Antonio Visioli

Antonio Visioli
University of Brescia | UNIBS · Department of Mechanical and Industrial Engineering

PhD

About

475
Publications
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9,199
Citations

Publications

Publications (475)
Article
Full-text available
El uso de captadores solares planos está muy extendido principalmente para aplicaciones de calefacción y refrigeración de edificios y agua caliente sanitaria. Una de las líneas de investigación para mejorar el rendimiento térmico y reducción de espacio ocupado es el uso de reflectores que permiten incrementar la radiación solar incidente sobre la c...
Article
Full-text available
En este trabajo se presentan resultados preliminares de un método práctico de identificación para su uso en laboratorio o en industria. La propuesta viene motivada por la necesidad de obtener los parámetros de un modelo de intercambiador a partir de mediciones de campo. El trabajo se centra en parte de una planta de almacenamiento de energía en con...
Article
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...
Article
Full-text available
In this paper we propose a design methodology for a cascade control system where the two controllers are of fractional-order-proportional-integral-derivative type. The tuning of the inner (secondary) controller aims to achieve a high performance (in terms of the integrated absolute error) in the load disturbance rejection task by exploiting the fra...
Article
Full-text available
In this paper we propose a human-imitating control methodology for the Depth-of-Hypnosys (DoH) in total intravenous anesthesia (TIVA) where the bispectral index (BIS) is used as process variable. The method suitably combines a move-blocking model predictive controller (MPC) that minimizes the time-to-target when the BIS value is not in the required...
Article
Developing accurate mathematical or data-driven models for effective controller design under dynamic variable conditions becomes increasingly challenging. For this reason, the concept of a digital twin (DT) as a virtual representation of a physical asset has been introduced as a tool for process modelling, design, and control implementation while p...
Article
Full-text available
The recent introduction of the Conox monitoring system in the clinical practice of total intravenous anesthesia (TIVA) has opened new research opportunities. Indeed, it provides the qCON and the qNOX indexes, which give a measure of hypnosis and analgesia, respectively. This paper presents the first experimental results of closed-loop anesthesia pe...
Article
In this article, a predictive event‐based control architecture for multivariable drug infusion in the anesthesia process is presented. The control scheme considers a multiple‐input single‐output process, where the depth of hypnosis is the controlled variable and the infusion rates of propofol and remifentanil, which are co‐administered by imposing...
Article
Full-text available
This paper investigates the performance achievable with a fractional-order PID regulator controlling the Depth of Hypnosis (measured via the Bispectral Index Scale) through the administration of propofol during the maintenance phase of total intravenous anesthesia. In particular, two different methodologies were applied to tune the controller: in t...
Article
This article focuses on extending, disseminating and interpreting the findings of an IEEE Control Systems Society working group looking at the role of control theory and engineering in solving some of the many current and future societal challenges. The findings are interpreted in a manner designed to give focus and direction to both future educati...
Article
This paper presents the first experimental results obtained with an event-based PID regulator for closed-loop control of general anesthesia. The control system exploits the bispectral index scale as feedback variable and regulates the coadministration of propofol and remifentanil. The experiments have been conducted on fourteen patients under condi...
Article
Full-text available
In this paper we present experimental results obtained by applying a Model Predictive Control strategy for the control of Depth of Hypnosis in general anesthesia. In particular, the Bispectral Index Scale is employed as the controlled variable and the administration of the hypnotic drug propofol is determined by applying a Generalized Predictive Co...
Article
Background and Objective: The automatic control of anesthesia is a demanding task mostly due to the presence of nonlinearities, intra- and inter-patient variability and specific clinical requirements to be meet. The traditional approach to achieve the desired depth of hypnosis level is based on knowledge and experience of the anesthesiologist. In c...
Article
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 control...
Article
In this paper we present the experience of online teaching of some control courses during two years of covid-19 pandemic at the University of Brescia. Different (undergraduate and postgraduate) courses are considered and a survey has been conducted with the students to evaluate pros and cons of the new way of teaching. A specific initiative employe...
Article
The Technical Committees for Control Education of IFAC and IEEE have started a collaborative initiative to collect, curate, and disseminate high quality freely available resources that support instruction of the first control course for undergraduate students in engineering and applied sciences programs. An initial survey with limited distribution...
