Papers by Alessandro Andreoli
Renewable Energy and Power Quality Journal, 2009
The proposed paper discusses the realization of a system prototype able to perform a permanent mo... more The proposed paper discusses the realization of a system prototype able to perform a permanent monitoring of a switchboard in order to allow the manufacturer the complete management of all the measurable quantities in the switchboard, specially the sensed voltage for each line. The main purpose is to prevent any fault that can affect the switchboard and provide an instant alarming if anomalous values are revealed. The significant aspect of our prototype is the internetworking between several standard network protocols. In fact, the acquisition network sends the acquired data using the EIA 485 serial protocol. These data are then collected into an embedded web server ad-hoc developed. The server can be connected to the Internet in a wired and/or wireless way using the IEEE 802.3 (Ethernet) and the IEEE 802.11 (Wi-Fi) protocols. Finally, the web server uses standard TCP/IP protocols, such as HTTP to manage the web pages and SMTP to dispatch automatic alarm notifications via e-mails.
Automotive propulsion drive emulation using two cascaded inverters
The paper is devoted to the development of a numerically-controlled experimental bench dedicated ... more The paper is devoted to the development of a numerically-controlled experimental bench dedicated to the testing of automotive electric drives. The bench is built around (i) a power system made up of two DC-AC converters with their AC sides connected through a three phase inductor, and (ii) a control system incorporating a NI PXI interface in which is embedded a real-time simulation HIL system. The control of the power system is simply achieved by two analog signals that are converted to PWM signals driving the switches of the DC-AC converters. The potentialities of the developed bench are highlighted through the emulation of different automotive cycles including acceleration and braking.
Software-in-the-loop simulation of a test system for automotive electric drives
The Automotive market is rapidly changing, as the increasing attention to the engine emissions pu... more The Automotive market is rapidly changing, as the increasing attention to the engine emissions pushes car makers to use vehicles less dependent on gasoline and diesel fuel, resulting in lower operating costs and emissions. Today, electric vehicles seem to be the best answer to the market demand. In this scenario, electric drives for traction play a key role, thus the necessity to develop effective and flexible test systems, able to ensure performance, quality and safety. In this paper a new automotive electric drives test system is proposed. The test system for electric drives is based on an inverter controlled through a real-time platform in which the Electric Vehicle model is implemented. The inverter emulates the behaviour of the motor and load at the load drive terminals. This paper describes the architecture of the system and shows the real-time simulation results. Three control methods are used for the load drive and compared in the paper.
Sensors and algorithms development for body sensor networks in healthcare environment
... Autore: Andreoli, Alessandro. Tutor: Pierleoni, Paola. Data di discussione: 21-gen-2011. ... ... more ... Autore: Andreoli, Alessandro. Tutor: Pierleoni, Paola. Data di discussione: 21-gen-2011. ... Nella seconda parte verrá presentata una panoramica sui media gateway in particolare sui transcoder video per gli standard di codi ca video H.263+ e H.264. ...
Emulation And Testing For Automotive Propulsion Drive Using Two Cascaded Inverters
IEEE Transactions on Industry Applications
Abstract—The present paper,concerns,the reduction,of com- putational burden,on the estimation of ... more Abstract—The present paper,concerns,the reduction,of com- putational burden,on the estimation of prediction modes,in Intra frame,from,H.263 to H.264 AVC streams,transcoding,process. Scope of this work,is to achieve the possibility of communication between,new,and existing video coding systems that do not share the same codec, but they use different video codecs, e.g. video- conference,and,UMTS. Differences exist between,the frequency domain,prediction in H.263+ and the spatial domain,prediction
Comparison of H.264/AVC, H.264 with AIF, and AVS based on different video quality metrics
2009 International Conference on Telecommunications, 2009
ABSTRACT Video communication has a very important role nowadays. Also very efficient video coding... more ABSTRACT Video communication has a very important role nowadays. Also very efficient video coding techniques are developed in order to provide high quality video streams using all the available bandwidth. In this work we perform a comparison between three different video codecs: the ITU-T H.264, an improved ITU-T H.264 version including the AIF (adaptive interpolation filter), and the AVS (audio and video coding standard) that is the Chinese standard video codec. The realized tests involve eight standard video sequences that are coded end decoded using the mentioned standards. Then, for each sequence we evaluate the video quality using four objective metrics: PSNR (peak signal-to-noise ratio), VQM (video quality metric), SSIM (structural similarity), and the HSM (HVS-human visual system-similarity measure). While PSNR and VQM take into account the mathematical features of the video sequences, SSIM and HSM are based on the HVS theory. So it is possible to evaluate also the human eye perceived quality. The realized analysis is related to the relationship between the bitrate and the quality indexes. The conclusions of our analysis can give an evaluation about several codec performances and can be useful for developers to plan and manage their network. Also, taking into account the HSM scores, the AVS has better performance than the ITU-T video codecs.
