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US20060077588 Generalized sinusoidal trajectory for seek servomechanism of hard drives  
A hard disk drive moves a transducer across a disk surface so that the transducer has an essentially generalized sinusoidal acceleration trajectory. A digital signal processor known as a...
US20080088966 SERVO CONTROL METHOD AND APPARATUS IN SEEK RETRY CONDITION AND DISK DRIVE APPARATUS USING THE SAME  
A servo control method in a seek retry condition includes determining whether the seek retry condition is generated, and terminating a servo control process that is currently performed and...
US20060082922 Trajectories-based seek  
A hard disk drive moves a transducer across a disk surface so that the transducer has an acceleration trajectory, which is symmetric about the midpoint of the curve. A digital signal processor...
US20140198407 MAGNETIC DISK DEVICE AND METHOD OF CONTROLLING MAGNETIC HEADS  
According to one embodiment, a magnetic disk device includes: magnetic heads; a magnetic disk in which servo patterns having different write frequencies from one another are divided and recorded...
US20100079906 Adaptive Feed Forward Rotational Vibration Compensation During a SEEK Operation  
A disk drive assembly includes a disk drive, one or more accelerometers, a control circuit, and an adaptive feed forward circuit. The one or more accelerometers generate acceleration signals that...
US20090067298 REDUCED NOISE SERVO CONTROL  
A servo control system and method is provided, comprising: a controller outputting a parameter control signal; a device having a parameter controlled based on the parameter control signal; a...
US20100142086 METHOD AND APPARATUS FOR CONTROLLING THE EFFECTS OF SEEK-INDUCED VIBRATION OF A COMPONENT PART IN A HARD-DISK DRIVE  
A method for controlling the effects of seek-induced vibration of a component part in a hard-disk drive. The method includes determining a resonant frequency of seek-induced vibration of the...
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