High-Speed Precision Motion Control

List of Figures

1.1    Schematic apparatus of a commercial HDD

1.2    Trend of areal densities of HDDs

2.1    Basic structure in an HDD

2.2    Read back signal (top) and servo pattern (bottom)

2.3    PES generation using burst signals read from the servo burst pattern

2.4    w – wTMR and w – rTMR

2.5    Basic design flow of HDD head-positioning system

2.6    Error factor during position signal writing

2.7    Error factor of position signal

2.8    Error factor of position signal fluctuation during data reading/writing

2.9    Error factor of head vibration during data reading/writing

2.10  Error factor of tracking error during data reading/writing

2.11  Plant block diagram

2.12  Head-positioning mechanisms in HDDs

2.13  Measured actuator dynamics ...