【摘要】 为了提高双频信号参数估计在工程测量领域的精度,创新的提出了基于希尔伯特-黄变换和数据拟合算法估计双频信号参数的方法;输入系统的双频信号序列先经过EMD分解算法得到单频的信号序列,采用Hilbert变换得到信号的频率、幅值和相位信息,通过数据拟合算法对信号的频率、相位和幅值等进行校正,校正后参数的值可以精确到两位小数;为了增强该方法在操作上的便捷性和交互性,基于Matlab的GUI工具箱开发界面程序。更多还原

【Abstract】 In order to improve the accuracy of two-frequency signal parameters in the field of engineering survey,innovation is proposed based on Hilbert- Huang Transform and data fitting algorithm to estimate the two-frequency signal parameters.The single frequency signal sequence is first obtained through EMD decomposition algorithm from the two-frequency signal sequence input to the system,and then frequency,phase and amplitude information can be gained with Hilbert Transform and corrected through data fitting algorithm.The maximum parameter error after correction is accurate at two decimal places.In order to enhance the convenience and interaction of this method,the interface program is developed based on Matlab GUI toolkit.更多还原