Research on testing method of unbalance in dynamic balance testing system

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Research on testing method of unbalance in dynamic balance testing system
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                        Ren SaipuRen Saipu
1.School of Physics and Electronic Sciences, Changsha University of Science & Technology, Changsha 410114, China; 2. Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the NearEarth Electromagnetic Environments, Changsha 410114, China
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Wu DingxiangWu Dingxiang
2. Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the NearEarth Electromagnetic Environments, Changsha 410114, China; 3. Changsha Billion set Intelligent Technology Co., Ltd., Changsha 410004, China
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Tang LijunTang Lijun
1.School of Physics and Electronic Sciences, Changsha University of Science & Technology, Changsha 410114, China; 2. Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the NearEarth Electromagnetic Environments, Changsha 410114, China
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Affiliation:1.School of Physics and Electronic Sciences, Changsha University of Science & Technology, Changsha 410114, China; 2. Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the NearEarth Electromagnetic Environments, Changsha 410114, China; 3. Changsha Billion set Intelligent Technology Co., Ltd., Changsha 410004, China
Clc Number:TN911.72
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Abstract:

A new HilbertHuang transform (HHT)based filtering method is proposed to solve the problem of low accuracy of unbalance measurement in dynamic balancing test system. This method is applied to the dynamic balance test system to analyze the original vibration signal and the frequency signal in order to infer the quality and phase of the unbalance. Firstly, the vibration signal can be resolved into a series of intrinsic mode functions (IMFs) through empirical mode decomposition (EMD).Secondly, the Hilbert marginal spectrum of these IMFs will be figured out by Hilbert transform. Finally, combining with the trochanter’s frequency ,the useful vibration signal are able to be selected from the original signal. According to the amplitude and frequency of the useful vibration signal, the quality and phase of the unbalance are capable of figured out. The experimental results show that the proposed method is more accurate and more effective than the conventional digital filtering method in the dynamic balance measurement system.

Key words:dynamic balance; unbalance;HHT

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Online: September 23,2017
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