NDLI: An Insight Into the Nonlinear Touchdown Dynamics of TFC Active Slider

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An Insight Into the Nonlinear Touchdown Dynamics of TFC Active Slider

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An Insight Into the Nonlinear Touchdown Dynamics of TFC Active Slider

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chen, Gang (Sheng) Xu, Jianfeng Chang, J. -Y
Copyright Year	2013
Abstract	Storage of 10 Tb/in 2 in hard disk drives within the next decade requires a significant change to reduce the physical spacing as little as 0.25 nm at the read-write transducer location. A lot of tribology issues exist to such a low flying height, the touch down and take off instability and hysteresis, the flying height avalanche, the influences of surface topography and morphology, the lubricant modulation and pick-up, robust air bearing surface and suspension design, just to name a few. Understandings of the complex tribo-dynamics issues in the near contact and contact states are very important to further reduce the flying height. At such a small spacing intermittent contact between the slider and disk surface becomes inevitable and the current MEMS-based thermal fly-height control (TFC) technology needs further improvement to satisfy the future needs. How to control the slider to reduce touchdown instability and eventually eliminate bouncing has been a pressing and challenging research topic. Most of existing work on touchdown dynamics applied conventional nonlinear dynamics theory and spectrum as well as harmonics analysis, which could suffer from the assumptions of small nonlinearity and stationary. This study presents a concurrence plot and Lyapunov exponent analysis which could offer an insight to the problem in the context of contemporary nonlinear dynamics theory.
Sponsorship	Information Storage and Processing Systems Division
File Format	PDF
ISBN	9780791855539
DOI	10.1115/ISPS2013-2803
Conference Proceedings	ASME 2013 Conference on Information Storage and Processing Systems
Language	English
Publisher Date	2013-06-24
Publisher Place	Santa Clara, California, USA
Access Restriction	Subscribed
Subject Keyword	Design Microelectromechanical systems Nonlinear dynamics Transducers Storage Lubricants Dynamics (mechanics) Pressing Disks Air bearings Tribology
Content Type	Text
Resource Type	Article

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