High-Speed Precision Motion Control

Chapter 2

System Modeling and Identification

Hiroshi Uchida

Hitachi Global Storage Technologies Japan, Ltd.

Takashi Yamaguchi

Ricoh Company Ltd.

Hidehiko Numasato

Hitachi Global Storage Technologies Japan, Ltd.

2.1  HDD Servo Systems

2.1.1  Inside an HDD

2.1.2  Generation of Servo Position Signal

2.2  TMR Budget Design

2.3  Modeling of HDD

2.3.1  Introduction

2.3.2  Plant Components

2.3.3  Modeling of Mechanical Dynamics

2.4  Modeling of Disturbances and PES

2.4.1  Disturbances and PES

2.4.2  Decomposition of Steady-State PES

2.4.2.1  RRO and NRRO

2.4.2.2  Frequency Spectrum of NRRO

2.4.2.3  Decomposition of NRRO

2.4.3  Decomposition of Transient Response

Bibliography

2.1  HDD Servo Systems

In this section, the Hard Disk Drive (HDD) servo system ...