Paper Search Console

Home Search Page About Contact

Journal Title

Title of Journal: Microsyst Technol

Search In Journal Title:

Abbravation: Microsystem Technologies

Search In Journal Abbravation:

Publisher

Springer-Verlag

Search In Publisher:

DOI

10.1007/bf02498253

Search In DOI:

ISSN

1432-1858

Search In ISSN:
Search In Title Of Papers:

Effect of suspension design on the nonoperational

Authors: Hao Zheng Aravind N Murthy Edmund B Fanslau Frank E Talke
Publish Date: 2009/05/07
Volume: 16, Issue: 1-2, Pages: 267-
PDF Link

Abstract

Hard disk drives must be designed to be resistant to operational and nonoperational shock Jayson et al in IEEE Trans Magn 3852150–2152 2002 Numerical and experimental results show that “lifttab separation” and “dimple separation” are two possible failure modes of presently used head suspension assemblies Murthy in PhD thesis Center for Magnetic Recording Research University of California San Diego 2007 In addition “dimple and tongue wear” at the interface of gimbal and dimple are areas of concern in the design and operation of high performance suspensions during shock In this investigation an improved numerical model for nonoperational shock response of a load/unload hard disk drive is implemented by including design parameters of suspension such as dimple preload suspension material dimple height and the surface diameter of the dimple in the model Results for dimple and lifttab separation as well as the maximum impact stress at the dimple region as a function of preload and suspension design parameters will be presentedThe shock response of a hard disk drive HDD is an important design consideration A number of studies have been made in the past to study the nonoperational shock response Allen and Bogy 1996 investigated experimentally the effect of high shock amplitude and short shock duration on a hard disk drive and compared their results with a finite element model using ABAQUS In their model they considered the effect of both the suspension and the hard disk on the shock behavior and defined contact between slider and disk in terms of gap contact elements Edwards 1999 developed a model of a 3½ inch hard disk drive using ANSYS He studied the effect of different shock conditions on the dynamic response of the whole disk drive by varying the contact stiffness of the impact surface Jayson et al 2002 2003 studied the shock response for both nonoperational and operational HDDs corresponding to linear and rotary shock inputs using LSDyna and developed a correlation between rotary and linear shock test Murthy et al 2007 studied the dynamic response of small form factor disk drives with both “thin” and “thick” enclosures due to external vibrations and shock They performed modal and vibration analysis on both models and investigated the relative ontrack and offtrack displacement amplitudes of a slider due to shock and vibration excitation Gao et al 2006 performed nonoperational shock analysis using a multibody dynamic analysis to determine the shock level which causes the slider to lift off from the disk They derived the governing equation for the voice coil motorhead actuator assembly system using a Lagrangian formulation and obtained the shock response of the hard disk drive by including the constraint equations between the slider and the disk surface Luo et al 2007 found that the lift off height of the slider reaches a peak value as a function of pulse width Shi et al 2006 considered a head actuator arm model to analyze the deflection of the tip of the arm relative to the pivot for various input pulse shapes and correlated their experimental results with predictions from numerical simulationsTo improve the performance and to increase the areal storage density load/unload L/UL drives are now widely used Murthy 2007 studied the L/UL process and investigated the effect of shock input as well as suspension and gimbal design on the head disk interface Feliss et al 2007 tested the shock and vibration response of microdrives during linear and rotary shock using a scanning Laser Doppler Vibrometer and compared their results with a finite element model for both nonoperational and operational conditions In a recent study Shu et al 2007 presented the relative displacement between the tip of the actuator arm and the pivot onto which the cantilever arm is fixed as a function of shock amplitude and duration They verified their numerical simulation using a simplified single degree of freedom model and investigated the relationship between maximum relative displacement and frequency ratioThe equivalent radius R in Eq 2 is defined by 1/R = 1/R 1 + 1/R 2 and the equivalent Young’s modulus is given by 1/E = left 1 v 1 2 right/E 1 + left 1 v 22 right/E 2 where R 1 and R 2 E 1 and E 2 υ 1 and υ 2 are the radii the Young’s moduli and the Poisson ratios of the dimple and gimbal respectively

Keywords:

