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Percorrer por autor "Marat-Mendes, Rosa"

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  • Design of an Underactuated USV Catamaran
    Publication . Assunção, Mário; Teodoro, Pedro; Marat-Mendes, Rosa; Franco, Victor
    The Sea2Future program was developed at ENIDH, since 2018, and it has involved the construction of an unmanned surface vehicle (USV) with the participation of students and teachers of this educational institution. This firstUSV, with two hulls, referred to as USV-enautica1, included a control system which allows it to carry out several functions autonomously and it was used to study the composite construction, the propulsion command and control architectures, the navigation algorithms, and the control systems. The challenge of designing a lightweight hull suitable for coastal and open ocean navigation is described and the implemented solution for the microcontroller and software operation, the sensors, the navigation, and the control systems are explained. The USV has successfully demonstrated its ability to be operated remotely, which is necessary to validate the hydrodynamic parameters, and afterwards the aim of autonomous operation.
    2022Atas de conferência Acesso restrito Ver mais
  • Design, manufacturing & analysis of an ABS differential gear system model
    Publication . Alcácer, Vítor; Ávila, Francisco; Marat-Mendes, Rosa
    This work presents the assessment of Von Mises stresses in straight-tooth bevel differential gear system of a pedagogical model. This model was designed and the straight-tooth gears were formed using a 3D printing rapid prototyping. Two different percentages of densities (60% and 100%) of printed gears with ABS (Acrylonitrile butadiene styrene) were analysed and compared. Von Mises stresses in the teeth of the gears were obtained using finite element analysis (FEA) with PTC Creo Parametric 2.0. Results showed that the manufactured gears by the method of 60% of ABS density are capable to withstand the applied forces, i.e. the allowable stress of the material is not achieved.
    2015-07Documento de conferência Acesso aberto Ver mais
  • Manufacturing Calcium Phosphates Scaffolds Using 3D Printed Lost Molds
    Publication . Albardeiro, Miguel; Sousa, Adriana; Guedes, Mafalda; Marat-Mendes, Rosa; Pina, Célia; Figueiredo, Lígia; Ascenso, Eduardo; Baptista, Ricardo
    2022-07Atas de conferência Acesso aberto Ver mais