Ultra sensitive in-situ acoustic characterization system for HDD head disc interface defectoscopy
Ultra sensitive in-situ acoustic characterization system for HDD head disc interface defectoscopy
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DOI：
10.1007/s00542-006-0322-9
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
A. Daugela;Subrahmanyan Nagarajan;Z. Boutaghou
中科院分区：
文献类型：
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作者：
A. Daugela;Subrahmanyan Nagarajan;Z. Boutaghou
一种超灵敏的驱动级声学表征系统已被开发用于现场头盘界面缺陷检查。多模态声发射（AE）传感器安装在驱动器盖上，用于跟踪空气轴承（AB）和滑块模式。在AB和滑块带宽处的连续模态变化与弱头盘界面（HDI）相互作用（诸如润滑剂调制和颗粒引起的缺陷）相关。通过先进的传感器、数据采集硬件和数字信号处理算法的组合，可以实现灵敏度的两个或三个数量级的提高。连续和离散小波变换和联合时频分析的AB模态数据挖掘过程中实现。新开发的技术的性能在正常运行的硬盘驱动器（HDD）上进行了演示。
An ultra sensitive drive level acoustic characterization system has been developed for in-situ Head Disc Interface defectoscopy. Multimode acoustic emission (AE) sensor installed on the drive cover is designed for tracking air bearing (AB) and slider modes. Monitored modal changes at the AB and slider bandwidth correlate to the weak head disc interface (HDI) interactions such as lubricant modulation and particles induced defects. Two or three orders of magnitude increase in sensitivity can be achieved by a combination of advanced sensors, data acquisition hardware and digital signal processing algorithms. Continuous and Discrete Wavelet Transform and Joint Time-Frequency analyses are implemented for the AB modal data mining process. Performance of the newly developed technology is demonstrated on a normally operating hard disc drive (HDD).