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File organization (Computer science) --- Hard disks (Computer science) --- Fixed disks (Computer science) --- Hard drives (Computer science) --- Rigid disks (Computer science) --- Magnetic disks --- File management (Computer science) --- File systems (Computer science) --- Organization, File (Computer science) --- Database management --- Electronic data processing

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The second edition of this monograph provides a systematic treatment of the design of modern hard disk drive servo systems updated with the latest research results to reflect recent improvements in spindle speed and bit density and other changes in this fast-moving field. In particular, it focuses on the applications of some newly developed results in control theory, i.e., robust and perfect tracking control and composite non-linear feedback control which are suitable for track following and seeking respectively. Emphasis is placed on hard disk drive servo systems with single- or dual-stage actuation using a voice-coil-motor actuator enhanced in the latter case by the addition of a micro-actuator providing faster responses and therefore higher bandwidth in track following. Other issues such as modeling and compensation of nonlinearities and friction in microdrives, disturbance rejection and resonance compensation are also addressed. The techniques and applications involved include: • time- and frequency domain methods for system identification; • physical effect approaches for parameter identification; • linear systems tools; • linear control techniques (PID, H2, H-infinity, and other robust control methods); • classical nonlinear control techniques (time-optimal, proximate time-optimal, and mode switching control); • composite nonlinear feedback (CNF) control; • complete single- and dual-stage hard disk drive servo systems; • time- and frequency domain properties of hard disk drive servo systems; • design of piezoelectric actuator systems; • modeling and compensation of nonlinearities and friction in microdrives. Hard Disk Drive Servo Systems will be of great value to practicing engineers in the hard disk and CD-ROM drive industries and to researchers in areas related to servo systems. The Linear Systems and CNF MATLAB® toolkits used to develop many of the results in this book can be downloaded from Professor Chen’s website. Advances in Industrial Control aims to report and encourage the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.

Servomechanisms. --- Data disk drives --- Hard disks (Computer science) --- Design. --- Fixed disks (Computer science) --- Hard drives (Computer science) --- Rigid disks (Computer science) --- Magnetic disks --- Disk drives, Data --- Computer input-output equipment --- Magnetic memory (Computers) --- Servo-mechanisms --- Servomotors --- Servo systems --- Servos (Servomechanisms) --- Automatic control --- Automation --- Feedback control systems --- Synchros --- Computer hardware. --- Information storage and retrieva. --- Operating systems (Computers). --- Control and Systems Theory. --- Computer Hardware. --- Information Storage and Retrieval. --- Mechatronics. --- Performance and Reliability. --- Information storage and retrieval. --- Computer operating systems --- Computers --- Disk operating systems --- Systems software --- Operating systems --- Information storage and retrieval systems. --- Automatic data storage --- Automatic information retrieval --- Automation in documentation --- Computer-based information systems --- Data processing systems --- Data storage and retrieval systems --- Discovery systems, Information --- Information discovery systems --- Information processing systems --- Information retrieval systems --- Machine data storage and retrieval --- Mechanized information storage and retrieval systems --- Computer systems --- Electronic information resources --- Data libraries --- Digital libraries --- Information organization --- Information retrieval --- Control engineering. --- Computer software—Reusability. --- Mechanical engineering --- Microelectronics --- Microelectromechanical systems --- Control engineering --- Control equipment --- Control theory --- Engineering instruments --- Programmable controllers