Search

Your search keyword '"Visioli, Antonio"' showing total 130 results
Start Over Author "Visioli, Antonio" Publication Year Range Last 3 years
130 results on '"Visioli, Antonio"'

1. A Branch and Bound method for the exact parameter identification of the PK/PD model for anesthetic drugs

Author

Di Credico, Giulia, Consolini, Luca, Laurini, Mattia, Locatelli, Marco, Milanesi, Marco, Schiavo, Michele, and Visioli, Antonio

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

We address the problem of parameter identification for the standard pharmacokinetic/pharmacodynamic (PK/PD) model for anesthetic drugs. Our main contribution is the development of a global optimization method that guarantees finding the parameters that minimize the one-step ahead prediction error. The method is based on a branch-and-bound algorithm, that can be applied to solve a more general class of nonlinear regression problems. We present some simulation results, based on a dataset of twelve patients. In these simulations, we are always able to identify the exact parameters, despite the non-convexity of the overall identification problem.

Published
2024

3. Event-triggered Control of Port-Hamiltonian Systems under Time-delay Communication

Author

Aranda-Escolástico, Ernesto, Colombo, Leonardo J., Guinaldo, María, and Visioli, Antonio

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

We study the problem of periodic event-triggered control of interconnected port-Hamiltonian systems subject to time-varying delays in their communication. In particular, we design a threshold parameter for the event-triggering condition, a sampling period, and a maximum allowable delay such that interconnected port-Hamiltonian control systems with periodic event-triggering mechanism under a time-delayed communication are able to achieve asymptotically stable behaviour. Simulation results are presented to validate the theory.

Published
2022

26. Characterization of limit cycles for self-regulating and integral processes with PI control and send-on-delta sampling

Author

Chacón Sombría, Jesús, Sánchez, José, Visioli, Antonio, Yebraj, Luis J., Dormido, Sebastián, Chacón Sombría, Jesús, Sánchez, José, Visioli, Antonio, Yebraj, Luis J., and Dormido, Sebastián

Abstract

El texto completo de este trabajo no se encuentra disponible por no haber sido facilitado aún por su autor, por restricciones de copyright, o por no existir una versión digital, This work is focused on the study of limit cycles that appear in a control scheme which is based on the use of a PI controller with an event-based send-on-delta sampling (SOD). The processes investigated are integrator processes plus time delay (IPTD) and first and second order processes plus time delay, which are of interest because they are frequently used to model many industrial processes. The SOD sampling is characterized as a non-linearity of n levels with hysteresis. An algorithm to calculate the limit cycles properties is proposed, and then the results obtained in simulations are compared with experiments performed on a real plant, a distributed solar collector field at the Solar Platform of Almeria (PSA, Spain). (C) 2013 Elsevier Ltd. All rights reserved., Depto. de Arquitectura de Computadores y Automática, Fac. de Ciencias Físicas, TRUE, pub

Published
2024

27. Open and low-cost virtual and remote labs on control engineering

Author

Sáenz, Jacobo, Chacón Sombría, Jesús, Torre, Luis de la, Visioli, Antonio, Dormido, Sebastián, Sáenz, Jacobo, Chacón Sombría, Jesús, Torre, Luis de la, Visioli, Antonio, and Dormido, Sebastián

Abstract

This paper presents an open course in the University Network of Interactive Laboratories, which offers several virtual and remote laboratories on automatic control, accessible to anyone. All the details on one of these labs (a two electric coupled drives system that allows performing control practices in a 2 x 2 MIMO system with industrial applications) and the activities that can be performed with it are given. We use a low-cost solution for developing the virtual and remote labs shared in this open course, based on the use of a free authoring tool Easy Java/Javascript Simulations (EJsS) for building the laboratories' user interfaces and a cheap development platform board (BeagleBone Black). The virtual and remote labs are deployed into a free Learning Management System (Moodle) Web environment that facilitates their management and maintenance., Spanish Government, Depto. de Arquitectura de Computadores y Automática, Fac. de Ciencias Físicas, TRUE, pub

