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为了对三坐标测量机动态误差进行精确分解与分析,掌握其组成成分和特征,根据动态误差的特点,组合使用最小二乘法、自适应陷波、短时傅立叶变换等多种信号分析方法对测量数据进行分析,同时实现了复杂信号的趋势项分离、谐波个数鉴别与分离以及调幅信号解调等,与小波分析方法相比具有更好的分离效果。
In order to accurately decompose and analyze CMM’s dynamic error, grasp the composition and characteristics of the CMM, according to the characteristics of dynamic error, use the combination of least square method, adaptive notch, short-time Fourier transform and other signal analysis methods to measure Data analysis, while achieving the separation of trend signals of complex signals, the identification and separation of harmonic number and the demodulation of AM signals, etc. Compared with the wavelet analysis method has a better separation effect.