Computer Science

Computer Science ›› 2018, Vol. 45 ›› Issue (9): 146-151.doi: 10.11896／j.issn.1002-137X.2018.09.023

• Network & Communication • Previous Articles     Next Articles

Research on Stochastic Resonance Characteristics of Cascaded Three-steady-state and Its Application

ZHANG Gang, GAO Jun-peng, LI Hong-wei   

  1. Chongqing Key Laboratory of Signal and Information Processing,Chongqing University of Posts and
    Telecommunications,Chongqing 400065,China
  • Received:2017-08-09 Online:2018-09-20 Published:2018-10-10

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Abstract: In order to solve the problem of weak signal detection difficulties in strong noise environment,using SNR gain and the spectral height of characteristic frequency as the measurement indexes,this paper studied the cascaded tri-stable stochastic resonance system and analyzed its characteristics.The simulation results show that the cascaded tri-stable stochastic resonance system can achieve better output than single-stage tri-stable resonance system through tu-ning the parameters.In addition,in order to solve the problem that the weak signal in the actual gear fault diagnosis is difficult to extract,this paper proposed a gear fault diagnosis method by using cascaded tri-stable stochastic resonance system.The results show that this method can effectively extract the weak characteristics of gear fault,and realize the early gear fault diagnosis.Therefore,it has a wide range of engineering application prospects.

Key words: Cascaded tri-stable stochastic resonance system, Fault diagnosis, Gear, Parameter tuning, Weak signal detection

CLC Number: 

  • TN911.23
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