Análise de conforto relacionado à vibração em veículos de passeio

Abstract

One of the most relevant characteristics when buying a new car is the comfort provided by the vehicle. Comfort is how well the occupant feels in the automobile, being a sensation that varies from person to person. Various components of the automobile influence the physical and visual perception of comfort experienced by passengers. One of the most important aspects of physical comfort is the vehicle’s vibration absorption. ISO 2631-1 establishes occupational vibration comfort limits for the torso, hands, and arms. This study aims to develop a metric to evaluate the vibrational comfort of passenger vehicles, assisting the buyer in acquiring a new car. The study begins with the selection of automobiles that will be used in the tests, followed by the definition of the routes that will be traveled, the execution of tests using an accelerometer, and the establishment of a vibrational comfort scale. The tests were conducted with an accelerometer positioned on the driver’s seat. The trials take place with the vehicle stationary, to analyze the influence of the engine on vibration. Then, tests are conducted on a road that induces high vibrations, exploring the vehicle's vibration limits and enabling the detection of possible mechanical issues. Another test is performed on a route with highly regular asphalt, serving as a counterpoint to the previous test. Finally, a route simulating the driver’s daily routine is used, combining the characteristics of both low and high-vibration tests. Thus, with the results in hand, it became possible to evaluate mechanical failures in some of the vehicles. In addition to performance comparisons between each vehicle, it was also possible to determine which automobile is the best in terms of vibrational comfort.