We used spectral estimation to find the main frequency in the vibration signal.
我们用谱估计来找出振动信号中的主要频率。
Accurate spectral estimation is difficult when the data are short and corrupted by noise, so the researchers applied a parametric method to improve resolution.
当数据很短且被噪声污染时,准确的谱估计很困难,因此研究人员采用参数化方法来提高分辨率。