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
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
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
Computationally efficient scheduled model predictive control for constrained nonlinear systems with stability guarantees Tập 6 - Trang 4487-4492 vol.6 - 2002
Zhaoyang Wan, M.V. Kothare
We present a computationally efficient scheduled formulation of model predictive
control (MPC) for constrained nonlinear systems with large operating regions. We
design a set of local predictive controllers with their explicit regions of
stability covering the desired operating region, and implement them as a single
scheduled MPC which switches between the set of local controllers and achieves
non... hiện toàn bộ
#Processor scheduling #Computational modeling #Predictive models #Predictive control #Nonlinear systems #Robust stability #Nonlinear control systems #Control systems #Switches #Robust control
Multi-agent products and trajectory specifications in supervisory control theory Tập 1 - Trang 722-723 vol.1
I. Romanovski, P.E. Caines
The formulation and specification of structures for interacting controlled
finite deterministic automata are developed within the multi-agent (MA) product
framework. Next, supervisory control problems for an MA product system are
considered and necessary and sufficient conditions for the synthesis of MA
supervisors are given.
#Supervisory control #Automatic control #Automata #Control systems #Control system synthesis #Force control #Network synthesis #Manufacturing #Telecommunications #Transportation
Delay predictive models of the National Airspace System using hybrid control theory Tập 1 - Trang 767-772 vol.1
A.M. Bayen, P. Grieder, H. Sipma, G. Meyer, C.J. Tomlin
We present a model for analyzing and simulating the propagation of delays
through several sectors of the Oakland Air Route Traffic Control Center.
Aircraft are represented as points moving along straight lines with constant
velocity, and the air traffic controller is modelled as an action which can
provide instantaneous heading and velocity changes to each aircraft. If the
controller action is res... hiện toàn bộ
#Predictive models #Control theory #Aircraft #Air traffic control #Aerospace control #Traffic control #Propagation delay #Velocity control #Computational modeling #Analytical models
On the under-determined partial differential equation in the nonlinear filtering problems Tập 2 - Trang 907-908 vol.2 - 2002
Xi Wu, S.S.-T. Yau
The Lie algebraic method provides an important research direction for nonlinear
filtering theory. By interpreting the Duncan-Mortensen-Zakai equation or its
robust form as a partial differential equation with time varying parameters, one
derives an approach to filtering that is based on Lie algebra as well as the
theory of linear differential operators. The search and construction of the
finite di... hiện toàn bộ
#Partial differential equations #Algebra #Filtering theory #Nonlinear filters #Differential algebraic equations #Nonlinear equations #Robustness #Estimation theory #Polynomials