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| 2. |
- Walker, Anthony P, et al.
(författare)
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Horizon 2020 EuPRAXIA design study
- 2017
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Ingår i: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 874:1
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Tidskriftsartikel (refereegranskat)abstract
- The Horizon 2020 Project EuPRAXIA ("European Plasma Research Accelerator with eXcellence In Applications") is preparing a conceptual design report of a highly compact and cost-effective European facility with multi-GeV electron beams using plasma as the acceleration medium. The accelerator facility will be based on a laser and/or a beam driven plasma acceleration approach and will be used for photon science, high-energy physics (HEP) detector tests, and other applications such as compact X-ray sources for medical imaging or material processing. EuPRAXIA started in November 2015 and will deliver the design report in October 2019. EuPRAXIA aims to be included on the ESFRI roadmap in 2020.
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| 3. |
- Baldoni, R., et al.
(författare)
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An embedded middleware platform for pervasive and immersive environments for-all
- 2009
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Ingår i: 2009 6th IEEE Annual Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks Workshops, SECON Workshops 2009. - : IEEE. - 9781424439386 ; , s. 161-163
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Konferensbidrag (refereegranskat)abstract
- Embedded systems are specialized computers used in larger systems or machines to control equipments such as automobiles, home appliances, communication, control and office machines. Such pervasivity is particularly evident in immersive realities, i.e., scenarios in which invisible embedded systems need to continuously interact with human users, in order to provide continuous sensed information and to react to service requests from the users themselves. The SM4All project investigates an innovative middleware platform for inter-working of smart embedded services in immersive and person-centric environments, through the use of composability and semantic techniques for dynamic service reconfiguration. This is applied to the challenging scenario of private houses and home-care assistance in presence of users with different abilities and needs (e.g., young, able-bodied, aged and disabled). This paper presentes a brief overview of the SM4All system architecture.
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| 4. |
- Ciani, L., et al.
(författare)
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Condition-Based Maintenance of HVAC on a High-Speed Train for Fault Detection
- 2021
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Ingår i: Electronics. - : MDPI. - 2079-9292. ; 10:12
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Tidskriftsartikel (refereegranskat)abstract
- Reliability-centered maintenance (RCM) is a well-established method for preventive maintenance planning. This paper focuses on the optimization of a maintenance plan for an HVAC (heating, ventilation and air conditioning) system located on high-speed trains. The first steps of the RCM procedure help in identifying the most critical items of the system in terms of safety and availability by means of a failure modes and effects analysis. Then, RMC proposes the optimal maintenance tasks for each item making up the system. However, the decision-making diagram that leads to the maintenance choice is extremely generic, with a consequent high subjectivity in the task selection. This paper proposes a new fuzzy-based decision-making diagram to minimize the subjectivity of the task choice and preserve the cost-efficiency of the procedure. It uses a case from the railway industry to illustrate the suggested approach, but the procedure could be easily applied to different industrial and technological fields. The results of the proposed fuzzy approach highlight the importance of an accurate diagnostics (with an overall 86% of the task as diagnostic-based maintenance) and condition monitoring strategy (covering 54% of the tasks) to optimize the maintenance plan and to minimize the system availability. The findings show that the framework strongly mitigates the issues related to the classical RCM procedure, notably the high subjectivity of experts. It lays the groundwork for a general fuzzy-based reliability-centered maintenance method.
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| 5. |
- Capriglione, D., et al.
(författare)
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Analysis of MEMS devices under temperature stress test
- 2021
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Ingår i: 2021 IEEE International Workshop on Metrology for AeroSpace, MetroAeroSpace 2021 - Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728175560 ; , s. 63-68
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Konferensbidrag (refereegranskat)abstract
- The current technological process has mainly interested in integrating MEMS devices in most technological devices to offer complete control and awareness about a particular process or system. Such devices, which in most cases include gyroscope, accelerometer, and magnetometer, are fully integrated on a single chip and have a cost not higher than few dollars. Recently they have been more employed in embedded systems devoted to the autonomous driving operation for terrestrial and aeronautical vehicles. Such devices are often deployed to the market with datasheet reporting their characteristic without highlighting their behavior under particular environmental conditions. Most MEMS devices are mounted in a very harsh environment, characterized by high-temperature excursion and vibration from different sources. The authors propose a temperature stress test for such devices and evaluate their behavior under static conditions. Experimental results will evidence the accelerometer and gyroscope MEMS sensors' dependence on the temperature in a range of -10°C to 50°C. © 2021 IEEE.
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| 6. |
- Capriglione, D., et al.
(författare)
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Characterization of inertial measurement units under environmental stress screening
- 2020
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Ingår i: Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728144603
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Konferensbidrag (refereegranskat)abstract
- Nowadays, the Micro Electro-Mechanical Systems (MEMS) are widely employed in both consumer and industrial applications. One of the most important fields adopting MEMS device is the inertial measurement sector where this kind of technology is employed to produce Inertial Measurement Unit (IMU) that are typically composed by a triaxial accelerometer, a triaxial gyroscope, and a triaxial magnetometer. The growth of the MEMS is due to their small dimension and cost, challenges that enable their use in several applications belonging from Industry 4.0 to automotive and aerospace. However, all these sectors have in common operating conditions characterized by wide temperatures range and vibrations of different nature. In this framework, both the scientific and technical literature seems lacks suitable measurement procedures to be applied for testing the reliability of such kind of devices under environmental stress. So, this paper proposes a test procedure for Environmental Stress Screening (ESS) to determine any mechanical and electrical weakness or early degradation in a MEMS-based inertial measurement unit, when subjected to mechanical vibration and thermal cycling temperature tests. © 2020 IEEE.
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| 7. |
- Capriglione, D., et al.
