Blind source separation of correlated vibration sources
Yu Gang1, Zhou Yiqi1, Zhang Weifen2
1. Key Laboratory of High-efficiency and Clean Mechanical Manufacture at Shandong University, Ministry of Education, Shandong Jinan 250061;
2.Unit 72850 of PLA, Jinan 250032
The conventional blind source separation (BSS) method, such as independent component analysis (ICA), is restricted to separate the correlated sources. However most vibration sources generated in different structure are correlated, which will result into the failure of ICA. So we propose a new BSS method which is capable of separating correlated sources. It is divided into two steps. Firstly, it is needed to remove the correlated component, and then the reminder component can be regarded as uncorrelated sources to process. Theoretical analysis, simulation and experiment are employed to validate the effectiveness of the proposed method.
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