Published
2024

28. Design of an event-based feedforward strategy for SOPTD processes

Author

Chacón Sombría, Jesús, Sánchez, José, Dormido, Sebastián, Visioli, Antonio, Chacón Sombría, Jesús, Sánchez, José, Dormido, Sebastián, and Visioli, Antonio

Abstract

An event-based method to perform the set-point following task for second order processes with time delay (SOPTD) is investigated in this work. The aim of the research is to extend an event-based controller that has been tested previously in processes responding to the first-order with time delay (FOPTD) model. The controller is based on feedforward and feedback actions to do the two main tasks of a controller, set-point following and disturbances rejection, with an event triggered paradigm. This work is mainly focused on the feedforward part of the controller, with the goal of establishing a method to calculate the control signal and the conditions that must be satisfied to update it., Depto. de Arquitectura de Computadores y Automática, Fac. de Ciencias Físicas, TRUE, pub

Published
2024

42. A relay-feedback automatic tuning methodology of PIDA controllers for high-order processes.

Author

Visioli, Antonio and Sánchez-Moreno, José

Subjects
*CLOSED loop systems, *INTERNAL auditing
Abstract

In this paper, we present a new automatic tuning methodology for proportional-integral-derivative-acceleration controllers. In particular, a (possibly high-order) model of the process is obtained by means of a relay-feedback test. Then, the four parameters of the controller are determined by approximating the general feedback internal model controller with a truncated Maclaurin series. In this context, the user can select a parameter that determines the speed of the response of the closed-loop system and implicitly handles the trade-off between aggressiveness and robustness. It is shown that the additional acceleration action allows an improvement of the performance with respect to a traditional proportional-integral-derivative controller and represents an effective solution for the control of high-order systems. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

43. Performance comparison between PID, PIDD2and PIDD2α

Author

Milanesi, Marco, Visioli, Antonio, and Chen, YangQuan

Abstract

We evaluate the performance achievable with Proportional-Integral-Derivative fractional Double-Derivative controllers, denoted as PIDD2α, by comparing it with that achievable with standard PID controllers and with Proportional-Integral-Double-Derivative (PIDD or PIDD2) controllers, which are also called Proportional-Integral-Derivative-Acceleration (PIDA) controllers. The cost-effectiveness ratio improvement obtained when augmenting the control law with an element proportional to the fractional second derivative of the control error is assessed by considering different process transfer functions and by tuning the controllers minimizing the integrated absolute error with genetic algorithms. Further, a constraint on the maximum sensitivity is also posed so that the system robustness is taken into account. The set-point following and the load disturbance rejection tasks are evaluated separately.

Published
2024
Full Text
View/download PDF

46. A comparison between PID and PIDA controllers

Author

Milanesi, Marco, Mirandola, Edoardo, and Visioli, Antonio

Subjects
PIDA controllers, Tuning, Genetic algorithms, PID controllers, PIDA controllers, Genetic algorithms, Tuning
Published
2022

49. A control‐based observer approach for estimating energy intake during pregnancy.

Author

Ranghetti, Luca, Rivera, Daniel E., Guo, Penghong, Visioli, Antonio, Savage Williams, Jennifer, and Symons Downs, Danielle

Subjects
WEIGHT gain, FETUS, PREGNANCY, INTERNAL auditing, PHYSICAL activity, PREDICTION models
Abstract

Gestational weight gain outside of Institute of Medicine guidelines poses a risk to both the mother and her unborn child. Behavioral interventions such as Healthy Mom Zone (HMZ) that aim to regulate gestational weight gain require self‐monitoring of energy intake, which is often significantly under‐reported by participants. This article describes the use of a control systems approach for energy intake estimation during pregnancy. It relies on an energy balance model that predicts gestational weight based on physical activity and energy intake, the latter treated as an unmeasured disturbance. Two control‐based observer formulations relying on Internal Model Control and Model Predictive Control, respectively, are presented in this article, first for a hypothetical participant, then on data collected from four HMZ participants. Results demonstrate the effectiveness of the method, with generally best results obtained when estimating energy intake over a weekly time period. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results