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Due to their low frictional resistance, fast startup, low power consumption, and high mechanical efficiency, rolling bearings are widely used in medical apparatus, auto industry, mineral industry, aerospace industry, etc. It is necessary to monitor the running condition of them to prevent breakdown during their operation. This paper presents an approach for detecting the initial failure of rolling...
The theory of life prediction is the key foundation of the safety service of electromechanical device, and it is also an important aspect of modern mechanical design and manufacturing. Life prediction for major mechanical equipment has great significance for economic development and defense construction. This paper aims at the investigation of characteristics and applications of electromechanical...
Due to the continuous development of electronic products, the problem of cooling fan noise is receiving increasing attention. Especially, in recent years, low noise has become a highly competitive factor in the purchase of fan equipment. The design of low-noise fans and the noise reduction methods are the urgent demand of manufacturers as well as consumers. This paper summarizes the present noise...
To monitor the initial failure of cooling fan's rolling bearing, this paper reviews the theory of autoregressive (AR) model and the minimum entropy deconvolution (MED) filtering technique. The AR method can remove the deterministic components of the original signal, and the MED filter could reduce the effect of the transmission path. These two filtering techniques were combined in this paper to pre-process...
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