145 citations · 473 across the 9 of their papers we have counts for
11 papers
Parameter Estimation in Adaptive Control of Time-Varying Systems Under a Range of Excitation Conditions
Joseph E. Gaudio, Anuradha M. Annaswamy, Eugene Lavretsky +1
This paper presents a new parameter estimation algorithm for the adaptive control of a class of time-varying plants. The main feature of this algorithm is a matrix of time-varying…
Adaptive Flight Control in the Presence of Limits on Magnitude and Rate
Joseph E. Gaudio, Anuradha M. Annaswamy, Michael A. Bolender +1
Input constraints as well as parametric uncertainties must be accounted for in the design of safe control systems. This paper presents an adaptive controller for multiple-input-mul…
Connections Between Adaptive Control and Optimization in Machine Learning
Joseph E. Gaudio, Travis E. Gibson, Anuradha M. Annaswamy +2
This paper demonstrates many immediate connections between adaptive control and optimization methods commonly employed in machine learning. Starting from common output error formul…
Convergence Properties of Adaptive Systems and the Definition of Exponential Stability
Benjamin M. Jenkins, Anuradha M. Annaswamy, Eugene Lavretsky +1
The convergence properties of adaptive systems in terms of excitation conditions on the regressor vector are well known. With persistent excitation of the regressor vector in model…
Adaptive Output Feedback based on Closed-loop Reference Models
Travis E. Gibson, Zheng Qu, Anuradha M. Annaswamy +1
This note presents the design and analysis of an adaptive controller for a class of linear plants in the presence of output feedback. This controller makes use of a closed-loop ref…
Squaring-Up Method In the Presence of Transmission Zeros
Zheng Qu, Daniel Wiese, Anuradha M. Annaswamy +1
This paper presents a method to square up a generic MIMO system that already possesses transmission zeros. The proposed method is developed based on and therefore can be incorporat…
On Adaptive Control with Closed-loop Reference Models: Transients, Oscillations, and Peaking
Travis E. Gibson, Anuradha M. Annaswamy, Eugene Lavretsky
One of the main features of adaptive systems is an oscillatory convergence that exacerbates with the speed of adaptation. Recently it has been shown that Closed-loop Reference Mode…
Adaptive Control of Scalar Plants in the Presence of Unmodeled Dynamics
Heather S. Hussain, Megumi M. Matsutani, Anuradha M. Annaswamy +1
Robust adaptive control of scalar plants in the presence of unmodeled dynamics is established in this paper. It is shown that implementation of a projection algorithm with standard…
Closed-loop Reference Models for Output-Feedback Adaptive Systems
Travis E. Gibson, Anuradha M. Annaswamy, Eugene Lavretsky
Closed-loop reference models have recently been proposed for states accessible adaptive systems. They have been shown to have improved transient response over their open loop count…
Adaptive Systems with Closed-loop Reference Models: Stability, Robustness and Transient Performance
Travis E. Gibson, Anuradha M. Annaswamy, Eugene Lavretsky
This paper explores the properties of adaptive systems with closed-loop reference models. Using additional design freedom available in closed-loop reference models, we design new a…
Projection Operator in Adaptive Systems
Eugene Lavretsky, Travis E. Gibson
The projection algorithm is frequently used in adaptive control and this note presents a detailed analysis of its properties.