汇报题目：参加IMECE 2018国际会议总结报告会
汇报时间：2018年11月26日(星期一) 09:00
汇报地点：科技园西五楼北A328会议室
汇报人：郝龙
会议名称：International Mechanical Engineering Congress & Exposition（IMECE2018）
会议时间：Nov. 9-15,2018
会议地点：Pittsburgh, Pennsylvania, America
会议简介：ASME's International Mechanical Engineering Congress and Exposition (IMECE) is the largest interdisciplinary mechanical engineering conference in the world. IMECE plays a significant role in stimulating innovation from basic discovery to translational application. It fosters new collaborations that engage stakeholders and partners not only from academia, but also from national laboratories, industry, research settings, and funding bodies.
会议交流工作
Oral presentation: Research on the weak signal detection of bearing fault based on Duffing oscillator
报告人：郝龙
参加论文信息
Title: Research on the weak signal detection of bearing fault based on Duffing oscillator
Author: Long Hao, Dan Liu, Fei Liu, Qingxin Wang, Lin Liang, Guanghua Xu
Abstract:In this paper, chaotic system is applied to identify and extract the weak signals of bearing early fault which are often submerged in strong background noise. Chaotic system is an effective method in weak signal detection because of its properties of noise immunity and sensitivity to the weak periodic signal. However, chaotic system is not completely immune to noise in critical chaotic state. Aiming at this problem, four indicators are used to evaluate the detection performance of Duffing oscillators. Then, the influence of Duffing oscillator parameters on the four indicators is studied in detail and a new method is proposed to improve the detection performance of Duffing oscillator. The simulation and experimental results show that the proposed method can accurately obtain the characteristic signals of early bearing fault in a lower signal-to-noise ratio (SNR) situation.
