DSpace Repository :: Browsing by Subject "CONTROL AUTOMATICO"

Browsing by Subject "CONTROL AUTOMATICO"

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The ARG algorithm: clinical trials in Argentina
(2019) Colmegna, Patricio; Garelli, Fabricio; De Battista, Hernán; Bianchi, Fernando D.; Sánchez-Peña, Ricardo
"The objective of this work is to present a brief review of the control design problem for glucose regulation in T1DM. In particular, control-oriented models, and robust and time-varying controllers will be mentioned. Characteristics of diabetes in general and T1DM in particular in the context of Latin America will be described. Finally, the Automatic Regulation of Glucose (ARG) algorithm will be presented, including in silico and clinical results."
Automatic regulatory control in type 1 diabetes without carbohydrate counting
(2018-05) Colmegna, Patricio; Garelli, Fabricio; De Battista, Hernán; Sánchez-Peña, Ricardo
"A new approach to automatically regulate the glucose level in type 1 diabetes is presented in this work. This is the so-called Automatic Regulation of Glucose (ARG) algorithm, which is based on a switched Linear Quadratic Gaussian (LQG) inner controller, combined with an outer sliding mode safety loop with Insulin on Board (IOB) constraints. In silico and in vivo results without feedforward insulin boluses delivered at meal times indicate that safe blood glucose control can be achieved by the proposed controller. This controller is simple to migrate to well-known hardware platforms, and intuitive to tune using a priori clinical information."
Closed-loop in neuroscience: can a brain be controlled?
(2018) García Violini, Demián; Bertone-Cueto, Nicolás I.; Martínez, Sebastián; Chiesa Docampo, Franco; de la Fuente, Verónica; Belluscio, Mariano; Piriz, Joaquín; Sánchez-Peña, Ricardo
"An experimental setup capable of stimulating, inhibiting, sensing, processing and analyzing a iological system is presented. The experimental setup is based on open-source, open hardware commercial devices. It can be applied to record and control neuronal activity, for example to stablish causal links between neurons and behavior in a closed-loop fashion. Cells or group of cells can be triggered by acoustical, electrical or light impulses. This last case is based on a technique defined as optogenetics. The latter is used in an example that reads and controls neuronal activity of a population of neurons in laboratory rats forcing them to transition between neuronal states, illustrates the system developed in this work. Index Terms—Optogenetics, closed-loop, automatic control, open-source, open-hardware."
Cluster space LPV control of robot formations
(2018-10) Ghersin, Alejandro S.; Giribet, Juan I.; Mas, Ignacio
"Within the Cluster Space robot formation control scheme, a new approach is presented where a cascaded control scheme is proposed. On one hand, a simple secondary (inner) loop is used to control the formation’s velocity in Robot Space, while on the other hand a quasi-LPV (Linear Parameter Varying) approach is employed for the design of the main (outer) control loop where the geometry and kinematics of the problem are captured by the LPV formulation. Certain aspects of the design such as stability are tackled, and the use of parameter-dependent weighting functions is discussed through a design example tested in simulations in order to illustrate the use of the method."
Control automático de pH y cloro para piletas
(2011) Gubitosi, Miguel; Tzovanis, Nicolás; Cossutta, Pablo
"Este proyecto tiene por objetivo desarrollar un equipo que de forma autónoma realice mediciones "en línea" de los parámetros pH y concentración de cloro en piletas residenciales, y basándose en dichas mediciones y las preferencias del usuario, inyecte a la pileta cantidades apropiadas de cloro, ácidos o bases de manera de corregir la desviación registrada (...)."
Control automático para clasificador ciclónico de partículas minerales
(2014) Raffo, Santiago; Salvati, Matías Damián
"El proyecto final de grado realizado por los alumnos de ingeniería electrónica Raffo y Salvati consiste en el control y automatización de un Clasificador de Ciclónico, mediante la medición automática de residuo en una muestra de material clasificado. En base a esta medición se corrige el punto de trabajo del clasificador."
