ABSTRACT

The dependence of displacement on the low-cut frequency suggests that the low-frequency noise is responsible for the drift. Although the cause of the noise is unknown, at least one case is certain that the low-cut frequency should ensure the displacement drift within a reasonable range. To obtain the low-cut frequency, this paper proposes an adaptive method to quantify the threshold for newly-proposed parameters regarding the displacement. Low-cut frequencies determined by this study and those derived using traditional methods are compared. Their divergence on the inelastic spectra is studied by wavelet package decomposition which verifies the validity of the low-cut frequency.

摘要

位移对低切频率的依赖性表明低频噪声是造成漂移的原因。尽管产生噪声的原因尚不清楚，但至少有一种情况可以肯定，低切频率应确保位移漂移在合理范围内。为了获得低切频率，本文提出了一种自适应方法来量化新提出的有关位移的参数的阈值。本研究确定的低切频率与使用传统方法得出的低切频率进行了比较。通过小波包分解研究了它们在非弹性谱上的发散，验证了低切频率的有效性。