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Adjusting seek current profile on the fly

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G11B-005/596
출원번호 US-0062835 (2002-01-31)
발명자 / 주소
  • Codilian, Raffi
  • Gibbons, Kent W.
출원인 / 주소
  • Western Digital Technologies, Inc.
대리인 / 주소
    Shara, Esq. Milad G.
인용정보 피인용 횟수 : 59  인용 특허 : 3

초록

A hard disk drive that determines a saturation current of a voice coil motor (VCM) during the acceleration portion of a seek operation, and uses the information to advantageously adjust current profile for subsequent portion of the seek. One example of determining the saturation current is utilizati

대표청구항

1. A hard disk drive comprising:a rotatable disk having a magnetic recording media wherein the rotatable disk defines a plurality of concentric servo tracks;a pivotable actuator that is movable with respect to the rotatable disk;a transducer disposed on the actuator so as to be movable with respect

이 특허에 인용된 특허 (3)

  1. Green Martin R. (Rochester MN) Stephenson John J. (Rochester MN) Stich Michael C. (Rochester MN), Method and apparatus for performing a seek.
  2. Codilian Raffi ; Nguyen David Dung Tien, Method for seek time optimization employing voice-coil motor current saturation level to define an adaptive deceleration.
  3. Galloway Paul A., Servo control system and method for a data storage device with improved braking.

이 특허를 인용한 특허 (59)