Industry engagement with control research: perspective and messages
(2020) Samad, Tariq; Bauer, Margret; Bortoff, Scott; Di Cairano, Stefano; Fagiano, Lorenzo; Odgaard, Peter Fogh; Rhinehart, R. Russell; Sánchez-Peña, Ricardo; Serbezov, Atanas; Ankersen, Finn; Goupil, Philippe; Grosman, Benyamin; Heertjes, Marcel; Mareels, Iven; Sosseh, Raye
"Despite the enormous benefit that has accrued to society from control technology and the continuedvitality of control science as a research field, there is broad consensus that the practitioners of control andthe academic research community are insufficiently engaged with each other. We explore this concernwith reference to the oft-cited theory/practice gap but also from an industry perspective. The core ofthis article is comprised of ten “messages,”intended primarily for researchers interested in the practicalimpact of their work, that we hope shed insight on the industry mindset. Results from surveys and otherdata are cited to underpin the points. Some educational synergies between industry and academia arealso noted. To highlight the continuing relevance of control science to industry, several recent examples ofsuccessful, deployed advanced control solutions are presented. The authors of this article are members ofthe IFAC Industry Committee, formally established in 2017 with objectives that include (per the updatedIFAC Constitution) “increasing industry participation in and impact from IFAC activities.”"
LPV control of glucose for diabetes type I
(2010) Sánchez-Peña, Ricardo; Ghersin, Alejandro S.
"This paper considers the problem of automatically controlling the glucose level in a Diabetes type I patient. Three issues have been considered: model uncertainty, timevarying/nonlinear phenomena and controller implementation. To that end, the dynamical model of the insulin/glucose relation is framed as a Linear Parameter Varying system and a controller is designed based on it. In addition, this framework allows not only a better performance than other classical methods, but also provides stability and performance guarantees. Design computations are based on convex Linear Matrix Inequality (LMI) optimization. Implementation is based on a low order controller whose dynamics adapts according to the glucose levels measured in real-time."
Multi-UAV specification and control with a single pilot-in-the-loop
(2019-09) Moreno, Patricio; Esteva, Santiago; Mas, Ignacio; Giribet, Juan I.
"This work presents a multi-unmanned aerial vehicle formation implementing a trajectory following controller based on the cluster-space robot coordination method. The controller is augmented with a feed-forward input from a control station operator. This teleoperation input is generated by means of a remote control, as a simple way of modifying the trajectory or taking over control of the formation during flight. The cluster-space formulation presents a simple specification of the system’s motion and, in this work, the operator benefits from this capability to easily evade obstacles by means of controlling the cluster parameters in real time. The proposed augmented controller is tested in a simulated environment first, and then deployed for outdoor field experiments. Results are shown in different scenarios using a cluster of three autonomous unmanned aerial vehicles."
Multi-UAV specification and control with a single pilot-in-the-loop
(2020-10) Moreno, Patricio; Esteva, Santiago; Mas, Ignacio; Giribet, Juan I.
"This work presents a multi-unmanned aerial vehicle formation implementing a trajectory-following controller based on the clusterspace robot coordination method. The controller is augmented with a feed-forward input from a control station operator. This teleoperation input is generated by means of a remote control, as a simple way of modifying the trajectory or taking over control of the formation during flight. The cluster-space formulation presents a simple specification of the system’s motion and, in this work, the operator benefits from this capability to easily evade obstacles by means of controlling the cluster parameters in real time. The proposed augmented controller is tested in a simulated environment first, and then deployed for outdoor field experiments. Results are shown in different scenarios using a cluster of three autonomous unmanned aerial vehicles."
Non-pharmaceutical intervention to reduce COVID-19 impact in Argentina
(2022-05) García Violini, Demián; Sánchez-Peña, Ricardo; Moscoso-Vásquez, Marcela; Garelli, Fabricio
"This work is focused on the multilevel control of the population confinement in the city of Buenos Aires and its surroundings due to the pandemic generated by the COVID-19 outbreak. The model used here is known as SEIRD and two objectives are sought: a time-varying identification of the infection rate and the inclusion of a controller. A control differential equation has been added to regulate the transitions between confinement and normal life, according to five different levels. The plasma treatment from recovered patients has also been considered in the control algorithm. Using the proposed strategy the ICU occupancy is reduced, and as a consequence, the number of deaths is also decreased."
Non-pharmaceutical intervention to reduce COVID-19 impact in Argentina
(2021-06-21) García Violini, Demián; Sánchez-Peña, Ricardo; Moscoso-Vásquez, Marcela; Garelli, Fabricio
"This work is focused on the multilevel control of the population confinement in the city of Buenos Aires and its surroundings due to the pandemic generated by the COVID-19 outbreak. The model used here is known as SEIRD and two objectives are sought: a time-varying identification of the infection rate and the inclusion of a controller. A control differential equation has been added to regulate the transitions between confinement and normal life, according to five different levels. The plasma treatment from recovered patients has also been considered in the control algorithm. Using the proposed strategy the ICU occupancy is reduced, and as a consequence, the number of deaths is also decreased."
