Robust optimal design of the FDBs in a HDD to reduce NRRO and RRO

This research proposes a robust optimal design methodology of the FDBs in a HDD to reduce RRO and NRRO. The critical mass, which determines the dynamic behavior of rotor-bearing system, was selected as an objective function, and the constraint equations were the friction torque of the FDBs, and the...

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Bibliographic Details
Published in:Microsystem technologies 2012-09, Vol.18 (9-10), p.1335-1342
Main Authors: Lee, Jihoon, Jang, Gunhee, Ha, Heonjeong
Format: Article
Language:English
Subjects:
Electronics and Microelectronics
Engineering
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Instrumentation
Mechanical contact (friction...)
Mechanical Engineering
Nanotechnology
Physics
Solid mechanics
Structural and continuum mechanics
Technical Paper
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Summary:This research proposes a robust optimal design methodology of the FDBs in a HDD to reduce RRO and NRRO. The critical mass, which determines the dynamic behavior of rotor-bearing system, was selected as an objective function, and the constraint equations were the friction torque of the FDBs, and the stiffness and damping coefficients related with under-damped vibration modes. Ten major design variables of the FDBs were chosen in this optimization problem. The steady-state whirl radius and the shock response at half-speed whirl of the rotating rigid spindle-bearing system were evaluated as RRO and NRRO, respectively. RRO and NRRO of the optimal design were compared with those of conventional one, and it showed that the proposed method could effectively reduce RRO and NRRO.
ISSN:0946-7076
1432-1858
DOI:10.1007/s00542-012-1539-4