H∞ disturbance observer design for high precision track following in hard disk drives

2009 ◽  
Vol 3 (12) ◽  
pp. 1591-1598 ◽  
Author(s):  
C.K. Thum ◽  
C. Du ◽  
E.H. Ong ◽  
B.M. Chen ◽  
F.L. Lewis
Keyword(s):  
High Precision ◽  
Disturbance Observer ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Observer Design ◽  
Disk Drives

Direct Adaptive Disturbance Observer Design for Rejecting the Narrow-Band Disturbance With Unknown Frequency in Hard Disk Drives

2009 ◽  
Author(s):  
Qixing Zheng ◽  
Masayoshi Tomizuka
Keyword(s):  
Disturbance Observer ◽  
Narrow Band ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drive ◽  
Observer Design ◽  
Disk Drives ◽  
Optimal Value ◽  
Band Pass ◽  
Servo Controller

This paper presents an adaptive add-on compensator to handle a single narrow-band disturbance with unknown frequency in hard disk drives (HDDs). A disturbance observer (DOB) loop with a narrow band pass Q filter is built around the baseline servo controller to reject the narrow-band disturbance. The frequency parameter of the Q filter is directly adapted to the optimal value in the sense of minimizing the track following track mis-registration (TMR). The performance of the proposed compensator is demonstrated by simulation on an open-source realistic hard disk drive system.

scholarly journals Optimal Disturbance Observer Design for High Tracking Performance in Motion Control Systems

Mathematics ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1633
Author(s):  
Wonhee Kim ◽  
Sangmin Suh
Keyword(s):  
Disturbance Observer ◽  
Closed Loop ◽  
Inverse Dynamics ◽  
Hard Disk Drives ◽  
Observer Design ◽  
Disk Drives ◽  
Closed Loop Systems ◽  
Baseline Weight ◽  
The Stability ◽  
Target Plant

In this paper, a stability-driven optimal disturbance observer (DO) is proposed. The proposed method does not require any plant inverse dynamics to detect introduced disturbances or a stabilizing Q filter. It does not require additional compensators to resolve causality problems, due to the relative degree, or filters to solve instability problems of non-minimum phase plants. Using this method enables wideband and narrowband disturbances to be attenuated by simply multiplying the corresponding peak filters by the baseline weight function. Furthermore, the proposed DO guarantees the stability of closed-loop systems because the already designed outer-loop systems are considered as a target plant to be stabilized and because of the Lyapunov stability-based H∞ control. In the application example, it was confirmed that the proposed method is effective, and the position error signals were improved by 20.9% in commercial hard disk drives and 36.6% in optical image stabilization systems.

scholarly journals High Precision Positioning Control for Hard Disk Drives

2005 ◽  
Vol 125 (12) ◽  
pp. 1069-1075 ◽  
Author(s):  
Motohiro Kawafuku ◽  
Kazuhiro Otsu ◽  
Makoto Iwasaki ◽  
Hiromu Hirai ◽  
Masahito Kobayashi ◽  
...  
Keyword(s):  
High Precision ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Precision Positioning ◽  
Positioning Control

High-precision positioning control for hard disk drives: 1st report: High-precision simulator using differential iteration method

2007 ◽  
Vol 159 (1) ◽  
pp. 54-61 ◽  
Author(s):  
Motohiro Kawafuku ◽  
Kazuhiro Otsu ◽  
Makoto Iwasaki ◽  
Hiromu Hirai ◽  
Masahito Kobayashi ◽  
...  
Keyword(s):  
High Precision ◽  
Iteration Method ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Precision Positioning ◽  
Positioning Control

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
Sign in / Sign up

Export Citation Format

Share Document