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Robust Adaptive Controller with Zero Residual Tracking Errors
(1986)
The adaptive control of a plant whose dominant part has transfer function with relative degree n* = 1 has been considered in the presence of parasifics and disturbances. A new adaptive law is proposed which guarantees the ...
Adaptive stabilization of not necessarily minimum phase plants
(1986)
We show that a first-order adaptive regulator can stabilize any linear time-invariant plant (LTI) whose transfer function has arbitrary relative degree and order, and is not necessarily minimum phase, provided the dominant ...
Robust adaptive control: A unified approach
(Publ by IEEE, 1989)
The theory and design of adaptive control is viewed by many researchers as a collection of tricks and analytical tools which are difficult to understand. To demonstrate that this is not the case, a general procedure for ...
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 ...
ROBUST DISCRETE-TIME ADAPTIVE CONTROLLER.
(IEEE, 1986)
The authors propose a discrete-time model-reference adaptive control algorithm which is robust with respect to stable additive and multiplicative plant uncertainties. The algorithm uses the same controller structure as the ...
Class of unmodeled dynamics in robust adaptive control.
(Publ by American Automatic Control Council, 1988)
The authors use time-domain and frequency-domain bounds to characterize the class of allowable unmodeled dynamics in robust adaptive control. This class is a general one and includes time delays, distributed systems, etc. ...
FREQUENCY DOMAIN CONDITIONS FOR STRICTLY POSITIVE REAL FUNCTIONS.
(1987)
Frequency-domain conditions for strictly positive real (SPR) functions which appear in literature are often only necessary or only sufficient. This point is raised by B. D. O. Anderson and S. Vongpanitlerd (1973), and J. ...
A Robust Direct Adaptive Controller
(1986)
This paper proposes a new direct adaptive control algorithm which is robust with respect to additive and multiplicative plant unmodeled dynamics. The algorithm is designed based on the reduced-order plant, which is assumed ...
ROBUST DISCRETE-TIME ADAPTIVE CONTROL.
(Plenum Press, 1986)
This paper proposes a discrete-time model reference adaptive control algorithm which is robust with respect to additive plant uncertainties. The algorithm employs an adaptive law for adjusting the controller parameters. ...
Instability analysis and improvement of robustness of adaptive control
(1984)
The effects of unmodeled high frequency dynamics and bounded disturbances on stability and performance of adaptive control schemes are analyzed. Five possible types of instability mechanisms-parameter drift, 'linear' ...