2008 10th International Conference on Advanced Communication Technology, 2008
The proposed paper concerns the reduction of computational complexity on the estimation of predic... more The proposed paper concerns the reduction of computational complexity on the estimation of prediction modes in Intra frame from H.263 to H.264 streams transcoding process. Aim of this work is to achieve the possibility of communication between different video coding systems using distinct video codecs. In this paper we proposed a combination of two new algorithms for reusing of H.263 prediction mode in H.264 Intra coding. Performance in term of PSNR of our algorithms are compared to the full transcoding approach. A high correlation between PSNR scores is obtained, with a significant reduction of computational burden.
2009 IEEE/INFORMS International Conference on Service Operations, Logistics and Informatics, 2009
RFID technology is in great demand. Moreover, RFID devices are widely available and at low costs.... more RFID technology is in great demand. Moreover, RFID devices are widely available and at low costs. So they can be used for a wide range of applications, such as supply chain, security, objects tracking, etc. In this paper we apply the RFID technology in conjunction with the well-known Internet protocols to realize an online customer satisfaction survey applied to kart racing. Especially we focus on the tyre evaluation by kart team mechanics. The proposed application should be a valid aid to the tyre companies. Specially the work is focused on all those companies whose clients are kart teams. Since kart world has not the same fundings availability as Fl, we have to deploy a very cheap survey. For this purpose, RFID technology is a good choice, considering particularly passive RFID tags. Passive tags are embedded into the tyre during the vulcanization step. Then the tag can be read by a reader and the retrieved data are transferred to web and to a database server in order to collect more information about the tyre. Finally, the mechanics rate the analized tyre by filling a satisfaction form. Moreover all the rates can be analyzed by the tyre company in order to evaluate the quality of its products.
SPINE-HRV: A BSN-Based Toolkit for Heart Rate Variability Analysis in the Time-Domain
Lecture Notes in Electrical Engineering, 2010
... for all 5 min segments in the entire recordings RMSSD ms Root mean square of the difference o... more ... for all 5 min segments in the entire recordings RMSSD ms Root mean square of the difference of successive RR intervals SDSD ms Standard ... SPINE provides libraries of protocols, utilities and data processing functions and support to easily specify new services and fea-tures. ...
Time-domain heart rate variability analysis with the SPINE-HRV toolkit
Proceedings of the 3rd International Conference on PErvasive Technologies Related to Assistive Environments - PETRA '10, 2010
... 2. Another measure cal-culated from successive RRi differences is the NN50 which is the ... P... more ... 2. Another measure cal-culated from successive RRi differences is the NN50 which is the ... Power spectral density (PSD) analysis provides the basic information of how power (ie variance) is ... [7] Salahuddin, L., and Kim, D. Detection of acute stress by heart rate variability using a ...
Sensors and algorithms development for body sensor networks in healthcare environment
... Autore: Andreoli, Alessandro. Tutor: Pierleoni, Paola. Data di discussione: 21-gen-2011. ... ... more ... Autore: Andreoli, Alessandro. Tutor: Pierleoni, Paola. Data di discussione: 21-gen-2011. ... Nella seconda parte verrá presentata una panoramica sui media gateway in particolare sui transcoder video per gli standard di codi ca video H.263+ e H.264. ...
gtti.it
AbstractThe present paper concerns the reduction of com-putational burden on the estimation of p... more AbstractThe present paper concerns the reduction of com-putational burden on the estimation of prediction modes in Intra frame from H.263 to H.264 AVC streams transcoding process. Scope of this work is to achieve the possibility of communication between new and existing ...
Proceedings of the 2010 International Conference on Body Sensor Networks, Jun 7, 2010
Employment of BSN-based technologies in real world scenarios requires a flexible infrastructure a... more Employment of BSN-based technologies in real world scenarios requires a flexible infrastructure at both hardware and software level. In this paper, we emphasize how the use of SPINE (Signal Processing In-Node Environment), a software framework for BSN, supports the development of heterogeneous health-care applications based on reusable subsystems. One of the main goal of SPINE is to provide a flexible architecture that can support variety of practical applications without the need for costly redeployment of the code running on sensor nodes. We also present a SPINE sensor node emulator that supports the first phase of the algorithm design, when the actual hardware devices may not be available. This approach can guide the choice of the required hardware (e.g. the sensors) to meet the application requirements based on the results obtained in the emulated environment. Such tool can simplify the research collaboration during the specification stage of a project, due to availability of a common (virtual) architecture.
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Papers by Alessandro Andreoli