Papers by Federico Baronti
2009 Design, Automation & Test in Europe Conference & Exhibition, 2009
This paper presents a low-cost and simple distributed force sensor that is particularly suitable ... more This paper presents a low-cost and simple distributed force sensor that is particularly suitable for measuring grip force and hand position on a steering wheel. The sensor can be used in automotive active safety systems that aim at detecting driver's fatigue, which is a major issue to prevent road accidents. The key point of our approach is to design a chain of sensor units, each of them provided with some intelligence and general purpose capabilities, so that it can serve as platform for integrating different kinds of sensors into the steering wheel. A proof-of-concept demonstration of the distributed sensor consisting of 16 units based on capacitive sensing elements has been realised and preliminary results are presented.
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
ABSTRACT This paper aims at investigating and modelling the hysteresis in the relationship betwee... more ABSTRACT This paper aims at investigating and modelling the hysteresis in the relationship between state-of-charge and open-circuit voltage of lithium-iron-phosphate batteries. A first-order charge relaxation equation was used to describe the hysteresis dynamics. This equation was translated into a voltage-controlled voltage source and included within an equivalent electric circuit of the battery used in online state-of-charge estimators. The effectiveness of the obtained battery model was verified comparing simulated and experimental data.
IMTC/2002. Proceedings of the 19th IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.00CH37276), 2002
An on-chip non-linearity self-calibration of a CMOS all-digital shunt capacitor delay-line is ach... more An on-chip non-linearity self-calibration of a CMOS all-digital shunt capacitor delay-line is achieved by first measuring the non-linearity of each delay-cell by means of a statistical test and then correcting the individual cell delay mismatch according to the test results. An iterative calibration algorithm has been developed and a fully digital circuit efficiently implementing the calibration procedure has been designed.
Proceedings of the 2002 IEEE International Frequency Control Symposium and PDA Exhibition (Cat. No.02CH37234), 2002
A Digital-to-Time Converter (DTC) based on a Delay-Locked Loop (DLL) for phase interpolation in D... more A Digital-to-Time Converter (DTC) based on a Delay-Locked Loop (DLL) for phase interpolation in Direct Digital Synthesis (DDS) applications is described. The conversion is made in two steps using digitally controllable delay cells with configurable shunt-capacitors load. The circuit is able to interpolate a 120 MHz clock, generating a delay proportional to an 8-bit digital control word with 32 ps
An accurate model of the elementary accumulation device is fundamental for sizing and controlling... more An accurate model of the elementary accumulation device is fundamental for sizing and controlling the battery pack to be used in electric and hybrid vehicles. Indeed, the implementation of such a model within the Battery Management System makes it possible to evaluate the status and the behavior of the battery pack in every condition and to apply a correct control
Inorganic Chemistry Communications, 2001
A reduction of the non-linearity of a CMOS all-digital shunt-capacitor delay-line is achieved by ... more A reduction of the non-linearity of a CMOS all-digital shunt-capacitor delay-line is achieved by performing an on-line statistical test of the line and correcting the individual cell delay mismatch according to the test results. A fully digital cell controller efficiently implementing the calibration procedure has been realized. Simulation results show the feasibility of the technique and the substantial reduction of
Lithium-ion batteries are increasingly being used in safety-critical applications, such as automo... more Lithium-ion batteries are increasingly being used in safety-critical applications, such as automotive, avionics and aerospace systems. They require the adoption of an electronic control system, called Battery Management System (BMS), to guarantee their safe and effective operation. Therefore, the reliability of the BMS is of paramount importance. In this paper, we analyze the effects of Single Event Upsets (SEUs) occurring in the control logic of an important BMS subsystem, i.e., the charge equalizer. Moreover, some SEU mitigation techniques based on logic redundancy are presented and their effectiveness is compared through fault simulation.
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012
ABSTRACT The architecture of a hierarchical Battery Management System is presented focusing on th... more ABSTRACT The architecture of a hierarchical Battery Management System is presented focusing on the design of its hardware building blocks. The system is intended to be used in a fuel-cell powered van and the design is optimized for large lithium battery packs. The developed BMS provides monitoring and protection functions, together with a high efficiency cell equalization circuit that can selectively adjust the State of Charge of each cell of the pack. A preliminary experimental validation of some building blocks is presented and measurement results are discussed.
