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
Estimation via Markov chain Monte Carlo Tập 4 - Trang 2559-2564 vol.4 - 2002
J.C. Spall
Markov chain Monte Carlo (MCMC) is a powerful means for generating random samples that can be used in computing statistical estimates, numerical integrals, and marginal and joint probabilities. The approach is especially useful in applications where one is forming an estimate based on a multivariate probability distribution or density function that would be hopeless to obtain analytically. In part...... hiện toàn bộ
#Monte Carlo methods #Sampling methods #Bayesian methods #Power generation #Books #Physics computing #Probability distribution #Density functional theory #System identification #State estimation
Probabilistic controller analysis and synthesis for quadratic performance: the method of HPD inscription Tập 5 - Trang 4244-4249 vol.5 - 2002
H. Fukuzawa, P.T. Kabamba
Probabilistic control of LTI plants for quadratic performance is considered. Here the plant is subject to parametric uncertainty such that the uncertain plant parameters are jointly Gaussian. The method proposed here $the Highest Posterior Density (HPD) inscription method - is based on the fact that stability and quadratic performance impose linear constraints on the eigenvalues of the solution of...... hiện toàn bộ
#Performance analysis #Eigenvalues and eigenfunctions #Equations #Robust control #Robust stability #Uncertainty #State feedback #Computational complexity #NASA #Design optimization
Pre-planning in distributed manufacturing systems: a sample path approach Tập 6 - Trang 4463-4468 vol.6 - 2002
C. Thierer, U. Kiencke
A discrete, event-driven model that allows for pre-planning of orders in a manufacturing system is presented. Being part of a more comprehensive, distributed framework, one autonomous entity and its needs are addressed. Those requirements are cost-effective when coping with delays of orders, e.g. due to resource failure, and when dynamically adding newly acquired orders to an existing schedule, in...... hiện toàn bộ
#Manufacturing systems #Job shop scheduling #Costs #Dynamic scheduling #Delay effects #Manufacturing industries #Information technology #Employment #Production systems #Resource management
Stability analysis for multi-class multi-queue single server system under polling table Tập 6 - Trang 4732-4737 vol.6 - 2002
Zhi Wang, Yeqiong Song, Hai-bin Yu, Youxian Sun
We first propose and research a multi-class multi-queue system single server under polling table, which is more proper for modeling token-based communication systems. Then we deduce its common stability condition through analyzing the procedure of message service and message queue in this system. Further, we obtain stability conditions with services, such as limited and gated service, from the com...... hiện toàn bộ
#Stability analysis #Queueing analysis #Application software #Industrial control #Automation #Message service #Concrete #Time sharing computer systems #FDDI
An efficient integration algorithm for a class of discontinuous dynamical systems in sliding motion Tập 1 - Trang 698-703 vol.1
J. Agrawal, K.M. Moudgalya, A.K. Pani
An ideal gas-liquid discontinuous dynamical system at sliding motion is studied. The discontinuity sticks while described by the gas model, and hence, integrated over a fixed time step. A discontinuity algorithm detects the exact time duration of applicability of the liquid model. The ratio of time of applicability of the liquid model to that of the gas model is a smooth graph and it is in agreeme...... hiện toàn bộ
#Motion analysis #Inductors #Mathematical model #Mathematics #Chemical technology #Gas industry #Plastics industry #Mathematical analysis #Polymers #Differential algebraic equations
Speed control of a diesel engine: a nonlinear approach Tập 4 - Trang 3293-3294 vol.4 - 2002
R. Outbib, X. Dovifaaz, A. Rachid, M. Ouladsine
This paper proposes a strategy to control the speed of diesel engine. More precisely, we show how to control the speed of the diesel engine using the fuel rate as the control law. We first present a mathematical model which describes the behaviour of the engine, then we propose a new nonlinear method to design a controller for a class of nonlinear systems. Afterwards, the proposed method is used t...... hiện toàn bộ
#Velocity control #Diesel engines #Fuels #Manifolds #Combustion #Pollution #Engine cylinders #Nonlinear systems #Control systems #Equations