(författare)
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Development of a test plan and a testbed for performance analysis of MEMS-based IMUs under vibration conditions
- 2020
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Ingår i: Measurement. - : Elsevier B.V.. - 0263-2241 .- 1873-412X. ; 158
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Tidskriftsartikel (refereegranskat)abstract
- Micro-Electro-Mechanical Systems (MEMS) are today widespread in many industrial and consumer applications. In the field of terrestrial transportation, cellular, wearable devices, robotics, drone, to cite a few, MEMS-based Inertial Measurement Units (IMUs) are widely employed for assuring several tasks as for the object tracking, self-driving vehicles, human motion and so on. Expected performance of such systems and also recent literature and technical standards miss considering both a context-awareness reliability analysis and metrological performance analyses of MEMS-based IMUs when operating in real scenarios characterized by the presence of significant temperature excursions, humidity, vibrations, mechanical shocks and so on. In particular, standard procedures to be applied for testing MEMS-based IMUs are not still available. Trying to fill these needs, this paper proposes both a suitable testbed and test plans for performance analysis of such kinds of devices under vibration conditions. The application to a real IMUs has confirmed that the proposed tests allow identifying the effects of mechanical stress on both the reliability and metrological performance of such devices. These results could be useful also for the international committees involved in the definition of technical standards to be adopted for testing these kinds of devices. © 2020 Elsevier Ltd
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| 8. |
- Capriglione, D., et al.
(författare)
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Experimental Analysis of Filtering Algorithms for IMU-Based Applications under Vibrations
- 2021
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Ingår i: IEEE Transactions on Instrumentation and Measurement. - : Institute of Electrical and Electronics Engineers Inc.. - 0018-9456 .- 1557-9662. ; 70
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Tidskriftsartikel (refereegranskat)abstract
- The use of microelectro-mechanical systems (MEMS)-based inertial measurement units (IMUs) is widespread in many applications concerning monitoring, diagnostic, and/or controlling in navigation and transportation systems, as well as in low-cost applications for automotive and aeronautical fields. The data provided by the set of sensors typically present in IMUs, as accelerometers, gyroscopes, and magnetometers, are often used also for feeding suitable filtering and positioning algorithms able to correct the attitude and path of the vehicle on which they are installed or to provide the analytical redundancy needed for online diagnosis. Nevertheless, on one hand, the performance of low-cost MEMS-based IMUs is certified only under a small set of nominal operating conditions, and on the other hand, the filtering algorithms are often designed and verified under canonical additive noises. In this framework, this article proposes a test plan and a test setup for analyzing and characterizing the performance of filtering algorithms for positioning based on data coming from low-cost IMUs and able to verify systematically the operation of such algorithms under real scenarios. Two kinds of very popular filtering algorithms have been considered, namely, the complementary filter and the attitude and heading reference systems (AHRS) Kalman filter, which belong to two opposite approaches. The experimental results prove how the typical vibrations present in real scenarios can significantly affect the performance of such algorithms. © 1963-2012 IEEE.
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| 9. |
- Capriglione, D., et al.
(författare)
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Vibration step test for performance analysis of inertial measurement unit
- 2020
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Ingår i: Proceedings. - : International Measurement Confederation (IMEKO). ; , s. 111-116
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Konferensbidrag (refereegranskat)abstract
- Nowadays Inertial Measurement Units are largely implemented in several applications, such as automotive and self-driving vehicles, Unmanned Aerial Vehicles, cellular phones, robotics, artificial intelligence and many others. Despite this, recent literature doesn't cover properly both the characterization of the dynamical metrological performances and the reliability analysis when microelectronic devices operate under real environmental conditions. Trying to fill this gap, the characterization of an Inertial Measurement Unit under vibration condition is proposed in this work by means of a step-test vibration profile to test the behavior of an inertial platform subjected to a sinusoidal vibration at different frequencies. Starting from the widely known sine sweep vibration profile, a customized test plan has been developed basing on a frequency step up of a sinusoidal stimulus over time to investigate the frequency response of the inertial platforms. The application to a set of real devices has confirmed that the proposed test allows identifying the effects of mechanical stress on the metrological performances of microelectromechanical sensors over a frequency domain. The developed test plan could also be used to investigate whether or not sinusoidal vibrations at certain frequencies trigger some failure mechanisms that are normally quiescent. © Global Trends in Testing, Diagnostics and Inspection for 2030.All rights reserved.
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| 10. |
- Catelani, M., et al.
(författare)
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Design and experimental analysis of temperature tests for inertial measurement units in avionic applications
- 2020
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Ingår i: Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728166360 ; , s. 217-221
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Konferensbidrag (refereegranskat)abstract
- Inertial Measurement Units (IMUs) are today widespread in several contexts as Unmanned Aerial Vehicle (UAV), navigation and transportation, automotive and selfdriving vehicles, cellular phones, human motion, and robotics, to cite a few. In most cases, Micro-Electro-Mechanical Systems (MEMS) are adopted for implementing IMUs, and these kinds of devices are often interested in extreme operating conditions when employed in aeronautical applications. Moreover, the measurement data collected by IMUs often feed algorithms involved in positioning systems and trim controlling strategies as well as for fault diagnosis purposes. As a consequence, it becomes essential to analyze the performance of such systems under all working conditions admissible by their nominal operating range.In this framework, the paper reports an experimental activity aimed at studying the effects of temperature variations on a very popular MEMS-based IMU for aircraft applications. In more detail, suitably designed and controlled temperature cycles (falling in the device under test nominal operating range) have been realized, and the achieved results have proved how the temperature excursions can significantly affect the measurements performed by all sensors involved (i.e., gyroscope, accelerometer, and magnetometer). © 2020 IEEE.
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