Article
In this paper we present an interactive software tool that can be used to learn how to design a PIDA controller. After having selected a process model, the user can modify the controller parameters and evaluate the corresponding changes in the control system responses. In particular, the user can evaluate the set-point step response, the load distu...
Article
In this paper, a model predictive control system for the depth of hypnosis is proposed and analyzed. This approach considers simultaneous co-administration of the hypnotic and analgesic drugs and their effect on the Bispectral Index Scale (BIS). The control scheme uses the nonlinear multiple-input–single-output (MISO) model to predict the remifenta...
Article
Full-text available
This paper deals with the design of a control system based on fractional order models and fractional order proportional-integral-derivative (FOPID) controllers and fractional-order proportional-integral (FOPI) controllers. The controller design takes into account the trade-off between robustness and performance as well as the trade-off between the...
Preprint
Full-text available
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...
Article
In this paper, we present tuning rules for PI controllers that represent an effective alternative to the well‐known lambda‐tuning for the load disturbance rejection task. In particular, the integrated absolute error is minimized subject to a constraint on the maximum sensitivity selected. Suitable formulas are given to relate the proposed tuning wi...
Article
Irradiance and temperature are among the most important variables that affect microalgae growth, being both difficult to control in outdoor raceway reactors utilized for large‐scale production of microalgae biomass. They are mainly a function of the location of the reactors, thus, producing certain strains of microalgae in inappropriate places cond...
Conference Paper
The Technical Committees for Control Education of IFAC and IEEE have started a collaborative initiative to collect, curate, and disseminate high quality freely available resources that support instruction of the first control course for undergraduate students in engineering and applied sciences programs. An initial survey with limited distribution...
Article
In this paper we present a new model predictive control system for the depth of hypnosis in general anesthesia. The depth of hypnosis is measured by the Bispectral Index Scale signal and controlled through propofol administration. The proposed control scheme is based on an external predictor that, by exploiting the Wiener structure of the pharmacok...
Article
Background and objective: Many methodologies have been proposed for the control of total intravenous anesthesia in general surgery, as this yields a reduced stress for the anesthesiologist and an increased safety for the patient. The objective of this work is to design a PID-based control system for the regulation of the depth of hypnosis by propo...
Conference Paper
In recent years the IFAC technical committee has been looking closely at what constitutes an ideal first course in control. Having completed stage 1 of this study, the community is now discussing how to best collate and share the numerous open access resources to support such a course, or indeed more advanced control courses, which staff and studen...
Conference Paper
. A control system problem can be viewed as a multi- objective problem due to the fact that there are many requirements to be satisfied. Nowadays, multi-objective optimization deals with this kind of problem by implementing optimization techniques, capable of searching for the Pareto set approximation, hereafter the designer needs to select the bes...
Article
Full-text available
En los sistemas de producción de microalgas, además del pH y el oxígeno disuelto, otros parámetros que afectan de forma considerable al crecimiento de las microalgas son la radiación solar y la temperatura. La radiación solar no es controlable y es considerada como la principal perturbación del sistema. En relación a la temperatura, un valor inadec...
Article
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 t...
Article
In this paper we propose a methodology for a patient-individualized tuning of the parameters of a proportional–integral–derivative (PID) controller that regulates the depth of hypnosis in the maintenance phase of general anesthesia. In particular, we consider a PID controller employed in a closed-loop multiple-input–single-output (MISO) control sys...
Conference Paper
Digital transformation involves the use of breaking technologies that increase the knowledge of a physical system. One of these technologies is the Digital Twin, which is a realistic virtual representation that reflects the current conditions of a physical system process that allows advanced and more detailed analysis towards improving system perfo...
Article
Proportional-integral-derivative (PID) controllers are undoubtedly the most employed controllers in industry, and they have significantly contributed to the impact of control systems in society. This book is a very welcome addition to the PID control literature as it aims to reduce the gap between theory and practice and foster technology transfer...
Article
