Browsing by Keyword "Accuracy"
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Item Cable-driven parallel robot for curtain wall module installation(2022-06) Iturralde, K.; Feucht, M.; Illner, D.; Hu, R.; Pan, W.; Linner, T.; Bock, T.; Eskudero, I.; Rodriguez, M.; Gorrotxategi, J.; Izard, J.B.; Astudillo, J.; Cavalcanti Santos, J.; Gouttefarde, M.; Fabritius, M.; Martin, C.; Henninge, T.; Nornes, S.M.; Jacobsen, Y.; Pracucci, A.; Cañada, J.; Jimenez-Vicaria, J.D.; Alonso, R.; Elia, L.; Normes, S. M.; DIGITALIZACIÓN Y AUTOMATIZACIÓN DE LA CONSTRUCCIÓN; ROBOTICA_AUTOMA; Tecnalia Research & InnovationA cable-driven parallel robot (CDPR) was developed for the installation of curtain wall modules (CWM). The research addressed the question of whether the CDPR was capable installing CWMs with sufficient accuracy while being competitive compared to conventional manual methods. In order to develop and test such a system, a conceptual framework that consisted of three sub-systems was defined. The tests, carried out in two close-to-real demonstration buildings, revealed an absolute accuracy of the CWM installation of 4 to 23 mm. The working time for installing a CWM was reduced to 0.51 h. The results also show that the system is competitive for a workspace greater than 96 m2 compared to conventional manual methods. However, improvements such as reducing the hours for setting up the CDPR on the one hand and achieving a faster and more robust MEE on the other hand will be still necessary in the future.Item New light and highly-damped bonded structures for noise and vibration reduction(2004) Zatarain, M.; Villasante, C.; Sedano, A.; Bueno, R.; Tecnalia Research & InnovationThe current trend with machine tool structures is the reduction of weight of their moving parts. The present paper looks at a method for achieving this, namely that of bonding rigid materials, whether or not of metal. Special emphasis is laid on achieving structures with a high damping ratio. The method makes it possible to combine materials and thicknesses, and produce closed, ribbed sections. To assess the behaviour of these structures it was necessary to develop a tool that adds to the features of a finite-element system. With this tool it is possible to assess not only rigidity and mass, but also damping. Various glues were tested, so that those providing optimum rigidity and damping may be used. The prototypes demonstrate the validity of the technology of bonding and of the method of verification.Item Thermal analysis of a BIPV system by various modelling approaches(2017-10) Assoa, Ya Brigitte; Mongibello, Luigi; Carr, Anna; Kubicek, Bernhard; Machado, Maider; Merten, Jens; Misara, Siwanand; Roca, Francesco; Sprenger, Wendelin; Wagner, Martin; Zamini, Shokufeh; Baenas, Tomás; Malbranche, Philippe; Tecnalia Research & InnovationThis work presents various models developed and implemented within the SOPHIA European project in order to thermally characterize PV modules in a rooftop BIPV configuration. Different approaches have been considered, including a linear model, lumped elements models and models that make use of commercial software solvers. The validation of the models performed by comparing the results of simulations with experimental data recorded on a test bench over an entire year is presented and discussed on a seasonal basis. The results have shown that all the models implemented allow achieving a good prediction of the PV modules back surface temperature, with the minimum value of the coefficient of determination R2 around 95% on a yearly basis. Moreover, the influence of season weather conditions and of the incident solar irradiance magnitude on the accuracy of the considered thermal models is highlighted. The major result of the present study is represented by the fact that it has been possible to perform a better thermal characterization of the BIPV module by tuning some of the heat transfer coefficients, such as those relative to the effects of the wind velocity, and to the evaluation of sky temperature.