Study on Signal Reconstruction in Time-domain for Excitation Input Spectrum of Suspension Seat
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摘要: 为获得司机悬架座椅振动仿真和试验的激励时域输入,根据国家标准规定的激励输入谱,基于信号离散傅里叶逆变换和频域积分对振动激励的加速度输入谱进行时域信号重构,获得时域中的激振输入加速度、速度和位移信号。对比时域重构信号的功率谱密度和标准功率谱密度,两者能精确吻合,证明提出的方法能准确实现输入谱的时域信号重构。Abstract: In order to obtain the excitation inputs for vibration simulation and test of operator suspension seat,the vibration excitations in time-domain,such as acceleration,velocity and displacement,are reconstructed in this paper based on the inverse discrete Fourier transform( IDFT) and frequency domain integration methods,according to the excitation input spectral specified in national standards. Compared with the power spectral densities( PSDs) in national standards,the PSDs of the accelerations reconstructed in time-domain are exactly matched with the standard PSDs,by which it can be proved that the proposed method in this paper can accurately reconstruct the excitation input spectral in time-domain.
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Key words:
- acceleration /
- computer simulation /
- experiments /
- flowcharting
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