aerodynamics #Linear systems #Feedback control #Sufficient conditions #Control design #Regulators #Nonlinear equations #Partial differential equations #Servomechanisms
Direct RBF neural network control of a class of discrete-time non-affine nonlinear systems Tập 1 - Trang 424-429 vol.1
J. Zhang, S.S. Ge, T.H. Lee
Direct adaptive RBF NN control is presented for a class of discrete-time
single-input single-output non-affine nonlinear systems. An implicit function
theorem is used to prove the existence and uniqueness of the implicit desired
feedback control. Based on the input-output model, RBF neural networks are used
to emulate the implicit desired feedback control. The closed-loop is proven to
be semi-glob... hiện toàn bộ
#Neural networks #Nonlinear control systems #Control systems #Nonlinear systems #Feedback control #Adaptive control #Neurons #Programmable control #Computer networks #Physics computing
H/sub /spl infin// controller design for discrete-time fuzzy systems using fuzzy weighting-dependent Lyapunov functions Tập 4 - Trang 3252-3257 vol.4 - 2002
Doo Jin Choi, PooGyeon Park
For discrete-time Takagi-Sugeno (TS) fuzzy systems, we propose an H/sub /spl
infin// state-feedback fuzzy controller associated with a fuzzy
weighting-dependent Lyapunov function. In terms of parameterized linear matrix
inequalities (PLMIs), the controller employs not only the current-time but also
one-step-past information on the time-varying fuzzy weighting functions.
Appropriately selecting the... hiện toàn bộ
#Fuzzy systems #Control systems #Fuzzy control #Lyapunov method #Electric variables control #Takagi-Sugeno model #Control system synthesis #Cost function #Stability #Attenuation
Combustion optimization with inferential sensing Tập 5 - Trang 3890-3895 vol.5 - 2002
V. Havlena, J. Findejs, D. Pachner
The paper presents development and implementation of an advanced combustion
controller (ACC) for a coal-fired boiler. The solution consists of combustion
controller (multi-variable predictive controller) and combustion optimizer
(cautious strategy stochastic optimizer). Optimization is based on a model of
the CO and NO/sub x/ emissions. The model is used to calculate the setpoint of
the optimal ai... hiện toàn bộ
#Combustion #Fuels #Boilers #Optimal control #Flue gases #Stochastic processes #Predictive models #Recursive estimation #Laboratories #Predictive control
A Lyapunov function proof of Poincare's theorem Tập 5 - Trang 3922-3925 vol.5 - 2002
W.M. Haddad, S.G. Nersesov, V.S. Chellaboina
One of the most fundamental results in analyzing the stability properties of
periodic orbits and limit cycles of dynamical systems is Poincare's theorem. The
proof of this result involves system analytic arguments along with the
Hartman-Grobman theorem. In this paper, using the notions of stability of sets,
we construct lower semicontinuous Lyapunov functions to provide a Lyapunov
function proof o... hiện toàn bộ
#Orbits #Trajectory #Aerospace engineering #Stability analysis #Limit-cycles #Lyapunov method #Sufficient conditions #Mechanical factors
Prediction uncertainty from models and data Tập 5 - Trang 4135-4140 vol.5 - 2002
M. Frenklach, A. Packard, P. Seiler
We present an approach to uncertainty propagation in dynamic systems, exploiting
information provided by related experimental results along with their models.
Our computational procedure draws from ideas and tools that are now common in
robust control theory. A case study on a well-known database of methane
combustion experiments and models demonstrates the viability of our proposed
method.
#Uncertainty #Predictive models #Robust control #Chemicals #Equations #Mechanical engineering #Databases #Combustion #Numerical simulation #Data processing
Experimental results in vision-based lane keeping for highway vehicles Tập 2 - Trang 869-874 vol.2 - 2002
V. Cerone, A. Chinu, D. Regruto
In this paper we address the problem of lateral control of vehicles for highway
lane keeping using vision system. First we present a suitable simplified model
of the plant and show its agreement with typical highway experimental
conditions. Then, we formulate the control problem and propose a SISO control
strategy based on driver behaviour emulation. The controller design is carried
out using clas... hiện toàn bộ
#Road transportation #Road vehicles #Automatic control #Automated highways #Control systems #Magnetic analysis #Robust control #Emulation #Uncertainty #System testing