Repository logo

Browsing by Author "Correia, A."

Now showing 1 - 2 of 2
  • Design, control, and testing of a multifunctional soft robotic Gripper
    Publication . Correia, A.; Charters De Azevedo, Tiago; Leite, Afonso; Campos, Francisco M.; Monge, Nuno; Rocha, André; Mendes, Mário J. G. C.
    This paper proposes a multifunctional soft robotic gripper for a Dobot robot to handle sensitive products. The gripper is based on pneumatic network (PneuNet) bending actuators. In this study, two different models of PneuNet actuators have been studied, designed, simulated, experimentally tested, and validated using two different techniques (3D printing and molding) and three different materials: FilaFlex 60A (3D-printed), Elastosil M4601, and Dragonskin Fast 10 silicones (with molds). A new soft gripper design for the Dobot robot is presented, and a new design/production approach with molds is proposed to obtain the gripper’s PneuNet multifunctional actuators. It also describes a new control approach that is used to control the PneuNet actuators and gripper function, using compressed air generated by a small compressor/air pump, a pressure sensor, a mini valve, etc., and executing on a low-cost controller board—Arduino UNO. This paper presents the main simulation and experimental results of this research study.
    2024-11-25Journal article Open access Show more
  • New SST optical sensor of Pampilhosa da Serra – studies on image processing algorithms and multi-filter characterization of space debris
    Publication . Coelho, Bruno; Barbosa, Domingos; Bergano, Miguel; Correia, A.; Freitas, José; Marques, Paulo; Pandeirada, João; Ribeiro, Valerio
    As part of the Portuguese Space Surveillance & Tracking (SST) System, two new Wide Field of View (2.3ºx2.3º) small aperture (30cm) telescopes will be deployed in 2021, at the Pampilhosa da Serra Space Observatory (PASO), located in the center of the continental Por tuguese territory, in the heart of a certified Dark Sky area. These optical systems will provide added value ca pabilities to the Portuguese SST network, complement ing the optical telescopes currently in commissioning in Madeira and Azores. These telescopes are optimized for GEO and MEO survey operations and besides the required SST operational capability, they will also pro vide an important development component to the Por tuguese SST network. The telescopes will be equipped with filter wheels, being able to perform observations in several optical bands including white light, BVRI bands and narrow band filters such as H(alpha) and O[III] to study potential different object’s albedos. This config uration enables us to conduct a study on space debris classification/characterization using combinations of dif ferent colors aiming the production of improved color in dex schemes to be incorporated in the automatic pipelines for classification of space debris. This optical sensor will also be used to conduct studies on image processing algo rithms, including source extraction and classification so lutions through the application of machine learning tech niques. Since SST dedicated telescopes produce a large quantity of data per observation night, fast, efficient and automatic image processing techniques are mandatory. A platform like this one, dedicated to the development of Space Surveillance studies, will add a critical capability to keep the Portuguese SST network updated, and as a consequence it may provide useful developments to the European SST network as well.
    2021-05Conference object Open access Show more