In this paper, a low-cost chipless reader for detecting depolarizing tags is described. The reader operates in the frequency band (2-2.5) GHz, and it is compact and integrated in a single board. The reader architecture and its transmitting and receiving antennas are presented.
Reader antennas comprise two orthogonally placed, E-shaped patches with a decoupling below -35 dB. The reader performance is evaluated on a four-bit tag formed by four obliquely placed dipoles on top of a metallic ground plane. The reader is based on a frequency domain approach, is integrated in a single board, and its cost for a volume of 1k pieces is around $120.
Karim Abu Salem, Marco Carini, Marco Maganzi, Michael Méheut, Stylianos Kanellopulos, Vincenzo Binante, Vittorio Cipolla
2019
Cubit, Università di Pisa
Abstract
The paper presents the phases and achievements of aerodynamic design activities carried out on a box-wing aircraft called PrandtlPlane, proposed as a sustainable solution for meeting the demanding requirements of fast-growing air transport. The activities are included in the PARSIFAL project ("Prandtlplane ARchitecture for the Sustainable Improvement of Future AirpLanes"), funded by the European Union under the Horizon2020 Program.
Starting from the conceptual aerodynamic design of the PrandtlPlane architecture, the paper follows the development of the aerodynamic design, dealing with the preliminary definition of a reference configuration, whose performances have been evaluated with both low and high fidelity tools, and the optimization procedure for the improvement of cruise performance.
The PrandtlPlane is a box-wing aircraft based on Prandtl's studies on multiplane lifting systems. A box-wing designed according to the Prandtl "best wing system" minimizes the induced drag for given lift and span, and thus has the potential to reduce fuel consumption and noxious emissions.
Conference/Journal: EUCASS 2019 (European Conference for Aeronautics and Space Sciences), Madrid
In the last years, thanks to the development of computational capabilities, the CAE methodology has become an essential tool in the design especially in the preliminary phase and configuration analysis. This happens also and above all in the fluid dynamic design by using CFD codes, which have reached high levels of reliability. In recent years the simulation times have significantly reduced and this means that the preprocessing phase has become the real bottleneck within the project. The engineering consulting companies can face trouble to define standard methodologies for the analysis, because of the wide range of application fields, and need to reduce operational costs and response times to be competitive. This kind of problems induce us to find a strategy to automate the entire design process as much as possible. This work aims at showing the use of ANSA tools for our cases, and the development of preprocessing automation methods easily adaptable to most of them.
Authors: Dr. Marco Maganzi (University of Pisa, CubitLab), Giovanni Lombardi (University of Pisa), Antonio Ercoli (University of Pisa)
Antonio Ercoli, Giacomo De Angeli, Giovanni Lombardi, Marco Maganzi
2019
Cubit, Maserati, Università di Pisa
Abstract
In automotive design, the study of the water thin layer over a car due to rain is becoming increasingly important: the challenge is to obtain a way to describe the behavior of the water over a vehicle in rainy conditions and its interactions with wipers and drainage systems, to determine potential failures of the vehicle design.
In this paper two similar numeric procedures have been realized with the software STAR CCM+ to analyze the dynamic of water thin layer starting from the impingement of the rain on the car surface and taking into account even the motion of the wipers over the windshield. Moreover, the water that flows through the drainage systems is monitored to figure out if the water could produce a malfunction of components near them.
In order to describe each status of the water, many multiphase models are used. These methodologies have been applied on a commercial vehicle model and the results have been examined and compared to each other. The analysis shows a better description of the reality for one of them, leading to the possibility of using it as a design tool in the automotive industry.
Conference/Journal: International Journal of Automotive Technology, Vol. 20, pp. 1123-1129 (2019)
