Fault detection method and fault detection apparatus used for shafting device

Abstract

The embodiment of the invention discloses a fault detection method and fault detection apparatus used for a shafting device, relating to the automatic control technical field, and can detect and discriminate minimal fault forms, and increase fault prediction accuracy. The method comprises: obtaining operation signals of a shafting device in a ship when the ship sails smoothly, the operation signals comprising displacement, speed and acceleration signals of the bearing, axle tube and coupler in the shafting device in vertical and horizontal directions; performing frequency domain main energy extraction on the operation signals, generating reconstructed signals, performing continuous wavelet decomposition on the reconstructed signals, and generating a wavelet grey-scale map based on the result of continuous wavelet decomposition; performing feature extraction on the wavelet grey-scale map, removing redundancy feature vectors with relevance, and generating a fault characteristic vector set according to kept characteristic vectors; and determining whether the shafting device has faults in dependence on the fault characteristic vector set. The fault detection method and fault detection apparatus are suitable for shafting device fault detection.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a fault detection method and a fault detection device for shafting equipment. Background technique [0002] At present, the shipbuilding industry has become one of the export-oriented industries with strong international competitiveness in my country, and the production and research and development capabilities of ship equipment have been increasing year by year. Compared with other industrial products, marine equipment often faces problems such as harsh working environment, long continuous working hours, and being easily eroded by seawater. These problems can easily accelerate equipment degradation and aging, resulting in equipment failure, scrapping, and even safety accidents. The shafting rotating equipment is an important ship equipment, which is widely used in the ship power system, mainly used for bearing power conversion and power transmission. The normal operati...

AI Technical Summary

Problems solved by technology

However, most of the accidents caused by shafting faults appear as minor faults in the early stage, and the fault symptoms are not obvious. It is difficult to identify the existence of minor faults through the vibration method, and the accuracy of fault prediction is low.

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