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旋转机械的轴心轨迹包含着丰富的反映其运行状态的信息，但由于各种噪声的干扰，实测的轴心轨迹往往非常混乱，以致难以从中获得有用的信息．利用小波及小波包分解与重建以及小波变换模极大值随尺度变化时截然不同的性质来实现轴心轨迹消噪结果表明利用小波降噪提纯轴心轨迹，效果良好。
The orbital path of a rotating machine contains a wealth of information that reflects its operational status, but due to various noise disturbances, the measured axial trajectory is often so confusing that it is difficult to obtain useful information. The wavelet transform and wavelet packet decomposition and reconstruction and wavelet transform modulus maxima with different scales when the nature of the axis trajectory to achieve denoising results show that the use of wavelet denoising axis trajectory, the effect is good.