Desenvolvimento de atuadores flexíveis com elastômeros dielétricos constrito por fibras com sensores de fibra óptica integrados
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Data
2025-10-09
Autores
Silva, Alexandre Bernardo Santos da
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Universidade Federal do Espírito Santo
Resumo
Advances in motor rehabilitation have driven the development of technologies capable of interacting with the human body. In this context, exible actuators emerge as a promising alternative to rigid actuators, as they more closely resemble the behavior of natural muscles, enabling their application in wearable robotic joints for rehabilitation. This work presents the development of ber-constrained dielectric elastomer actuators (FCDEAs). Initially, static tests were conducted to evaluate the inuence of parameters such as pre-stretch, dimensions, and mechanical load on displacement and deformation. Subsequently, an optical ber in a serpentine con guration was embedded within the FCDEA, correlating optical power loss with displacement measured through image tracking techniques. A total of 36 tests were performed under varying geometric and mechanical conditions, along with oscillatory tests at di erent excitation ranges (0˘5V ;100mHz) and frequency-domain analyses using chirp signals and Bode diagrams. The results indicate that the developed actuators are capable of achieving 90% deformation, and the optical ber proves e ective for displacement measurement at low frequencies, showing good correlation between optical power and deformation, particularly at higher excitation amplitudes. Despite the limitations observed in static tests and the reduced accuracy of 69% in the Bode diagram, the dynamic analysis demonstrated the feasibility of the proposed approach for future applications in actuators and closed-loop control sensing systems.
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Elastômeros dielétricos , Sensores de fibra óptica , Músculos artificiais