Browsing by Subject "Control Systems, Adaptive"
Now showing items 120 of 27

Article

Conference Object
Accomodation of failures in the flight control system of the F16 aircraft using adaptive control
(Publ by American Automatic Control Council, 1990)The effect of surface and hardware failure on the flight control system of the F16 fighter aircraft is examined. In the absence of failures and unpredictable changes, the controller, which is based on gains scheduling, ...

Article
Adaptive Control of Linear TimeVarying Plants: A New Model Reference Controller Structure
(1989)In this paper we study the problem of developing a control law which can force the output of a linear timevarying plant to track the output of a stable linear timeinvariant reference model. We first show that the standard ...

Article
Adaptive control of time‐varying plants: Simple examples
(1988)The design and properties of an adaptive model reference scheme and an adaptive pole placement control scheme for linear time‐varying plants are demonstrated via two simple examples. The two new schemes combine new control ...

Conference Object
Convergence analysis for a class of neural networks
(Publ by IEEE, 1992)Summary form only given, as follows. The authors consider the convergence issue that arises in the application of backpropagation algorithms in a special class of neural network architectures, referred to as structured ...

Article
Decentralized indirect adaptive control of interconnected systems
(1991)Continuous time decentralized indirect adaptive controllers are proposed for a large‐scale system composed of N interconnected linear subsystems with unknown parameters. Each local adaptive law utilizes a normalizing signal ...

Conference Object
Decentralized indirect adaptive control of interconnected systems
(Publ by American Automatic Control Council, 1990)Continuoustime decentralized indirect adaptive controllers are proposed for a largescale system composed of N interconnected linear subsystems with unknown parameters. Each local adaptive law utilizes a normalizing signal ...

Article
Dominant richness and improvement of performance of robust adaptive control
(1989)Several recent robust adaptive control schemes guarantee stability and residual tracking errors which are "small" in the mean for any bounded initial conditions, independent of any persistence of excitation condition. Since ...

Conference Object
Instability analysis and robust adaptive control of robotic manipulators
(Publ by IEEE, 1988)The robustness of adaptive controllers with respect to uncertainty is examined. The uncertainties include bounded input disturbances, unknown and timevarying plant parameters, and unmodeled dynamics. A simple example shows ...

Conference Object
Model reference adaptive control for plants with unknown relative degree
(Publ by IEEE, 1989)One of the basic assumptions in stable model reference adaptive control is that the relative degree n* of the modeled part of the plant is known exactly and matches that of the reference model. The authors relax this ...

Conference Object
MRAC for multivariable plants with zero residual tracking error
(Publ by IEEE, 1989)In almost all modelreference adaptive control (MRAC) schemes proposed in the literature the tracking error cannot be guaranteed to go to zero in the presence of plant unmodeled dynamics and/or bounded disturbances. It is ...

Conference Object
New indirect adaptive control scheme for timevarying plants
(Publ by IEEE, 1988)An indirect adaptive control scheme for linear timevarying plants is presented which guarantees the closedloop stability and exact tracking of a class of reference input signals. By incorporating any a priori available ...

Article
A New Indirect Adaptive Control Scheme for TimeVarying Plants
(1990)An indirect robust adaptive controller designed for linear timeinvariant plants may also meet its control objective approximately for slowly timevarying plants. The plant parameter variations act as a disturbance in the ...

Conference Object
Parameter convergence of modified adaptive laws with persistent excitation
(Publ by American Automatic Control Council, 1990)The effect of σmodification on the parameter convergence and stability properties of two different adaptive laws is analyzed. It is shown that σmodification does not alter the ideal convergence properties of the adaptive ...

Conference Object
Persistency of excitation and overparameterization in model reference adaptive control
(Publ by IEEE, 1988)It is shown that if a modelreference adaptive controller is designed for an overparameterized plant, the persistence of excitation of the measured vector signal in the adaptive loop will be lost independently of the number ...

Article
Persistency of excitation and overparametrization in model reference adaptive control
(1990)In an overparametrized model reference adaptive control system, the measured signal (t) cannot be persistently exciting (PE) for any bounded reference input r(t). The controller parameter vector for modelplant transfer ...

Article
Reply to 'Comments on the robust stability analysis of adaptive controllers using normalizations' by P. P. Khargonekar and R. Ortega
(1990)The author addresses a statement in the abovetitled paper (ibid., vol. 34, no. 4, P. 478, Apr. 1989) that the proofs in four earlier papers, including two of which he is a coauthor, failed to establish that the proposed ...

Article
Robust adaptive control of bilinear plants
(1989)A robust model reference adaptive control scheme for bilinear plants with bounded disturbances is developed. Global stability of the closedloop adaptive system is guaranteed by using a switchinga modified adaptive law. ...

Article
Robust adaptive control of plants with unknown order and high frequency gain
(1991)An adaptive control scheme is presented which has a simple structure and guarantees global stability of the closedloop plant and asymptotic zero tracking error for a class of reference signals. The plants to be controlled ...

Article
Robust adaptive controla modified scheme
(1991)A normalizing signal that does not require the knowledge of the stability margin of the unmodelled dynamics is used in robust model reference adaptive control (MRAC) for plants with an enlarged class of unmodelled dynamics. ...