The change of fractal dimension was irregular with the change of voltage.
分形维数随外加电压的改变呈现不规则的变动。
The evolution curve show known that fractal dimension and damage variable present nonlinear increase with the increment of stress, and the change of fractal dimension is relatively smooth.
通过演化曲线可以看出，分形维数与损伤变量随应力的递增均呈非线性增加，但分维的变化较平缓；
When the fault appears, there will be some variation in the fractal dimension of measurement signal, and the fault detection can be carried out according to this change.
由于故障发生时系统表现异常，这些异常可导致测量信号分形维数的变化，根据这些变化可进行故障检测。
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