References

.
Search In Abstract Of Papers:
Other Papers In This Journal:
  1. Position error reduction in magnetic disk drives using a head gimbal assembly with radial head motion capability
  2. Micro liquid rotor operated by surface-acoustic-wave
  3. Robust embedding of longitudinal position into tape servo signals
  4. Analysis of PDT noise originating from driving method of a HDD spindle motor
  5. Auto-focusing actuator and camera module including flexible diaphragm for mobile phone camera and wireless capsule endoscope
  6. Novel heat dissipation design for light emitting diode applications
  7. Hot embossing of thermoplastic multilayered stacks
  8. Piezoelectric in-plane microplate resonators based on contour and flexure-actuated modes
  9. A review of fabrication processes for vertical comb drives
  10. Reliability of Pt ohmic contact on an undoped 3C-SiC micro-electrothermal device
  11. Design and fabrication of a square shape bulk mode MEMS resonators
  12. Computational fluid dynamics for effects of coolants on on-chip cooling capability with carbon nanotube micro-fin architectures
  13. Cells adhered and cultured on microcantilevers
  14. Elicitation of a reference process model for tool-based micro technologies for planning and controlling purposes and user support
  15. LTO cartridge reel deflection under tape packing stresses
  16. In-situ fabrication of an out-of-plane microlens with pre-definable focal length
  17. Dynamic calibration method of inertial measurement units
  18. Two temperature theory of initially stressed electro-microstretch medium without energy dissipation
  19. Design of compact and wide bandwidth SPDT with anti-stiction torsional RF MEMS series capacitive switch
  20. Vibrational energy scavenging with Si technology electromagnetic inertial microgenerators
  21. Elastic coefficient analysis on planar S-shaped micro spring under high impact load
  22. Mechanical vibration and critical speeds of rotating composite laminate disks
  23. Enhanced electromigration reliability via Ag nanoparticles modified eutectic Sn–58Bi solder joint
  24. Precise measurement of angular position and speed of spindle motor during spin-up by computing differences in winding current rise time
  25. Motor noise generation and prediction for high spinning speed hard disk drive
  26. Study on the effect of heating plate thickness on the micro induction heater for thermal bubbles generation
  27. Analysis of electromagnetic interference of a capacitive RF MEMS switch during switching
  28. Ultra fine pitch flat panel display packaging using 3 μm conductive particles
  29. Fabrication of polystyrene microfluidic devices using a pulsed CO 2 laser system
  30. Enhanced efficiency of sorting sperm motility utilizing a microfluidic chip
  31. Bifurcation and chaos analysis of atomic force microscope system
  32. Analysis and testing of a contraction-and-expansion micromixer for micromilled microfluidics
  33. Shield-layers for reducing thermoelastic damping in resonating Silicon bars
  34. Multidimensional line dispensing of unfilled adhesives
  35. Multiple aspect-ratio structural integration in single crystal silicon (MASIS) for fabrication of transmissive MOEMS modulators
  36. Multiple aspect-ratio structural integration in single crystal silicon (MASIS) for fabrication of transmissive MOEMS modulators
  37. Vibration analysis of axially moving magnetic tape with comparisons to static and dynamic experimental results
  38. Flip chip packaging for MEMS microphones
  39. A chip scale nanofluidic pump using electrically controllable hydrophobicity
  40. MEMS switches controlled multi-split ring resonator as a tunable metamaterial component
  41. A study of acoustic noise generating mechanisms of small form factor HDDs
  42. Metallic micro displacement capacitive sensor fabricated by laser micromachining technology
  43. Laser moulding, a new low-cost fabrication process for micro- and nanostructured components
  44. Effect of physical vapor deposition metallic thin films on micro injection molded weld line mechanical properties
  45. Effects of geometric parameters for superhydrophobicity of polymer surfaces fabricated by precision tooling machines
  46. Modelling and evaluation of a thermal microfluidic sensor fabricated on plastic substrate
  47. Readout characteristics of a non-circular aperture mounted on an optical head slider flying above a medium having sub-100-nm-long patterns
  48. Micro injection molding of micro gear using nano-sized zirconia powder
  49. Design and test of a real-time shelf out-of-stock detector system
  50. Iterative design method for an image filter to improve the bit error rate in holographic data storage systems
  51. Impact of oxygen-permeable mold on fabrication of microchannels with ultraviolet curable materials
  52. Numerical investigation of slider dynamics induced by contacts with disk asperities
  53. Ellipsometric measurement accuracy of ultrathin lubricant thickness on magnetic head slider
  54. 3D-feature-based structure design for silicon fabrication of micro devices
  55. Depletion of monolayer liquid lubricant films induced by high-frequency pulsed-laser heating in thermally assisted magnetic recording
  56. Design, fabrication and testing of a high performance silicon piezoresistive Z-axis accelerometer with proof mass-edge-aligned-flexures
  57. Analysis of the correlation between acoustic noise and vibration generated by a multi-layer ceramic capacitor
  58. Performance improvement of square microhotplate with insulation layer and heater geometry
  59. A new energy harvester using a cross-ply cylindrical membrane shell integrated with PVDF layers
  60. Fabrication of polymer micro-tip by optical lensing technique
  61. Fabrication of curved sub-micron Si structures by a combination of anisotropic etching using surfactant-added TMAH solution and FIB direct-drawn mask
  62. The MEMS four-leaf clover wideband vibration energy harvesting device: design concept and experimental verification
  63. Method for quick prediction of windage power loss
  64. Reliability characterization of a soot particle sensor in terms of stress- and electromigration in thin-film platinum
  65. A directly stackable microsystem onto the cultured cells for cytotoxicity tests
  66. Excitation pulse shape effects in drop test simulation of the actuator arm of a hard disk drive
  67. Embedding conductive patterns of elastomer nanocomposite with the assist of laser ablation
  68. A novel uncooled thermal imaging sensor using MEMS transistor
  69. Dew point and relative humidity measurement using a quartz resonant sensor
  70. RF-MEMS switch actuation pulse optimization using Taguchi’s method
  71. Linear and non-linear behavior of mechanical resonators for optimized inertial electromagnetic microgenerators
  72. Experimental study of slider–lubricant interaction with different slider designs
Search Result: