PROBABILITY DISTRIBUTION DENSITY OF VIBRATING NOISES OF ELECTROMOTOR IN AIR-CONDITIONER AND THEIR HYPOTHESIS TEST
Zhao Xue-zhi · Proceedings of the CSEE · 2004
The detection for electromotor's noise is an important working procedure in the air-conditioner's manufacture.In order to detect the noise effectively, the probability distribution rule of different noises of electromotor in air-conditioner is researched and a testingly statistical variable is proposed to carry out the hypothesis test for the density function in this paper.The results show that the electromagnetic noise and the noise of unbalanced rotor are both subject to the normal distribution but their distributed parameter is completely different. And the noise of injuring bearing is not submit to the normal distribution.The testingly statistical variable of the three kinds of noise have obvious feature and are located in the completely different area and by virtue of this variable and the distributed parameter the type of noise can be recognized reliably and effectively.