초록 열기/닫기 버튼
Indoor noise of a vehicle is becoming more important as indoor space increases due to the electrification of vehicles and autonomous driving. In order to utilize the wider indoor space, a vehicle seat with long-rail is required. A noise evaluation of the longer structure and increased operating speed is required. In this paper, OTPA was used to evaluate noise contribution. Responses were measured by accelerometers and microphone at points determined as noise points, and the contribution of each noise source was analyzed by using the SVD and PCA methods. In addition, sound pressure was measured directly at the headrest position and compared with the value calculated via response synthesis in order to increase the reliability of signal processing. The contribution of the structure-borne noise was greater than the motor noise, and the contribution of the lower rail was the highest. Furthermore, it was confirmed that the main frequency for noise contribution was 400 Hz.
키워드열기/닫기 버튼
OTPA, Long-rail, Vehicle seat, PCA, SVD, Structure-borne noise, Air-borne noise
