14 papers
Partial-State Deadzone-Adapted Disturbance Suppression Control For Strict-Feedback Systems
Iasson Karafyllis, Alexandros Aslanidis, Miroslav Krstic
In this paper we provide an extension of the partial-state Deadzone-Adapted Disturbance Suppression (DADS) adaptive control scheme in the case of strict-feedback systems. We study…
On the Existence of Almost Periodic Solutions with Applications to Global Entrainment
Iasson Karafyllis, Miroslav Krstic
This paper provides two results that are useful in the study of the existence and the stability properties of almost periodic solutions for a given dynamical system. The obtained r…
Lotka-Sharpe Neural Operators for Control of Population PDEs
Miroslav Krstic, Iasson Karafyllis, Luke Bhan +1
Age-structured predator-prey integro-partial differential equations provide models of interacting populations in ecology, epidemiology, and biotechnology. A key challenge in feedba…
Global Stability Analysis of the Age-Structured Chemostat With Substrate Dynamics
Iasson Karafyllis, Dionysios Theodosis, Miroslav Krstic
In this paper we study the stability properties of the equilibrium point for an age-structured chemostat model with renewal boundary condition and coupled substrate dynamics under…
On the Existence of Periodic Solutions with Applications to Extremum-Seeking
Iasson Karafyllis, Miroslav Krstic
This paper provides two results that are useful in the study of the existence and the stability properties of a periodic solution for a given dynamical system. The first result dea…
The Age-Structured Chemostat with Substrate Dynamics as a Control System
Iasson Karafyllis, Dionysis Theodosis, Miroslav Krstic
In this work we study an age-structured chemostat model with a renewal boundary condition and a coupled substrate equation. The model is nonlinear and consists of a hyperbolic part…
DADS Under Unknown Input Coefficients
Iasson Karafyllis, Miroslav Krstic
This short note shows that the Deadzone-Adapted Disturbance Suppression (DADS) adaptive control scheme is applicable to systems with unknown input coefficients. We study time-invar…
Partial-State DADS Control for Matched Unmodeled Dynamics
Iasson Karafyllis, Miroslav Krstic
We extend the Deadzone-Adapted Disturbance Suppression (DADS) control to time-invariant systems with dynamic uncertainties that satisfy the matching condition and for which no boun…
Global Stabilization of Chemostats with Nonzero Mortality and Substrate Dynamics
Iasson Karafyllis, Epiphane Loko, Miroslav Krstic +1
In "chemostat"-type population models that incorporate substrate (nutrient) dynamics, the dependence of the birth (or growth) rate on the substrate concentration introduces nonline…
Global Stability Notions to Enhance the Rigor and Robustness of Adaptive Control
Iasson Karafyllis, Miroslav Krstic
Stability theory plays a crucial role in feedback control. However, adaptive control theory requires advanced and specialized stability notions that are not frequently used in stan…
A Complete Inverse Optimality Study for a Tank-Liquid System
Iasson Karafyllis, Filippos Vokos, Miroslav Krstic
This paper presents a complete inverse optimality study for a linearized tank-liquid system where the liquid is described by the viscous Saint-Venant model with surface tension and…
From Road Congestion to Vehicle-Control Enabled Artificial Traffic Fluids
Iasson Karafyllis, Dionysios Theodosis, Markos Papageorgiou +1
This article provides an overview of the design of nonlinear feedback Cruise Controllers (CCs) for automated vehicles on lane-free roads. The feedback design problem is particularl…
Deadzone-Adapted Disturbance Suppression Control for Strict-Feedback Systems
Iasson Karafyllis, Miroslav Krstic, Alexandros Aslanidis
In this paper we extend our recently proposed Deadzone-Adapted Disturbance Suppression (DADS) Control approach from systems with matched uncertainties to general systems in paramet…
Deadzone-Adapted Disturbance Suppression Control for Global Practical IOS and Zero Asymptotic Gain to Matched Uncertainties
Iasson Karafyllis, Miroslav Krstic
In this paper we study a special class of systems: time-invariant control systems that satisfy the matching condition for which no bounds for the disturbance and the unknown parame…