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This paper presents the results of an experimental modal analysis performed on a prototype chassis of an off-road competition vehicle. The vehicle was designed by the Mini Baja EESC-USP team for the annual competition promoted by SAE Brasil. The goal of this experimental modal analysis is to validate a finite element model of the chassis, in order to develop a flexible multibody dynamic model of the complete vehicle. A preliminary finite element modal analysis of the test article was carried out in a free-free boundary condition. A random signal was used for FRFs acquisition. A multimode identification algorithm was used to acquire the system's modal parameters. Based on this information a swept sine was employed for mode shapes identification.

In the automotive area, mobile robot theory with artificial intelligence had demonstrated an incredible potential and interest of several researchers that are involved on the issue of board intelligent systems on passenger cars to perform daily jobs as, navigation without collision, control vehicle speed, parking, etc. This paper will present a path planner using a neural controller trained based on potential fields, in order to determine the trajectory and a fuzzy controller to determine the differential robot kinematics for the parallel parking maneuver task. A simulator presents the neural network training and the fuzzy logic application, from any initial point. The trajectory results can be compared with the theory and the vehicle kinematics can be verified through the simulator.

The purpose of this paper is to experimentally analyze structural-borne contributions of noise, vibration and harshness during tire rolling, also called Road NVH, in a passenger vehicle using energy transfer path analysis method (TPA), applied in a case study. During the investigation, the influences of the accelerations and forces through the A-arm front suspension bushings are highlighted due their contribution to the estimated overall interior noise, which is correlated to measured overall interior noise. The structural contribution begins as a direct result of tire vibration from surface interactions. These mechanical vibrations, mainly below 450 Hz, are transmitted to all chassis and body subsystems, resulting into noise and vibration perceived by the passengers in the cabin interior. This study is motivated by improvements in Powertrain NVH and Wind Noise, which unbalance Road NVH on various conditions.