Temperature Control Method of Hard Disk Drives With TuMR Head

2006 ◽  
Author(s):  
J. Lee ◽  
J. Yun
Keyword(s):  
Temperature Control ◽  
Control Method ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives

DSP Implementation of a Direct Adaptive Feedforward Control Algorithm for Rejecting Repeatable Runout in Hard Disk Drives

2016 ◽  
Author(s):  
Jinwen Pan ◽  
Prateek Shah ◽  
Roberto Horowitz
Keyword(s):  
Digital Signal Processor ◽  
Control Method ◽  
Feedforward Control ◽  
Hard Disk Drives ◽  
Digital Signal ◽  
Hard Disk ◽  
Disk Drives ◽  
Bit Patterned Media ◽  
Dsp Implementation ◽  
Adaptive Feedforward

A direct adaptive feedforward control method for tracking repeatable runout (RRO) in bit patterned media recording (BPMR) hard disk drives (HDD) is proposed. The technique estimates the system parameters and the residual RRO simultaneously and constructs a feedforward signal based on a known regressor. An improved version of the proposed algorithm to avoid matrix inversion and reduce computation complexity is given. Results for both MATLAB simulation and digital signal processor (DSP) implementation are provided to verify the effectiveness of the proposed algorithm.

Flying Height Control for a 2-DOF Tripad Slider in Hard Disk Drives With Switched Regulator

2005 ◽  
Author(s):  
Zhizheng Wu ◽  
Foued Ben Amara
Keyword(s):  
Control Method ◽  
Hard Disk Drives ◽  
Surface Profile ◽  
Hard Disk ◽  
Disk Surface ◽  
Switched System ◽  
Flying Height ◽  
Disk Drives ◽  
The Stability ◽  
Adaptive Regulator

Maintaining a constant small flying height of the read/write head is an important target in the design of the ultra high storage density hard disk drives. One effective way to achieve this goal is to use a feedback regulator to suppress the flying height variations. For low flying heights, the read/write head enters into intermittent contact with the disk surface, which results in a switched system regulation problem. In this paper a new control method is proposed to maintain the flying height at its desired value based on the switched system models, despite the unknown microwaviness in the disk surface profile and the unpredictability in the switching times. First, a switched system model is constructed. Then, a Q parameterized set of switched regulators is constructed and the stability of the resulting switched closed loop system is analyzed. Online adaptive regulator tuning is then performed by adjusting the Q parameter in the controller to achieve regulation. Simulation results are presented to illustrate the effectiveness of the proposed method.

scholarly journals Examining the feasibility of the urban mining of hard disk drives

2020 ◽  
Vol 248 ◽  
pp. 119216
Author(s):  
Laura Talens Peiró ◽  
Alejandra Castro Girón ◽  
Xavier Gabarrell i Durany
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Urban Mining

scholarly journals Evaluation of Vibration Characteristics of Suspensions for Hard Disk Drives and Reducing the Vibration by Using Viscoelastic Dampers.

2002 ◽  
Vol 68 (667) ◽  
pp. 720-727 ◽  
Author(s):  
Hiromitsu MASUDA ◽  
Toshihiko SHIMIZU ◽  
Mikio TOKUYAMA ◽  
Haruhide TAKAHASHI ◽  
Kousaku WAKATSUKI ◽  
...  
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Vibration Characteristics ◽  
Disk Drives ◽  
Viscoelastic Dampers

Feasibility study of thermal positioning control actuator for hard disk drives

2012 ◽  
Vol 18 (9-10) ◽  
pp. 1383-1388 ◽  
Author(s):  
Masaru Furukawa ◽  
Junguo Xu ◽  
Jin Liu ◽  
Jianhua Li ◽  
Shoya Nosaki ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Positioning Control

Analysis of Electrical Resonance of a Hard Disk Drives Suspension Interconnect and Invasion Into Read Signal Path

2014 ◽  
Vol 50 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Nobumasa Nishiyama ◽  
Yuji Soga ◽  
Kazuniro Nagaoka ◽  
Tomohisa Okada ◽  
John T. Contreras ◽  
...  
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Electrical Resonance ◽  
Signal Path ◽  
Read Signal
Sign in / Sign up

Export Citation Format

Share Document