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
Reliable LQG controller design via the sequential measurement update Tập 6 - Trang 4902-4907 vol.6 - 2002
Chien-Shu Hsieh, Der-Cherng Liaw, Chun-Hone Chen
This paper considers the problem of designing the reliable LQG controller of
discrete-time systems with sensor outages. A sequential gain computing algorithm
is formulated for LQG optimal control by using the conventional sequential
measurement update equations. With this new gain computing scheme, the reliable
control design problem in the case of sensor outages is reviewed and solved by
using a ... hiện toàn bộ
#Optimal control #Equations #Actuators #Control design #Regulators #Robust control #Stability #Electric variables measurement #Control engineering #Control systems
Thiết kế PID rời rạc bền vững với cả nhà máy và bộ điều khiển Dịch bởi AI Tập 5 - Trang 3529-3533 vol.5 - 2002
Hao Xu, A. Datta, S.P. Bhattacharyya
Trong bài báo này, chúng tôi trình bày một phương pháp thiết kế bộ điều khiển
PID số bền vững đối với các rối loạn trong nhà máy (bền vững với nhà máy) và bộ
điều khiển (bền vững với bộ điều khiển). Phương pháp này song song với cách tiếp
cận trước đó được phát triển cho trường hợp thời gian liên tục và tận dụng một
cách hợp lý phép biến đổi trực giao. Bộ điều khiển thu được duy trì tính ổn định
d... hiện toàn bộ
#Điều khiển ba biến #Tính ổn định #Phương pháp thiết kế #Hệ thống điều khiển #Đa thức #Hệ thống hồi tiếp kín #Điều khiển số #Điều khiển bền vững #Điều khiển công nghiệp #Tai
Approximated feedback linearization of nonlinear systems Tập 1 - Trang 582-587 vol.1
Yu Jin Jang, Sang Woo Kim
Obtaining a linearizing feedback and a coordinate transformation map is very
difficult, even though the system is feedback linearizable. It is known that
finding a desired transformation map and feedback is equivalent to finding an
integrating factor for an annihilating one-form for single input nonlinear
systems. It is also known that such an integrating factor can be approximated
using the simpl... hiện toàn bộ
#Linear approximation #Feedback #Nonlinear systems #Tensile stress #Linear systems #Control systems #Neurofeedback #Multi-layer neural network #Vectors #Gratings
Performance study of LQG, MCV, and risk-sensitive control methods for satellite structure control Tập 3 - Trang 2481-2486 vol.3 - 2002
Chang-Hee Won, K.T. Gunaratne
This paper will review the full-state-feedback LQG, minimal cost variance (MCV),
and risk-sensitive (RS) control for infinite time horizon case. In deriving the
solutions of LQG, MCV, and RS control, Hamilton-Jacobi-Bellman equations are
obtained using dynamic programming method. Unlike LQG and RS controllers, a pair
of coupled algebraic Riccati-type equations arises in the solutions of MCV
contro... hiện toàn bộ
#Satellites #Optimal control #Riccati equations #Cost function #Stochastic processes #Game theory #Three-term control #Covariance matrix #Dynamic programming #Control systems