Advance servo control for hard disk drive in mobile application

... literally Finally, I wish to thank the following colleagues: Linlin Thi (for her patience and hardworking in developing hardware and firmware for the experiment setup together with me), Dr Chunling Du ... Pseudo-sine Current Profile for Smooth Seeking Hard disk drive is widely used in consumer electronics where acoustic noise is becoming a more important performance index Quiet s...

Ngày tải lên: 15/09/2015, 21:16

... The disk is mounted through a hole at the center on the spindle of a motor for spinning of the disks The data are recorded on a continuously spinning disks which are made of aluminum or glass and ... used in high performance hard disk drives in which the spindle speed is around 10,000 RPM or more Many models of hard disk drives for the desktop and mobile environmen...

Ngày tải lên: 16/10/2015, 15:38

... Problem Instances For Hard- Disk Drive Build -Planning Problem 123 6.2 Computational Results For Hard- Disk Drive Build -Planning Problem 125 6.3 CPU time (s) For Hard- Disk Drive Build -Planning Problem ... v List of Figures 3.1 Shortest Path Network for Hard- Disk Drive Production Planning 46 3.2 Multicommodity Network for Hard- Disk Drive Production...

Ngày tải lên: 15/09/2015, 21:48

... ROBUST DESIGN OF MINIATURISED SPINDLE MOTORS FOR HARD DISK DRIVE GAO XIAN KE (M.Eng, B.Eng) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ELECTRICAL AND ... application of robust design in hard disk drive industry As the objective of the research is to formulate effective robust design approaches systematically for the...

Ngày tải lên: 17/09/2015, 17:20

... track-following servo in the hard disk drives Our concern is to increase the servo bandwidth of the hard disk drive systems via the optimal control methods Since the dual stage actuator structure is another ... developed control methods in the hard disk servo to meet the higher performance requirement The dual-stage actuator is considered as ano...

Ngày tải lên: 17/09/2015, 17:17

... the first hard disk with 1.8 platters, later used for PC-card disk drives F IRST 1.3 FORM FACTOR DISK DRIVE (1992): Hewlett Packard’s C3013A is the first 1.3 drive F IRST HIGH GB DISK DRIVE (1993): ... Engineering Drive Singapore 117608 British Library Cataloguing in Publication Data Hard disk drive servo systems - 2nd ed - (Advances in industrial control) 1.Servomecha...

Ngày tải lên: 14/12/2013, 19:15

... section will be utilized heavily in later chapters to solve track-following problems in hard disk drive servo systems 3.6.1 Continuous-time Systems Consider the following continuous-time system: ... the imaginary axis We believe that such a condition is always satisfied for most HDD servo systems However, most servo systems can be represented as certain chains of integrators and th...

Ngày tải lên: 14/12/2013, 19:15

... switching Moreover, the RPT controllers in a track-following servo have been proved to be robust against resonance mode changes from disk to disk and work well against runout disturbances The MSC law ... the plant to be controlled even for a small error Moreover, this algorithm is not suited for disk drive applications for the following reasons: even the smallest system process or m...

Ngày tải lên: 14/12/2013, 19:15

... generated by the data flex cable in the drive The high-frequency resonance modes of the microdrive as given in Chapter are included in simulation For hard disk drive servo systems, the task of the controller ... control toolkit using a practical example on a micro hard disk drive (HDD) servo system design The following dynamical model of an IBM microdrive (DMDM-10340) has bee...

Ngày tải lên: 14/12/2013, 19:15

... order of a few nanometers The servo bandwidth of the current disk drive actuators makes it very hard to achieve this The VCM actuator used in conventional disk drives has hundreds of flexible ... Trackfollowing servo systems have to ensure that the PES is kept to a minimum Having deviations that are above the tolerance of the disk drive would result in too many read or write er...

Ngày tải lên: 14/12/2013, 19:15

... Modeling and Design of a Microdrive System 9.1 Introduction Chapters to focus on the design of single- and dual-stage actuated hard drive servo systems The hard drives considered are those used ... as the VCM driver The VCM actuator is designed to position the R/W head fast and precisely 246 Modeling and Design of a Microdrive System onto the target track, and is driven by a VCM drive...

Ngày tải lên: 14/12/2013, 19:15

... application to hard disk drive servo system Proc 6th Int Workshop Adv Motion Contr; Nagoya, Japan; 2000 p 246–51 Hara S, Hara T, Yi L, Tomizuka M Two degree-of-freedom controllers for hard disk drives ... to hard disk drives Proc 1999 IEEE Int Conf Contr Appl; Kohala Coast, HI; 1999 p 170–5 13 Wang L, Yuan L, Chen BM, Lee TH Modeling and control of a dual actuator servo syst...

Ngày tải lên: 14/12/2013, 19:15

... control for hard disk dual-stage servo systems IEEE Trans Magn 2001; 37:949–54 161 Li Y, Horowitz R Track-following controller design of MEMS based dual-stage servos in magnetic hard disk drives Proc ... for fast and precise servo system of hard disk drives Proc 6th Int Workshop Adv Motion Contr; Nagoya, Japan; 2000 p 69–73 146 Tsuchiura KM, Tsukuba HH, Toride HO, Takahashi T...

Ngày tải lên: 14/12/2013, 19:15

... the electromagnetic forces are extremely stringent Electromagnetic forces such as the cogging torque and unbalanced magnetic pull (UMP) generated in the permanent magnet spindles are of great concerns ... Modeling and Analysis of PM Brushless DC Motors 2.1 Electromagnetic Field in PM Brushless DC Motors In order to study the electromagnetic forces and t...

Ngày tải lên: 15/09/2015, 22:03

... diagram of the hard disk drives [9] A brief description of each of the components of the disk servo loop is presented in the following section [10] Fig.2.3 Block diagram of hard disk drive • Disks ... Historic improvement in hard disk storage cost…………………………23 2.2 Disk drive data rate …………………………………………………… 24 2.3 Block diagram of hard disk drive ………………………………...

Ngày tải lên: 17/09/2015, 17:20