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Your search keyword '"Panagiotis Patrinos"' showing total 3 results
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3 results on '"Panagiotis Patrinos"'

1. Right ventricular lead sensing latency in pacemaker therapy

Author

Fani Zagkli, Nikoleta Kalovrenti, Panagiotis Patrinos, Panagiotis Chronopoulos, and John Chiladakis

Subjects
pacemaker, pacing system analyzer, right ventricular lead, sensing latency, Diseases of the circulatory (Cardiovascular) system, RC666-701
Abstract

Abstract Background Pacemaker implantation involves intraoperative testing of ventricular sensing using a device called a pacing system analyzer (PSA). The value obtained is expected to correspond to those taken by the pacemaker after its implantation. This study determined the latency period for sensing intracardiac electrogram (EGM) by the right ventricular (RV) lead. Methods Patients without significant heart disease and underlying intrinsic atrioventricular (AV) conduction underwent Medtronic or Abbott dual‐chamber pacemaker implantation with the RV lead positioned on the mid‐septum. Real‐time sensing data were obtained through PSA and after pacemaker implantation to evaluate latency as the time interval Q‐VS between the onset of QRS on surface electrocardiogram and the sensed EGM by the RV lead. Results Of 157 patients, 105 had narrow QRS (

Published
2022
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2. Microsecond nonlinear model predictive control for DC‐DC converters

Author

Panagiotis Patrinos, Nenad S. Jovicic, Ben Hermans, and Aleksandra Lekic

Subjects
Imagination, 0209 industrial biotechnology, Thesaurus (information retrieval), Computer science, Applied Mathematics, media_common.quotation_subject, 020208 electrical & electronic engineering, Control engineering, 02 engineering and technology, Converters, Optimal control, Computer Science Applications, Electronic, Optical and Magnetic Materials, Search engine, Microsecond, Model predictive control, 020901 industrial engineering & automation, Nonlinear model, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, media_common
Published
2020
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3. Real-time model predictive control based on dual gradient projection: Theory and fixed-point FPGA implementation

Author

Alberto Bemporad, Panagiotis Patrinos, Matteo Rubagotti, and Alberto Guiggiani

Subjects
0209 industrial biotechnology, Computer science, Mechanical Engineering, General Chemical Engineering, 020208 electrical & electronic engineering, Linear system, Biomedical Engineering, Aerospace Engineering, 02 engineering and technology, Fixed point, Solver, Optimal control, Industrial and Manufacturing Engineering, Model predictive control, 020901 industrial engineering & automation, Exponential stability, Control and Systems Engineering, Control theory, Bounded function, 0202 electrical engineering, electronic engineering, information engineering, Quadratic programming, Electrical and Electronic Engineering
Abstract

Summary This paper proposes a method to design robust model predictive control (MPC) laws for discrete-time linear systems with hard mixed constraints on states and inputs, in case of only an inexact solution of the associated quadratic program is available, because of real-time requirements. By using a recently proposed dual gradient-projection algorithm, it is proved that the discrepancy of the optimal control law as compared with the obtained one is bounded even if the solver is implemented in fixed-point arithmetic. By defining an alternative MPC problem with tightened constraints, a feasible solution is obtained for the original MPC problem, which guarantees recursive feasibility and asymptotic stability of the closed-loop system with respect to a set including the origin, also considering the presence of external disturbances. The proposed MPC law is implemented on a field-programmable gate array in order to show the practical applicability of the method. Copyright © 2016 John Wiley & Sons, Ltd.

Published
2016
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