For years, plants have tried to adapt to the environmental changes caused by time, improving and developing their biological structures. Many of these structural and functional properties of plants have great potential for the development of concepts in the field of biomimetics. Recent previous studies have shown that the movement of Mimosa pudica L. is caused by the variation of turgor pressure within the cells of organs motor, that is, the influx and efflux of water by osmosis, generating reversible changes in the shape of the plant. Thus, this article sought, through research and literature references, to carry out a survey of studies related to the seismonastic movements of the plant and its applications in the design of technological innovations. In addition, it presents the development of a pneumatic actuator based on the abstraction of the morphology of the primary pulvinus of the plant and the concept of bioinspired design of the theoretical model based on the technology of soft robots. As a result, the bioinspired actuator model of the plant movement is described. In addition, with a simulation, it was possible to observe that the flexible modules are capable of generating the proposed movement and allow movement of the actuator. With the study, it was possible to understand that the movement of the plant appears as an embryo for the projection of technologies, and that the proposed study appears as the basis for research with pneumatic actuators.
Purpose With recent advances in the field of 3D printing, new prosthetic features have been developed to provide accessibility to patients. However, the mechanisms employed for its performance still need to be better explored. In this article, a study is proposed on the angular variation between the joints of a human finger and a design solution based on soft robotics, in order to guide studies on prosthetic solutions. Methods A literature review was carried out on the applications of pneumatic actuators of soft robotics for the development of hand prostheses. As part of the theoretical aspects, the application of bending actuators that employ the dynamics of the movement of the legs of arachnids was also studied, in order to propose an application in the model. Finally, the angular variation was analyzed during the closing process of the right hand in order to apply the study in the construction of the prosthesis. Results Despite the complexity of moving human fingers, it is possible to develop a prosthetic mechanism that integrates the capabilities of soft actuators and 3D-printed materials. In addition, the angulations of the joints of the index finger vary differently under the same impulse. Conclusion Using the spider's movement mechanism, it is possible to develop a pneumatic actuator integrated with the rigid structures of the printed finger. In addition, the angular variation of the joints of the index finger changes differently under the same stimulus, which allows the application of soft robotics as a resource to mimic human movement.
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