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将分形维数用于刻划滚动轴承在不同故障状态下表现的非线性行为，进而对轴承的运行状态进行判别．实验结果表明，滚动轴承振动信号在不同运行状态下的分形维数是不同的，可以＊将分形维数做为识别滚动轴承故障的特征量。
The fractal dimension is used to characterize the nonlinear behavior of the rolling bearing under different fault conditions, and then determine the operating status of the bearing. The experimental results show that the fractal dimension of rolling bearing vibration signals under different operating conditions is different, and the fractal dimension can be used as a feature to identify the fault of rolling bearing.