EST - Artigos de Periódicos

URI permanente para esta coleçãohttps://ri.uea.edu.br/handle/riuea/4779

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Análise de eficiência energética de um módulo fotovoltaico com rastreador solar comparado a um módulo fixo
(Universidade do Estado do Amazonas, 2021-07-29) Ramos, Mateus de Azevedo; Bastos, Moisés Pereira; Mazaira Morales, Israel; Faria, Marlene Araújo de; Araújo, Rodrigo Farias
Solar energy has been constantly growing in recent years as an alternative to traditional energy generation. Studies have been carried out around the world to improve assembly techniques for solar energy generation systems, increasing the efficiency of photovoltaic modules, in order to guarantee the maximum generation of the plates. The efficiency of the modules was the basis of this research, using a module together with a solar tracker, checking if there is an improvement in the efficiency of the photovoltaic module and comparing with the efficiency of a fixed module. The tracker was assembled with wooden parts, pipes and an MDF base. The movements performed by the structure were made possible by means of two servomotors, one arranged to ensure movement in the azimutal axis and the other in the altitude axis. So that we could control the movements and read the quantities generated by the modules, we used two Arduino UNO prototyping modules and INA219 current, power and voltage sensors. An interface was developed in the Processing software to allow real-time supervision of the efficiencies of both modules. In addition, the interface allowed the user to perform manual control over the structure's movements, which could also move automatically. The automatic mode of operation was possible thanks to the use of photoresistive sensors, LDRs, which are able to change their resistivity when there is light incidence. In order for the interface to control the movements of the servos and interpret the readings of the photoresistive sensors, we used the Firmata library in one of the Arduino used. As a result, in one of the days analyzed, we obtained an improvement of 2.2% in the efficiency of the module coupled to the tracker, this result could have been better if we had used nominally more efficient panels, but even so, there was proof of efficiency gain.
Desenvolvimento de um robô móvel do tipo Car-Like para realização de caminhos pré-definidos
(Universidade do Estado do Amazonas, 2024-02-27) Seixas, João Aristeu Cardoso; Araújo, Rodrigo Farias; Bessa, Iury Valente de; Queiroz, Luiz Alberto; Gadelha, Vitor Fernando de Souza
The development of Car-Like mobile robots encompasses the creation of autonomous vehicles that emulate the motion of conventional cars. Although the applications for such robots are diverse, this work focuses on the challenge of path following. The goal is to position the robot near an initial point on a path defined by a time-independent function, f(x). Through lateral control, the intention is for the robot to align itself with the path and follow it. The development of the controller to stabilize the robot on the path will adopt an approach using Linear Matrix Inequalities (LMI). Additionally, the project aims to develop both the hardware and software for a scaled-down prototype of a Car-Like mobile robot. Regarding the hardware, the process involves 3D modeling using CAD software, 3D printing of parts, and the design and manufacturing of a printed circuit board to capture sensors data and activate the system’s actuators. In the realm of software, the controller’s implementation will be on a computer with the Robot Operating System (ROS). Consequently, the microcontroller installed on the robot will be responsible only for communication with the computer via TCP/IP, sensors readings and actuators commands.
Robô móvel aspirador autônomo para ambientes domésticos
(Universidade do Estado do Amazonas, 2021-12-20) Marques, Kathrian de França; Bastos, Moisés Pereira; Bastos, Moises Pereira; Kimura Junior , Almir; Mazaira Morales, Israel; Araújo, Rodrigo Farias; Leal, Cleto Cavalcante de Souza
Based on the areas of home automation and mobile robotics, this project presents a technological solution to help clean the floor in residential environments. Analyzing daily life at home, there is a need to automate repetitive and tiring tasks, aiming to optimize the use of time spent and, consequently, increase the comfort of users. This project aimed to model and develop a prototype of a mobile robot to be designed to vacuum solid dirt and dust on the floor of domestic environments. Additive manufacturing was proposed in the construction of mechanical parts of the robot chassis, to integrate with the electronic sensing and control systems. The processing and control system was carried out by the Arduino platform, which provides hardware and free software solutions for prototyping automation systems accessible at low cost. The applicability of the robot is restricted to domestic environments with flat horizontal dry floors. At the end of the project, the result was a functional prototype of a mobile robot capable of suctioning dirt and dust from the floor and moving with certain autonomy in a simple domestic environment. The robot is designed to avoid obstacles, walls and steps.