CAJ | 학술논문

为了排除汽车燃油箱台架实验中台架本身振动信号对油箱晃动噪声的影响，设计了台架测试实验并提出一种信号处理的方法，通过建立多输入、单输出系统模型，进行偏奇异值分析辨识独立声源和典型振动测点，并对振动和噪声信号进行相干分析计算，从噪声信号中分离出油箱燃油晃动噪声时域信号。提出了得到声压级修正曲线的方法，能快速实现燃油箱台架实验噪声评价结果的修正。该信号处理方法能够有效剔除台架实验中其他环境噪声的干扰，得到仅由燃油晃动引起的噪声信号。
위료배제기차연유상태가실험중태가본신진동신호대유상황동조성적영향，설계료태가측시실험병제출일충신호처리적방법，통과건립다수입、단수출계통모형，진행편기이치분석변식독립성원화전형진동측점，병대진동화조성신호진행상간분석계산，종조성신호중분리출유상연유황동조성시역신호。제출료득도성압급수정곡선적방법，능쾌속실현연유상태가실험조성평개결과적수정。해신호처리방법능구유효척제태가실험중기타배경조성적간우，득도부유연유황동인기적조성신호。
To exclude the effect of bench vibration signals on a car fuel tank sloshing noise in its benth vibration test,a signal processing method was proposed.By using a multi-input/single-output system method,independent sound sources and typical vibration measuring points were identified with the singular value decomposition (SVD ).The coherences of typical vibration and noise signals were calculated by using the coherence analysis method.The car fuel tank sloshing noise was separated from combined signals of environment noises.To quickly correct the results of the fuel tank sloshing noise bench test evaluation,a method was proposed to get the sound pressure level correction curve.This signal processing method could be used to effectively eliminate the interference from other environment noises in the bench vibration test.