  1. Zayas,Fernando A.; Chang,Michael, Accurate tracking of coil resistance.
  2. Zayas,Fernando A.; Chang,Michael, Accurate tracking of coil resistance based on current, voltage and angular velocity.
  3. Nguyen, Daniel T.; Sill, Kevin R., Actuator pivot assembly including a bonding adhesive barrier configured to reduce contamination.
  4. Chen, Yih-Jen D.; McNab, Robert J., Apparatus for manufacturing piezoelectric actuators.
  5. Nguyen, Daniel T.; Watson, Scott E.; Liem, Andre Y.; Garbarino, Jonathan M.; Weiher, Joshua P., Coined VCM tab to limit cover deflection under pinch load.
  6. Nicholls, Michael Troy; Xi, Wei; Wan, Jie; Yu, Jie; Xu, Jun; Kastler, Danny J., Data storage device employing spindle motor driving profile during seek to improve power performance.
  7. Tian, Jifang; Li, Hongqi; Flynn, William; Hu, Xiaoping; Obregon, Francisco, Devices and methods for system-level disk drive vibration and shock testing.
  8. Tanner, Brian, Direct detection of coil resistance.
  9. Lee, Yu-Min; Zheng, Hao; Griggs, Ian; Tran, Gregory, Disk drive actuator having a radially stepped pivot bore.
  10. Narayana, Aswartha; Huang, Yanan, Disk drive adjusting state estimator to compensate for unreliable servo data.
  11. Liu, Kexiu; Beker, Orhan; Lou, Mingji, Disk drive employing feed-forward compensation and phase shift compensation during seek settling.
  12. Lou, Mingji; Beker, Orhan; Liu, Kexiu, Disk drive employing model-based feed-forward compensation during seek settling.
  13. Babinski, Alexander; Beker, Orhan; Phan, Duc T.; Brunnett, Donald, Disk drive employing system inversion for tuning seek to settle servo loop.
  14. Mani Biswas, Mousumi, Disk drive filter including fluorinated and non-fluorinated nanopourous organic framework materials.
  15. Gustafson, John R.; Patel, Mukesh, Disk drive having a conformal peripheral foil seal having an opening covered by a central metal cap.
  16. Horasart, Theerapong; Bupphasawan, Meatasit; Chaiboon, Chinorot, Disk drive having a stationary plate between disks with grooves adjacent fastener holes.
  17. Smyth, Nicholas D.; Myers, David K., Disk drive having a top cover channel vented to a central cavity via a hole through a bottom land.
  18. Smyth, Nicholas D.; Myers, David K., Disk drive having a top cover channel vented to a central cavity via a peripheral clearance gap.
  19. Pan, Tzong-Shii; Chen, Yih-Jen Dennis; Shum, Wing Chun, Disk drive head gimbal assembly having a flexure tail with a dielectric layer that has regions of lesser thickness.
  20. Pan, Tzong-Shii; Zhang, Cliff, Disk drive head stack assembly having a flexible printed circuit with bond pads having reduced capacitance.
  21. Chen, Yih-Jen Dennis; Liu, Yanning; Teo, Kia Moh, Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands.
  22. Chen, Yih-Jen Dennis; Liu, Yanning; Teo, Kia Moh, Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands.
  23. Chen, Yih-Jen Dennis; Liu, Yanning; Teo, Kia Moh, Disk drive head suspension tail with ground pad outside of bonding region.
  24. Chen, Yih-Jen D.; Pan, Tzong-Shii, Disk drive head suspension tail with stiffened edge alignment features.
  25. Chen, Yih-Jen D.; Pan, Tzong-Shii, Disk drive head suspension tail with stiffened edge alignment features.
  26. Chen, Yih-Jen Dennis; Pan, Tzong-Shii, Disk drive head suspension with a dual dimple and a flexure tongue with a piezoelectric microactuator.
  27. Kloeppel, Klaus; Ilagan, Ronald G.; Nguyen, Diep L., Disk drive spindle with fluid journal bearing having increased radial clearance in axial end regions.
  28. Pan, Tzong-Shii, Disk drive system.
  29. Parker, Joshua; Petersen, Frederic C.; Couture, Shawn P.; Kuniyil, Prabheesh Balakrishnan; Nykanen, Bob A., Disk drive tolerance ring with edge rounding from opposite major faces.
  30. Sill, Kevin R.; Little, Aaron D., Disk drive with self sealing screw attachment of actuator pivot.
  31. Gustafson, John R.; Patel, Mukesh, Disk drive with slow acting desiccant.
  32. Kloeppel, Klaus, Grooved cylindrical seal with increased radial clearance for reduced cost disk drive spindle.
  33. Le, Lynn Bich-Quy; Hitchner, Thomas J., Hard disk drive enclosure base with a helium sealed gasket.
  34. Le, Lynn Bich-Quy; Hitchner, Thomas J., Hard disk drive enclosure base with feed through flexure design and accompanying flexure.
  35. Shum, Wing Chun; Liu, Yanning; Scura, John E., Head gimbal assembly having a flexure tail with cover layer standoff islands.
  36. Pan, Tzong-Shii; Ho, Shufun, Head stack assembly with a flexible printed circuit having a mouth centered between arms.
  37. Pan, Tzong-Shii, Head suspension having a flexure tail with a covered conductive layer and structural layer bond pads.
  38. Casey, Shawn E.; Tian, Jifang; Campbell, Tegan; Li, Hongqi; Flynn, William, Information storage device with a damping insert sheet between a housing bay and a disk drive.
  39. Hanke, Frederick J., Information-storage device including an oxygen absorbing device.
  40. Davidson, Marc; Myers, David K.; Willis, Terrance J., Magnetic head separator connected to a ramp.
  41. Davidson, Marc; Myers, David K.; Willis, Terrance J., Magnetic head separator fin material to prevent particulate contamination on slider.
  42. Novotny, Vlad; Berding, Keith R., Magnetic recording drives with active photocatalytic filtration.
  43. Sosseh, Raye Abdoulie, Maximizing performance under a power envelope constraint.
  44. Perlas, Joseph A.; Vangal-Ramamurthy, Jambunathan, Method of imbalance correction using a grooved disk clamp.
  45. Pan, Tzong-Shii; Magsombol, Fernando A., Method of manufacturing a disk drive head gimbal assembly having a flexure tail with folded bond pads.
  46. Wang, Zhi; Chen, Jenghung, Performance of a rotary actuator in a disk drive.
  47. Nguyen, Diep L.; Ilagan, Ronald G.; Kloeppel, Klaus, Rotary spindle having a disk clamp bottom land facing and in contact with a shaft top land.
  48. Lee,Jung ho; Chung,Da woon; Lee,Dong wook; Ji,Byoung kul, Seek control method of hard disk drive, recording medium storing method and hard disk drive adopting method.
  49. Watson, Scott E.; Lee, Yau-Shing; Hitchner, Thomas J.; Myers, David K., Slim form factor disk drive comprising disk drive enclosure having an insular raised region.
  50. Davidson, Marc; Krishnan, Varuvadivelan; Tan, Siu Ken; Kok, Kin Lim, Sloping transition on a ramp of a hard disk drive.
  51. Dougherty, Mitchell D., Spindle motor magnet diameter increase above head plane.
  52. Smyth, Nicholas D.; Nguyen, Daniel T.; Myers, David K., Storage device with a cover supporting portion.
  53. Smyth, Nicholas D.; Nguyen, Daniel T.; Myers, David K., Storage device with a cover supporting portion.
  54. Liu, Yanning; Shum, Wing C.; Scura, John E., Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface.
  55. Liu, Yanning; Shum, Wing Chun; Scura, John E., Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface.
  56. Seymour, Mark S.; Dougherty, Mitchell D.; Banshak, Jr., Walter G.; Hales, Geoffrey A., Suspension clamp for clamping a disk drive suspension to an actuator arm.
  57. Tafreshi, Shahriar A.; Lee, Yu-Min, Tamper-evident seals having adhesive-free areas to minimize rework time.
  58. Heo, Baekho; Weiher, Joshua P., Threaded disk clamping element with step on disk contact surface.
  59. Tian, Jifang; Yang, Jian; Yang, Qiang, Ultra-thin HDD embedded disk clamp design.
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