P.B.S.:
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Citações na Scopus
Tipo de produção
Trabalho de Conclusão de Curso
Data
2024-06-05
Autores
Silva, Jonathan Rosa Pereira da
Zanatta, Leonardo Mattosinho
Souza, Levi Cardoso de
Machado, Lucas Gabriel Vieira
Valadares, Lucca Romero
Bianchim, Luiz Felipe Sousa
Santos, Marcelo Pereira dos
Zanatta, Leonardo Mattosinho
Souza, Levi Cardoso de
Machado, Lucas Gabriel Vieira
Valadares, Lucca Romero
Bianchim, Luiz Felipe Sousa
Santos, Marcelo Pereira dos
Orientador
Souza, Jairo de Lima
Periódico
Título da Revista
ISSN da Revista
Título de Volume
Citação
Texto completo (DOI)
Palavras-chave
sistema de freios,veículos autônomo
,frenagem autônoma,pastilha de freio,controle mecânico,braking system,autonomous vehicle,autonomous braking,brake pad,mechanical control
Resumo
Os carros são o principal tipo de veículo de transporte no Brasil, tendo a quantidade emplacamentos cada vez maiores a cada ano. Atualmente, existe um grande plano mundial para que os veículos cada vez se tornem mais autônomos e mais seguros. O principal sistema que garante essa segurança é o sistema de freios, apesar de ser um dos focos das montadoras garantir que esse sistema funcione perfeitamente, ainda existe alguns fatores incontroláveis que geram acidentes, principalmente a falha de garantir a distância segura e a distração do motorista. Em vista isso, as montadoras começaram a investir em tecnologia autônomas que evitam a falha humana, como o controle de cruzeiro e o sistema de frenagem autônoma. Mas apesar desses sistemas ajudaram bastante na redução de acidentes se tornando em muitos países e futuramente até no Brasil, tecnologias obrigatórias, não são perfeitos. E começa a ser verificado falhas mecânicas não detectadas por esse sistema, como empenamento, temperatura, pastilha desgastada e além de outros fatores externos que não mensurados como pavimento e chuva. Mas analisando o mercado é visto uma oportunidade de avaliar projetos para melhoria do sistema de frenagem autônoma, visto que será obrigatório nos próximos anos, e apenas funciona em metade dos casos. Assim analisando alguns comportamentos do sistema em softwares de cálculo matemático, visualizou-se que um dos fatores que mais altera a distância segura de frenagem é a temperatura entre o disco de freio e a pastilha, mudando consideravelmente o atrito da frenagem. Assim foi desenvolvido por meio de cálculos e diagramas de blocos, algumas soluções para o monitoramento do atrito da pastilha-disco e atuação do sistema com essa leitura. Com o método desenvolvido, foi possível criar o projeto P.B.S visando por meio de cálculos complexos e realimentação de estados, prever a distância segura que os veículos irão frear e assim mudar a distância de frenagem para uma maior ainda.
Cars are the main type of transport vehicle in Brazil, with the number of registrations increasing every year. Currently, there is a major global plan for vehicles to become more autonomous and safer. The main system that guarantees this safety is the braking system, despite being one of the focus of car manufacturers to ensure that this system works perfectly, there are still some uncontrollable factors that generate accidents, mainly the failure to guarantee a safe distance and driver distraction. In view of this, automakers began to invest in autonomous technology that avoids human error, such as cruise control and autonomous braking systems. But although these systems have helped a lot in reducing accidents, they are becoming mandatory technologies in many countries, and even in Brazil in the future, they are not perfect. And mechanical failures not detected by this system begin to be verified, such as warping, temperature, worn pads and other external factors that are not measured, such as pavement and rain. But analyzing the market, we see an opportunity to evaluate projects to improve the autonomous braking system, as it will be mandatory in the coming years, and only works in half of the cases. Thus, analyzing some system behaviors in mathematical calculation software, it was seen that one of the factors that most alters the safe braking distance is the temperature between the brake disc and the pad, considerably changing the braking friction. Thus, through calculations and block diagrams, some solutions were developed for monitoring pad-disc friction and system performance based on this reading. With the method developed, it was possible to create the P.B.S project aiming, through complex calculations and state feedback, to predict the safe distance that vehicles will brake and thus change the braking distance to an even greater one.
Cars are the main type of transport vehicle in Brazil, with the number of registrations increasing every year. Currently, there is a major global plan for vehicles to become more autonomous and safer. The main system that guarantees this safety is the braking system, despite being one of the focus of car manufacturers to ensure that this system works perfectly, there are still some uncontrollable factors that generate accidents, mainly the failure to guarantee a safe distance and driver distraction. In view of this, automakers began to invest in autonomous technology that avoids human error, such as cruise control and autonomous braking systems. But although these systems have helped a lot in reducing accidents, they are becoming mandatory technologies in many countries, and even in Brazil in the future, they are not perfect. And mechanical failures not detected by this system begin to be verified, such as warping, temperature, worn pads and other external factors that are not measured, such as pavement and rain. But analyzing the market, we see an opportunity to evaluate projects to improve the autonomous braking system, as it will be mandatory in the coming years, and only works in half of the cases. Thus, analyzing some system behaviors in mathematical calculation software, it was seen that one of the factors that most alters the safe braking distance is the temperature between the brake disc and the pad, considerably changing the braking friction. Thus, through calculations and block diagrams, some solutions were developed for monitoring pad-disc friction and system performance based on this reading. With the method developed, it was possible to create the P.B.S project aiming, through complex calculations and state feedback, to predict the safe distance that vehicles will brake and thus change the braking distance to an even greater one.