势函数特征参数调节的随机共振及其动车轴承故障检测研究

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Abstract Potential function characteristic parameters (PFCPs) including barrier height and potential well spacing are changed simultaneously when system parameters are adjusted in a classical bi-stable stochastic resonance (SR) system. Here, the variable substitution method was used to realize PFCPs being decoupled, which was beneficial to adjusting potential function. Then the SR method based on adjustable PFCPs was proposed, according to the matching principle between Kramers escape rate and target signal frequency, target signal detection was realized. In order to overcome the difficulty of sampling frequency ratio’s high demand for SR, the technique of frequency information exchange (FIE) was introduced and combined with the proposed method to realize signal detection with lower sampling frequency ratio. The detection results for bearing faults of EMU bogie system verified the effectiveness of the proposed method.

Key words： potential function characteristic parameters SR signal detection high-speed railway bearing

Received: 05 January 2018 Published: 28 June 2019

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	Articles by authors
	LIU Jinjun1
	2
	LENG Yonggang1
	ZHANG Yuyang1
	TAN Dan1
	FAN Shengbo1

Cite this article:

LIU Jinjun1,2,LENG Yonggang1, et al. Stochastic resonance with adjustable potential function characteristic parameters and its application in EMU bearing fault detection[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(13): 26-33.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I13/26

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