Objective We propose the use of an optimization strategy for the determination of the initial propofol bolus for the induction phase of general anesthesia. Methods The optimized bolus minimizes the time-to-target and it is used as a feedforward action together with a specifically tuned PID feedback control system where the bispectral index is the...
Data
This video demonstrates the effectiveness of the proposed real-time trajectory scaling method in improving the path tracking performance of a UR10 robot.
Article
Full-text available
Modern robotic systems must be able to react to unexpected environmental events. To this purpose, planning techniques for the real-time generation/modification of trajectories have been developed in recent times. In the frequent case of applications which require following a predefined path, the assigned time-law must be inspected in real time so a...
Article
In this paper we present the preliminary clinical results obtained with a PID control scheme for propofol and remifentanil coadministration during general anesthesia. The bispectral index scale is the only process variable, and the extra degree of freedom in the control architecture is handled by introducing an appropriate ratio between the infusio...
Article
Full-text available
This paper presents the Mechanical Ventilator Milano (MVM), a novel intensive therapy mechanical ventilator designed for rapid, large-scale, low-cost production for the COVID-19 pandemic. Free of moving mechanical parts and requiring only a source of compressed oxygen and medical air to operate, the MVM is designed to support the long-term invasive...
Article
Full-text available
In this study, the authors present robust tuning rules for an event‐based control architecture for the automatic regulation of the depth of hypnosis in anaesthesia. The authors' control system uses propofol and remifentanil coadministration as control variables and the bispectral index as controlled variable. The control system is based on a PIDPlu...
Article
In this paper we investigate a novel tuning methodology for a patient-individualized selection of the parameters of a proportional-integral-derivative (PID) controller that regulates the maintenance phase of general anesthesia. In particular, the knowledge of demographic data is exploited to determine the values of the parameters for each specific...
Article
Full-text available
In the practice of total intravenous anesthesia, the regulation of the balance between opioid and hypnotic drugs is fundamental since it has a significant impact on depth of hypnosis and hemodynamics. Therefore, in the implementation of a fully automated control system for anesthesia, this aspect must be considered. In a recently devised PID-based...
Conference Paper
In this paper we propose the use of an optimization strategy for the computation of an optimized reference (command) input to be applied to a proportional-integral-derivative (PID) based closed-loop control system for the administration of propofol during the induction phase of general anesthesia. The bispectral index scale (BIS) is the controlled...
Article
Full-text available
Temperature and irradiance are the two most relevant factors determining the performance of microalgae cultures in open raceway reactors. Moreover, inadequate temperature strongly reduces the biomass productivity in these systems even if enough sunlight is available. Controlling the temperature in large open raceway reactors is considered unafforda...
Article
Full-text available
In this study a simplified temperature model for raceway reactors is developed, allowing to determine the temperature of the microalgae culture as a function of reactor design and environmental conditions. The model considers the major phenomena taking place in raceway reactors, especially heat absorption by radiation and heat losses by evaporation...
Article
Full-text available
Robotized assembly and manufacturing often require to modify the robot motion at runtime. When the primary constraint is to preserve the geometrical path as much as possible, it is convenient to scale the nominal trajectory in time to meet the robot constraints. Look-ahead techniques are computationally heavy, while non-look-ahead ones usually show...
Article
Full-text available
The paper discusses the strategies that should be applied to maximize the impact of control systems in our society. This is achieved, in particular, by revealing the role of control systems (at different levels) in different fields and by reducing the theory/practice gap so that methodologies proposed by academic researchers can be transferred to i...
Chapter
Full-text available
Event-based solutions for process control applications are of clear increasing interest. The approach is really appealing because of clear advantages for what matters to minimal use of communication bandwidth, energy consumption, etc. Therefore, completely appropriate for the wireless sensor-actuator networks. One of the solutions that, at least wi...
Conference Paper
Lambda tuning is frequently employed for PI(D) controllers in the process industry because of its simplicity and intuitiveness for the user. In this paper we analyze the fundamental choice of the tuning parameter l , that is, of the desired closed-loop time constant, by considering different trade-offs that can be posed by the user in the controlle...
Article
This paper summarises the results of an international survey of academics and industrialists on what should be prioritised in the first, and often only, control course taken by engi