郭力,王伟程,郭君涛.单颗磨粒划擦陶瓷声发射信号 与材料去除体积关系研究[J].湖南大学学报:自然科学版,2021,(8):37~43
单颗磨粒划擦陶瓷声发射信号 与材料去除体积关系研究
Study on Relationship between Acoustic Emission Signal and MaterialRemoval Volume of Single Diamond Abrasive Scratching Ceramics
  
DOI:
中文关键词:  工程陶瓷  声发射监测  单颗金刚石磨粒划擦  表面创建  材料去除体积  时间序列模型
英文关键词:engineering ceramics  acoustic emission monitoring  single diamond abrasive scratching  surface creation  material removal volume  time series model
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作者单位
郭力,王伟程,郭君涛 (湖南大学 机械与运载工程学院湖南 长沙 410082) 
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中文摘要:
      针对硬脆难磨削的氧化锆和氧化铝两种工程陶瓷,研究其磨削表面创建的声发射监测,研究单颗金刚石磨粒划擦陶瓷材料的去除体积与其对应的声发射信号之间的关联. 试验结果表明:随着单颗磨粒划擦陶瓷去除体积的增大,其声发射信号在低频段的信号能量占比增大;声发射信号的均方根值、最大幅值和标准差等特征值增大,且这两种陶瓷材料单颗磨粒划擦声发射信号特征值的增大趋势不同;但这些声发射信号的特征值大小都与其对应的陶瓷材料去除体积有关. 同时单颗磨粒划擦陶瓷的声发射信号的时间序列自回归AR(2)模型可以表示其对应的声发射信号. 时间序列自回归AR(2)模型特征参数的绝对值都随划擦陶瓷去除体积增大而增大,且增大趋势与其声发射信号特征值的增大趋势相似. 为工程陶瓷磨削表面创建的声发射在线监测打下了基础.
英文摘要:
      Acoustic Emission(AE) monitoring of hard and brittle and hard ground zirconia and alumina engineering ceramics created in their ground surface was studied,and the correlation between the removal volume of a single diamond abrasive scratch ceramic materials and its corresponding acoustic emission signals were studied. The experimental results show that with the increase of the removal volume of a single diamond abrasive scratched ceramic,the signal energy ratio of the acoustic emission signal in the low-frequency range increases,and the eigenvalues such as root mean square,maximum amplitude and standard deviation of acoustic emission signal increase,and the increasing trends of the two ceramic materials are different; But the characteristic values of these acoustic emission signals are all related to the corresponding removal volumes of the two kinds of ceramic materials. At the same time,time series autoregressive AR(2) model of the acoustic emission signals of a single abrasive scratch ceramics can completely represent the corresponding acoustic emission signals. The absolute values of the time series autoregressive AR (2) model eigenvalues increase with the increase of the two kinds of ceramics scratch removal volumes,and the increasing trends are similar to that of the acoustic emission signal eigenvalues. Acoustic emission signals can be an ideal data source for the online monitoring of surface creation in grinding processes of engineering ceramics.
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