Notice of RetractionFault diagnosis in cracked rotor based on fractal box counting dimension

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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The vibration of large rotating machinery rotor system with a free-cracked shaft and cracked Shafts were simulated by the experiments on rotor experiment platform. According to the fractal characteristics of vibration signal about cracked rotor and free-cracked rotor shaft, fractal box counting dimensions of test data were calculated. The orbit of free-cracked shaft shows as an elliptic, and the corresponding fractal box counting dimension is small. The orbit of cracked shaft becomes more complex and its corresponding fractal box counting dimension is larger than that of free-cracked shafts. Vertical crack has less impact on the vibration of rotor while horizontal cracks have obvious impact. Therefore, the fractal box counting dimension can be used to fault diagnosis of cracked rotor.