An Adaptive Noise Reduction Method Based on Improved Dislocation Superposition Method for Abnormal Noise Fault Component of Automotive Engine

叠加原理 噪音(视频) 断层(地质) 小波 信号(编程语言) 降噪 算法 背景噪声 声学 计算机科学 工程类 控制理论(社会学) 数学 人工智能 物理 数学分析 控制(管理) 地质学 地震学 图像(数学) 程序设计语言
作者
Jiaoyi Hou,Pengwei Guo,Aoyu Xu,Dayong Ning,Shengtao Chen,Zengmeng Zhang,Yongjun Gong,Yinglong Chen,Hao Tian,Hongwei Du
出处
期刊:Shock and Vibration [Hindawi Publishing Corporation]
卷期号:2021: 1-14 被引量:1
标识
DOI:10.1155/2021/6998232
摘要

The acoustic signal generated by mechanical motion contains the information of its motion state, but when the signal-to-noise ratio (SNR) is low, the accuracy of real-time monitoring mechanical motion state by the acoustic signal is low. This study proposes an adaptive noise reduction method based on the dislocation superposition method (DSM), which can realize the adaptive noise reduction and the extraction of fault a component from the automobile engine abnormal noise signal of low SNR. Firstly, the wavelet coefficients of engine abnormal noise signal are obtained by continuous wavelet transform (CWT), and the fault feature points of the abnormal noise signal in each period are extracted by setting hard threshold function, window function, and feature points extraction algorithm. Then, the signal segments containing fault components are obtained by using the position of feature points to extend the length of the fault component forward and backward, respectively, and Pearson’s correlation is calculated by traversal to determine the starting superposition point of each signal segment containing fault components. Finally, the signal segments of the odd group and even group are selected for superposition calculation. When the superposition stop condition is not satisfied, the number of superpositions increased until the stop condition is satisfied, and the superposition signal can be used as a fault component. The experimental results show that, compared with the improved DSM, this method has a good effect on the noise reduction and extraction of fault components of automobile engine cylinder knocking fault, and the effectiveness of this method is verified. This method is used to reduce the noise and extract the fault components of automobile engine cylinder missing fault and knock fault, and good results are obtained.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
英勇语山发布了新的文献求助10
刚刚
1秒前
2秒前
3秒前
周凡淇发布了新的文献求助10
3秒前
舒适的石头完成签到 ,获得积分10
3秒前
3秒前
Mini33发布了新的文献求助50
4秒前
4秒前
wyp发布了新的文献求助10
5秒前
搜集达人应助kiki采纳,获得10
5秒前
不lex2之发布了新的文献求助10
5秒前
6秒前
刻苦的长颈鹿完成签到,获得积分10
6秒前
神华发布了新的文献求助10
6秒前
ooo完成签到 ,获得积分10
7秒前
Lele完成签到,获得积分10
7秒前
明天发布了新的文献求助10
8秒前
传奇3应助念心采纳,获得10
8秒前
橙子发布了新的文献求助20
9秒前
ysynqqr完成签到,获得积分20
9秒前
烟花应助每㐬山风采纳,获得10
11秒前
充电宝应助SmallBamboo采纳,获得10
11秒前
韭菜盒子完成签到,获得积分20
11秒前
TYM发布了新的文献求助10
13秒前
Rondab应助流川封采纳,获得10
13秒前
魔音甜菜发布了新的文献求助10
14秒前
在水一方应助橙子采纳,获得10
15秒前
yuqinghui98发布了新的文献求助10
15秒前
老阎应助WWUUUU采纳,获得50
15秒前
CipherSage应助哼哼唧唧采纳,获得10
16秒前
18秒前
18秒前
明天完成签到,获得积分10
19秒前
烟花应助美味的薯片采纳,获得10
19秒前
Ava应助动听糖豆采纳,获得10
19秒前
Ava应助ll采纳,获得30
21秒前
tetrakis完成签到,获得积分10
21秒前
22秒前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
Problems of point-blast theory 400
北师大毕业论文 基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 390
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
Novel Preparation of Chitin Nanocrystals by H2SO4 and H3PO4 Hydrolysis Followed by High-Pressure Water Jet Treatments 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3998622
求助须知:如何正确求助?哪些是违规求助? 3538115
关于积分的说明 11273407
捐赠科研通 3277045
什么是DOI,文献DOI怎么找? 1807368
邀请新用户注册赠送积分活动 883854
科研通“疑难数据库(出版商)”最低求助积分说明 810070