混合谱动态测试信号综合分析法

提出的混合谱动态测试信号综合分析法 ,是经典谱分析方法和现代谱分析方法的综合应用 ,即先用奇异值分解法确定混合谱信号中的谐波数 ,然后用FFT法逐个分离谐波分量 ,最后用线性回归分析方法同步分离非周期信号和随机信号分量 .还给出了“综合分析法”的数学模型 ,并通过计算机仿真证明了该方法可高精度地辨识和分离测试信号中不同特性的信号分量 ,是一种用计算机自动处理一般几何量动态测试信号的有效方法

Compound Method to Analyze Dynamic Measuring Signals by Harmonic Spectrum

A new method to analyze dynamic measuring signals by Harmonic Spectrum is proposed. This method is a compound application of traditional spectrum analysis and modern spectrum analysis. With this method, the number of the harmonic waves is determined by singular value decomposition (SVD) method. Then, the harmonic wave components are separated one by one through FFT. Finally, non period components and random components are separated simultaneously by linear regression analysis method. The mathematical model of the general analysis method is also given in this paper. The results of computer simulation have proved that this method can identify and separate the components of different characteristics in the measurement signals with high accuracy and that it is an effective method to automatically process dynamic measuring signals of general geometrical parameters.