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
Điều khiển phi tuyến thông qua theo dõi quỹ đạo tối ưu hóa Dịch bởi AI Tập 5 - Trang 3980-3985 vol.5 - 2002
E. Nagy
Bài báo này trình bày các phương pháp mới cho thiết kế hệ thống điều khiển theo thời gian rời rạc phi tuyến. Các phương pháp này dựa trên tối ưu hóa và sử dụng hoặc là phương pháp tuyến tính hóa gần đúng hoặc là các phương trình phi tuyến gốc để đạt được giải pháp một cách đồng bộ. Vấn đề tối ưu hóa điều khiển với chân trời hữu hạn được giải quyết qua chuỗi tối ưu hóa hai giai đoạn và lặp. Điều kh...... hiện toàn bộ
#Quỹ đạo
Stability testing for systems with polynomial uncertainty Tập 5 - Trang 3896-3901 vol.5 - 2002
M.S. Fadali
We develop a new stability tests for systems with one uncertain parameter and with polynomial uncertainty structure. The test is derived using the resultant determinant for the real and imaginary parts of the polynomial evaluated on the imaginary axis. The resultant determinant is a function of the uncertain parameter as well as frequency. We evaluate the determinant using a known algorithm then t...... hiện toàn bộ
#System testing #Polynomials #Uncertainty #Frequency #Robust stability #Grid computing
Nonlinear predictive control based on a global model identified off-line Tập 5 - Trang 4197-4202 vol.5 - 2002
H. Peng, T. Ozaki, Y. Toyoda, V. Haggan-Ozaki
A model predictive control (MPC) strategy for the non-stationary nonlinear systems with operating point-dependent dynamics is presented. The MPC proposed does not require on-line parameters estimation, because its internal model is an off-line identified global (RBF-ARX.) model, which is a generalized ARX model with Gaussian radial basis function networks-based functional coefficients. The RBF-ARX...... hiện toàn bộ
#Predictive control #Predictive models #Parameter estimation #Quadratic programming #Nonlinear systems #Neural networks #Nonlinear dynamical systems #Mathematics #Sampling methods #Time varying systems
Adaptive rejection of quasi-periodic tension disturbances in the unwinding of a non-circular roll Tập 5 - Trang 4009-4014 vol.5 - 2002
Yulin Xu, M. de Mathelin, D. Knittel
In this paper, an adaptive algorithm is designed to compensate roll noncircularity perturbations in web transport systems. The noncircularity of a roll creates tension disturbances whose frequencies are slowly varying due to the change of radius of the roll. The magnitude and phase of these disturbances are estimated through an adaptive algorithm that cancels their effect. Simulations and experime...... hiện toàn bộ
#Adaptive algorithm #Frequency #Control systems #Algorithm design and analysis #Traction motors #Velocity control #Robust control #Electrical equipment industry #Industrial control #Optimal control
Development of thin panels for active control of acoustic reflection, absorption and transmission Tập 2 - Trang 909-914 vol.2 - 2002
H. Zhu, R. Rajamani, K.A. Stelson
This paper explores the development of thin panels that can be controlled to provide surfaces with desired reflection coefficients, for use as perfect reflectors or absorbers, or transmission blockers. The development of the control system is based on the use of wave separation algorithms that separate incident sound from reflected sound. The reflected sound is then controlled to desired levels. T...... hiện toàn bộ
#Acoustic reflection #Absorption #Control systems #Acoustic noise #Surface acoustic waves #Loudspeakers #Actuators #Machinery #Glass #Windows
A robust internal model controller for nonlinear systems Tập 1 - Trang 561-566 vol.1
S. Zazueta, J. Alvarez
A redesign of a control algorithm for nonlinear systems having the structure called internal model controller is proposed. This new controller, based on a Lyapunov stability technique, displays a better robust performance than the classical IMC structure. The controller is continuous, so it does not present chattering. Furthermore, a saturated, high gain observer is included to overcome the proble...... hiện toàn bộ
#Robust control #Control system synthesis #Nonlinear control systems #Nonlinear systems #Robust stability #Uncertain systems #Telescopes #Control systems #Filters #Astronomy