Dynamic Characteristics Analysis And Selection Of Sensor Position For Testing The Vibration Performance Of Automobile Cushion

With the rapid economic development and the improvement of people’s living standards, the automotive industry has made significant development, during this period, the electric seat has been widely used, cushion framework is an important part of the electric seat.it has hosted occupants to adjust posture and take slow down the effect of body vibration. It has great significance to improve the quality of cushion to improve the overall comfort and safety. The auto parts company have high demand to electric drive detection device, the vibration signals of one location collected by detection device, then to understand the fit of the electric drive components by analyzing vibration signal, so, it is important collected position signals. This paper’s research object is the auto electric parts performance detection device and electric basin, according to the requirements of factory production, performance test of auto electric parts plant in testing electric basin skeleton to find the best acceleration sensor placement.In this paper, analysis dynamic characteristics of cushion based on the finite element theory, using CAD software and CATIA to establish cushion geometry model, using the data interface of Hypermesh iges import geometry model, focusing on a simplified model of the cushion base, geometry cleanup and a unit selection are finite element modeling technology, through the establishment of a research base to facilitate the analysis of finite element model of the basin. The CDB file transfer by the Hypermesh import into ANSYS Workbench. situate the vibration simulation in the ANSYS Workbench, to analysis the finite element model and random vibration, obtaining the intrinsic characteristics of the cushion and vibration acceleration. The verification is based on the analysis of the cushion structure, experimental conditions and the detection device, experimental results show that the results of the simulation analysis is consistent with the actual situation, we succeeded in finding the optimal sensor placement, reaching the actual plant production requirements.Through this study, we found optimum acceleration sensor placement when detect the cushion skeleton, so it can play on better function of auto parts performance testing drive, has played a powerful role in promoting For the development of automotive testing technology.