Nanoscale dynamics of MEMS TFC active slider |
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Authors: | Gang Sheng Jianfeng Xu |
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Affiliation: | 1. College of IT and Engineering, Marshall University, Huntington, WV, 25755, USA 2. State Key Laboratory of Digital Manufacturing and Equipment, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
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Abstract: | With enabling of a thermal actuator, an air bearing slider can fly at sub-nanometer level spacing on a magnetic disk while the recording elements are functioning. At such spacing, the slider stability and head-disk interface reliability remains to be understood. In this study, a novel understanding on dynamics of the MEMS thermal flying-height control (TFC) slider in touchdown process is developed. By using average and variational-iteration methods, closed-form spectrum estimations of slider vibration are derived. The derived formulation offers an insight of the relationship between spectrum and interface parameters. Physics-based simulation is also conducted to quantify the spectrum of slider vibrations as a function of varied interfacial parameters. To further extend the analytical and numerical analysis, the experimental study of a TFC slider while flying on a rotating disk at sub-nanometer spacing are performed. The analysis reveals the dominance of the air bearing force among other interfacial forces at sub-nanometer spacing. |
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