2007 Mediterranean Conference on Control & Automation, 2007
Comfort and safety of vehicles significantly depends on the behavior of the suspension system. Th... more Comfort and safety of vehicles significantly depends on the behavior of the suspension system. This is particularly true in two-wheel vehicles where the equilibrium is fundamental. Variations of the static load on the vehicle determine a compression of the suspension spring that modifies the static equilibrium point with respect to the optimal value. The system we describe is capable of
2010 17th IEEE International Conference on Electronics, Circuits and Systems, 2010
ABSTRACT The availability of an accurate model capable of simulating the dynamic behavior of a ce... more ABSTRACT The availability of an accurate model capable of simulating the dynamic behavior of a cell is important for sizing and controlling the battery for electric and hybrid vehicle. Moreover, including the thermal behavior of cell into the model is very useful when designing the battery pack layout and its cooling system. This work shows the characterization and modeling of a commercial Lithium-Polymer Cell. Particular attention has been paid to consider the thermal effects on the model parameters. The developed model has been used to predict the cell behavior in different operating conditions and the simulated data has been compared to equivalent experimental ones.
2010 17th IEEE International Conference on Electronics, Circuits and Systems, 2010
2008 IEEE Intelligent Vehicles Symposium, 2008
Motorcycles are becoming the preferred means of transportation for many people in crowded and mil... more Motorcycles are becoming the preferred means of transportation for many people in crowded and mild climate cities. Nevertheless, they still offer a rather low level of safety, as compared to cars, in which the use of electronic systems has led to effective improvements of the vehicle safety. The purpose of this paper is to show the feasibility of a very
2008 15th IEEE International Conference on Electronics, Circuits and Systems, 2008
In blood transfusion procedures, it is necessary to guarantee that each patient actually receives... more In blood transfusion procedures, it is necessary to guarantee that each patient actually receives the blood unit which has been assigned to him, so that mistransfusions are avoided. For this reason, before starting the administration, a cross-check involving the patient and the trasfusion unit codes must be carried out at bedside. To perform these tests in a safe and fast way, several electronic solutions based on barcode labels and RFID tags have been adopted in the last few years. However, most reliable results are still obtained by means of barrier systems, i.e. mechanical devices that prevent the use of units until the cross-check is positive. In this paper, we present a microcontroller-based barrier system which can easily be integrated with common barcode/RFID-based solutions, so that an even higher safety degree is achievable together with simple and fast utilization. The system provides blood unit temperature monitoring and event logging capabilities, can be controlled by means of a wireless connection, and is powered by a high capacity Li-ion battery, which ensures long operating cycles. Moreover, it features a simple human interface, and appears rather small and light, thus resulting definitely suitable for the clinical settings. Once implemented, the system has been successfully validated by means of a Lab VIEW interface emulating a typical medical facility set-up. Currently, two on-site applications show a remarkable safety and speed improvement in performing cross-check procedures.
10th Euromicro Conference on Digital System Design Architectures, Methods and Tools (DSD 2007), 2007
This paper describes a hardware-software platform suitable for rapid prototyping of electronic sy... more This paper describes a hardware-software platform suitable for rapid prototyping of electronic systems for in-motorcycle applications. The hardware platform architecture is characterized by two programmable components consisting of an 8-bit microcontroller and a PC-like device, such as a portable PC or a PDA, which communicate by means of a Bluetooth wireless link or a CAN bus. The application can dynamically
2005 12th IEEE International Conference on Electronics, Circuits and Systems, 2005
ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483), 2001
A reduction of the non-linearity of a CMOS all-digital shunt-capacitor delay-line is achieved by ... more A reduction of the non-linearity of a CMOS all-digital shunt-capacitor delay-line is achieved by performing an on-line statistical test of the line and correcting the individual cell delay mismatch according to the test results. A fully digital cell controller efficiently implementing the calibration procedure has been realized. Simulation results show the feasibility of the technique and the substantial reduction of
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Papers by Federico Baronti