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对分形理论在旋转机械故障诊断中的应用做了初步研究，提出用分数维来定量描述转子轴心轨迹的特征，分析结果表明轴心轨迹的分数维直接反映转子的稳定程度，可用轴心轨迹的分数维来帮助判别旋转机械的故障。
The application of fractal theory in the fault diagnosis of rotating machinery is preliminarily studied. The fractal theory is proposed to quantitatively describe the characteristics of rotor axial trajectory. The analysis results show that the fractal dimension of the axial trajectory directly reflects the stability of the rotor. The fractal dimension to help identify the failure of rotating machinery.