https://repositorio.ufu.br/handle/123456789/19216 2026-08-14T05:40:23Z 2026-08-14T05:40:23Z https://repositorio.ufu.br/handle/123456789/49489 2026-08-13T06:28:58Z 2026-06-15T00:00:00Z

Title: Desenvolvimento de uma bancada didática para estudo de vibrações de sistemas mecânicos Abstract: This work presents the development of a modular educational test bench designed for the study of vibrations in mechanical systems with up to four degrees of freedom.The project involved theoretical modeling using the Lagrange method, the physical construction of the structure, and the execution of experimental tests using modal analysis based on Frequency Response Functions (FRFs). From the experimental data, the system's natural frequencies and their respective mode shapes were identified. Subsequently, an analytical model calibrated by numerical optimization techniques was developed, allowing for the acquisition of parameters consistent with the observed physical behavior. Furthermore, a numerical simulation was performed via the finite element method in ANSYS; the resulting natural frequencies presented higher values, as expected due to computational model idealizations, yet the vibration modes coincided with the other methods. Finally, the comparison between experimental, analytical, and numerical results demonstrated strong agreement in identifying natural frequencies and, most notably, in the representation of mode shapes, evidencing physical coherence among the methods. The observed discrepancies remained within acceptable limits, validating the reliability of the adopted models. Thus, it is concluded that the developed test rig proves to be an effective tool for teaching and analyzing mechanical vibrations, enabling the integration of theory, simulation, and experimental practice.

2026-06-15T00:00:00Z https://repositorio.ufu.br/handle/123456789/49026 2026-07-24T06:19:32Z 2026-03-11T00:00:00Z

Title: Construção e controle de um posicionador linear utilizando realimentação de estados

2026-03-11T00:00:00Z https://repositorio.ufu.br/handle/123456789/49000 2026-07-24T06:20:00Z 2026-06-22T00:00:00Z

Title: Implementação de um sistema de comando de pulsos para um robô Delta

2026-06-22T00:00:00Z https://repositorio.ufu.br/handle/123456789/47964 2026-01-06T06:19:55Z 2025-12-01T00:00:00Z

Title: Inovação sustentável: sistema de quebra de coco com solução mecânica segura e ergonômica utilizando materiais reaproveitados Abstract: This work presents the development of a babassu coconut cutting machine aimed at improving the working conditions of coconut breakers, an activity traditionally characterized by high physical effort and accident risk. The project was conceived based on the principles of mechanical engineering, ergonomics, and sustainability, using recycled materials easily found in local workshops and scrapyards, such as automotive and metallic components, to ensure low cost and community replicability. The mechanical system of the machine consists of a rack-and-pinion mechanism coupled to an automotive steering sector, which converts the rotary motion of the lever into a linear displacement of the cutting blade, significantly reducing the operator’s physical effort. Poka-Yoke safety systems and adaptations to NR-12 and NR-17 standards were implemented to ensure safe and ergonomic operation. Performance tests indicated that the equipment can cut each fruit in approximately 10 seconds, representing a productivity increase of up to 85% compared to the manual method, while also providing greater comfort and operational safety. It is concluded that the developed prototype is technically viable, sustainable, and socially relevant, contributing to the enhancement of the babassu extractivist communities’ work and the modernization of the babassu production chain.

2025-12-01T00:00:00Z