单输入单输出的频域模态参数识别方法，正交多项式拟合法，通过拟合频响函数曲线得到结构的固有频率、阻尼-Single-input single-output frequency domain modal parameter identification method, orthogonal polynomial fitting, the natural frequency of the structure obtained by fitting the curve of the frequency

数据处理方面的曲线拟合：多项式曲线拟合+周期曲线拟合-measuring data processing field curve fitting : polynomial and regulative methods

用最下二乘法多项式进行曲线拟合进而插值。(With the least two multiplicative polynomial for curve fitting, and then interpolation.)