1st Edition

Hard Disk Drive
Mechatronics and Control




ISBN 9780849372537
Published November 2, 2006 by CRC Press
359 Pages - 250 B/W Illustrations

USD $225.00

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Book Description

The hard disk drive is one of the finest examples of the precision control of mechatronics, with tolerances less than one micrometer achieved while operating at high speed. Increasing demand for higher data density as well as disturbance-prone operating environments continue to test designers' mettle. Explore the challenges presented by modern hard disk drives and learn how to overcome them with Hard Disk Drive: Mechatronics and Control.

Beginning with an overview of hard disk drive history, components, operating principles, and industry trends, the authors thoroughly examine the design and manufacturing challenges. They start with the head positioning servomechanism followed by the design of the actuator servo controller, the critical aspects of spindle motor control, and finally, the servo track writer, a critical technology in hard disk drive manufacturing. By comparing various design approaches for both single- and dual-stage servomechanisms, the book shows the relative pros and cons of each approach. Numerous examples and figures clarify and illustrate the discussion.

Exploring practical issues such as models for plants, noise reduction, disturbances, and common problems with spindle motors, Hard Disk Drive: Mechatronics and Control avoids heavy theory in favor of providing hands-on insight into real issues facing designers every day.

Table of Contents

INTRODUCTION
History of HDD Technology
Components of a Hard Disk Drive
Accessing Data in HDD
Trend in HDD Industry
Alternative Recording Technologies
HEAD POSITIONING SERVOMECHANISM
The Servo Loop
The Actuator
Feedback of Position Signal
High Frequency Dynamics
Noise and Disturbances
Track Seek Controller
DESIGN OF ACTUATOR SERVO CONTROLLER
Review of Design Methods
PID-Type Control
Factors Limiting Servo Performance
Optimal Control
Advanced Topics
Emergence of Dual-Stage Actuator
Control of Dual-Stage Actuator
SPINDLE MOTOR CONTROL
Magnetic Field Fundamentals
Electric Motor Fundamentals
Spindle Motors Used in HDD
Spindle Motor Drive System
SERVO TRACK WRITER
Introduction
HAD Servowriting
Media STW
Self Servowriting
A Laboratory-Scale Example
Printing the Patterns
BIBLIOGRAPHY
INDEX

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