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  • Pozycja
    Bionic hand control using EMG signals
    (Wydawnictwo Politechniki Łódzkiej, 2021) Sencerek, Jędrzej; Zagrodny, Bartłomiej
    Abstract. 3D printed prototype a human hand which is controled by sEMG signal was created to simulate two types of fingers motions. The first one includes fingers flexion/extension and the second one is focused on opposing the thumb. These two types of motions are executed by one pair of biological muscles, by the meaning of sEMG signals. The recruting electrodes are attached to both biceps brachii. One of them is responsible for fingers flexion/thumb abduction, and the other is for fingers extension/thumb adduction. The simultaneous contraction of both muscles couses a change in the mode of movement ( fingers - thumb). Control is based on the Arduino microcontroller extended by two EMG Olimex shields and two servos. The main idea behind this project was to create an easy and cheap alternative to commercial prosthetic solutions.
  • Pozycja
    Evaluation of 3D printed aerofoil models for wind tunnel testing.
    (Stowarzyszenie Inżynierów i Techników Mechaników Polskich, 2014) Olasek, Krzysztof; Wiklak, Piotr
    Preparation of an appropriate model to conduct experiments is a crucial aspect of every science investigation. Usually, apart from the requirement to achieve a desired level of a model quality, it is also very important to keep in mind the costs and time of its manufacturing. The following paper provides an overview of various 3D printing techniques. Four models of a standard NACA0018 aerofoil were manufactured in different 3D printing methods. Various parameters of the models have been included in the analysis: surface roughness, dimension tolerance, strength, details quality, surface imperfections and irregularities as well as thermal properties.