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- Design, control, and testing of a multifunctional soft robotic GripperPublication . 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.
- Electro-pneumatic control of soft robotic hand prosthesis actuatorsPublication . D`Almeida, Hugo; Almeida, Paulo; Charters De Azevedo, Tiago; Gonçalves Cavaco Mendes, Mário JoséThis project arises in response to some limitations of the current conventional prostheses, namely aesthetic, mechanical and cost, that fail to fulfil the needs of its users, for example with soft objects. The results obtained until now proved to be satisfactory in the approximation of the hand morphology, low cost and the designed mechanical properties. However, this paper aims to present a developed electro-pneumatic control board to control the soft robotic prosthesis of the human hand. The first tests done with this control board show that it will be necessary to improve the physical design and the 3D printing of the soft actuators (fingers) due to some leaks in the printed actuators.
- Soft robotic hand prosthesis using reverse engineering and fast prototypingPublication . Almeida, Hugo; Charters De Azevedo, Tiago; Almeida, Paulo; Gonçalves Cavaco Mendes, Mário JoséThe present work aimed to develop a soft robotic prosthesis of the human hand using reverse engineering and fast prototyping. This project arises in response to some limitations of the current conventional prostheses, namely aesthetic, mechanical and cost, that fail to fulfil the needs of its users, for example with soft objects. The hand prosthesis design involved the acquisition and processing of a medical image of the user's hand, followed by a modelling process which proved to be highly complex, and finally the obtainment of a real model (by 3D printing) of the prosthesis. The results obtained proved to be satisfactory in the approximation of the hand morphology, low cost and the designed mechanical properties. However, due to some technological limitations (the used 3D printers), and more specifically in the physical conception of the model, its functionality is yet to be proved with the pneumatic control.