Optimización del procesamiento de gas natural a través de un sistema de control centralizado
(2009) Strada, Federico; Casale, Alejandro; Shiratori, Julio
Reducing glucose variability due to meals and postprandial exercise in TI DM using switched LPV control: in silico studies
(2016) Colmegna, Patricio; Sánchez-Peña, Ricardo; Gondhalekar, Ravi; Dassau, Eyal; Doyle III, Frank J.
"Time-varying dynamics is one of the main issues for achieving safe blood glucose control in type I diabetes mellitus (TI DM) patients. In addition, the typical disturbances considered for controller design are meals, which increase the glucose level, and physical activity (PA), which increases the subject's sensitivity to insulin. In previous works the authors have applied a linear parameter-varying (LPV) control technique to manage unannounced meals."
Simulation & control in type 1 diabetes
(2015) Colmegna, Patricio; Sánchez-Peña, Ricardo
"The study of Type 1 Diabetes has grown exponentially over the years. Thus, a huge number of scientic articles that are focused on this disease can be found. In this thesis, two issues are mainly addressed. Firstly, the most relevant mathematical models that describe the insulin-glucose dynamics are analysed. Through that analysis, the main features of these models are presented, and their advantages and disadvantages are described. Also, several inconsistencies that appear in previous works are pointed out. On the other hand, different control algorithms that are aimed towards maintaining the glucose levels in a safe region are studied. The main challenge is to obtain a controller that achieves safe blood glucose control, despite issues like actuator saturation, measurement noise and high inter- and intra-subject variability. Due to the fact that an articial pancreas scheme involves glucose measurement and insulin infusion through the subcutaneous route, there are delays that make the control problem even more challenging. In addition, in order to minimise the patient self-management of his/her disease, it is assumed that meals are unannounced, i.e., the controller does not receive any warning related to meal times or meal sizes either."
Sistema de asistencia a la gestión de riesgos en proyectos software de sistemas industriales de automatización y control
(2006) Río, José Luis del; Diez, Eduardo; Rancan, Claudio
"El presente trabajo tiene como objetivo desarrollar un Sistema asistente de gestión de riesgos (SGR), para proyectos de software, en dominio de SAC que resuelva el problema en cuestión"
Sistema de control para un robot aerodeslizante
(2019-11) Pecker Marcosig, Ezequiel; Presenza, Francisco; Giribet, Juan I.; Mas, Ignacio
"En este trabajo se presenta la construcción de un robot aerodeslizante, y la implementación del sistema de medición y control utilizando ROS (Robot Operating System). Este vehículo fue diseñado para el estudio de estrategias de control híbrido en sistemas ciber-físicos. Para comprobar el funcionamiento de esta plataforma se cerró el lazo utilizando una estrategia de control simple (PID). Se presentan los resultados experimentales preliminares obtenidos para el seguimiento de referencias."
Time-varying procedures for insulin-dependent diabetes mellitus control
(2011-03) Sánchez-Peña, Ricardo; Ghersin, Alejandro S.; Bianchi, Fernando D.
"This work considers the problem of automatically controlling the glucose level in insulin dependent diabetes mellitus (IDDM) patients. The objective is to include several important and practical issues in the design: model uncertainty, time variations, nonlinearities, measurement noise, actuator delay and saturation, and real time implementation. These are fundamental issues to be solved in a device implementing this control. Two time-varying control procedures have been proposed which take into consideration all of them: linear parameter varying (LPV) and unfalsiﬁed control (UC). The controllers are implemented with low-order dynamics that adapt continuously according to the glucose levels measured in real time in one case (LPV) and by controller switching based on the actual performance in the other case (UC). Both controllers have performed adequately under all these practical restrictions, and a discussion on pros and cons of each method is presented at the end."
Trajectory following with a MAV under rotor fault conditions
(2019-09) Pose, Claudio D.; Presenza, Francisco; Mas, Ignacio; Giribet, Juan I.
"Lately, a novel multirotor aerial vehicle capable of handling single rotor failures was presented. When a rotor fails, physically reconfiguring one of the remaining rotors of an hexarotor allows to compensate for maneuverability limitations. In this work, experimental results show the performance of the vehicle in a trajectory-following task in both nominal and fault conditions."

Browsing by Subject "CONTROL AUTOMATICO"

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