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Stability of slowly varying spatiotemporal systems
2008 Edition, December 1, 2008 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A characterization of stability for slowly varying spatiotemporal systems based on input-output description of the plant and controller is presented. This approach generalizes the results developed for the standard case for slowly time-varying...

Fast identification n-widths and uncertainty principles for LTI and slowly varying systems
1994 Edition, Volume 39, September 1, 1994 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The optimal worst-case uncertainty that can be achieved by identification depends on the observation time. In the first part of the paper, this dependence is evaluated for selected linear time invariant systems in the l/sup 1/ and H/sup /spl infin// norms...

Direct adaptive fuzzy control design achieving H/sup /spl infin// tracking for high performance servo drives
1999 Edition, Volume 14, December 1, 1999 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper proposes a direct adaptive fuzzy control technique to achieve H/sup /spl infin// tracking for high performance servo drives with external disturbances. The proposed methodology combines: the attenuation technique; fuzzy logic approximation method;...

Robust control of robot manipulators using hybrid H/sup /spl infin///adaptive controller
1994 Edition, Volume 2, January 1, 1994 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A robust hybrid control method for robot manipulators is proposed which integrates an H/sup /spl infin// controller and an adaptive controller. The H/sup /spl infin// controller is used to minimize the effect of parameter uncertainties of the robot...

Uncertainty, performance, and model dependency in approximate adaptive nonlinear control
2000 Edition, Volume 45, February 1, 2000 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We consider systems satisfying a matching condition that are functionally known up to weighted L/sup 2/ and L/sup /spl infin// measures of uncertainty. A modified LQ measure of control and state transient performance is given,...

Robust H/sup infinity / control design for systems with structured parameter uncertainty
1988 Edition, January 1, 1988 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In a recent paper a unification of the L/sub 2/ (LQG) and H/sup infinity / control design problems was obtained in terms of modified algebraic Riccati equations. In this study these results are extended to guarantee robust L/sub 2/ and...

Adaptive interference suppression using fuzzy-logic-based space-time filtering techniques in multipath DS-CDMA
2005 Edition, January 1, 2005 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

An adaptive robust linear minimum mean-squared error (MMSE) array-receiver based on the fuzzy-inference-based recursive least-squares (RLS) algorithm is developed for asynchronous DS-CDMA interference suppression in the presence of frequency selective multipath fading. This...

Intelligent tracking control for linear ultrasonic motor using H/sup /spl infin// control technique
2005 Edition, January 1, 2005 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Since the dynamic characteristics of linear ultrasonic motor (LUSM) are highly nonlinear and time varying and the model is difficult to obtain, it is difficult to design a suitable controller to achieve high-precision position control by using the...

Identification and control of slowly varying systems: Recent advances
1995 Edition, Volume 3, January 1, 1995 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Developments in identification and adaptive control of slowly time-varying systems are reviewed. The review is concentrated on the identification and control methodologies for slowly time-varying plants with unstructured...

Robust adaptive fuzzy sliding-mode control with H/sup /spl infin// tracking performance for a class of nonlinear systems
2004 Edition, Volume 1, January 1, 2004 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Since the computed torque or inverse dynamics control techniques are based on a good understanding of the controlled system dynamics and even its environment; the objection for the real-time application is unrealizable for the unknown systems. To...

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