基于现代信号分析方法的动态测量误差分解与溯源研究

Research on error decomposition and tracing of dynamic measurement based on modern signal analysis

在讨论信号分析方法的基础上,尝试着将现代信号分析方法运用于一种新的理论——动态测量误差溯源理论,建立了一个简单的动态测试仿真系统,分别用傅里叶变换和小波变换方法对系统输出的总误差进行分解与溯源,并对两种方法的处理结果作了比较,指出了小波分析方法在动态误差分解与溯源中的实用性和优越性,同时也验证了动态测试误差溯源理论的正确性和可行性。

A new theory,the dynamic error tracing theory,is put forward,and the modern signal analysis methods are applied to error decomposition and tracing of dynamic measurement. Based on a simple simulation system of dynamic measurement,the decomposition and tracing of the output error of this system are performed by using the Fourier transform and the wavelet transform. The results of the two analysis methods are compared,which shows the advantage and practicablity of the wavelet analysis method in the decomposition and tracing of dynamic error. And the correctness and feasibility of the dynamic error tracing theory are conformed.