Patent ID: 7248428

Claim:
A method of controlling a track seek of a hard disk drive, which generates a voice coil motor (VCM) driving current using a sinewave acceleration trajectory having a frequency corresponding to a track seek distance, and which applies the VCM driving current through a notch filter to a VCM driver that drives a VCM actuator, the method comprising: measuring a gain distortion and a phase delay caused by the notch filter and the VCM driver with respect to the frequency; expressing the measured gain distortion and the measured phase delay using a complex number; obtaining a new sinewave in which the measured gain distortion and measured phase delay are compensated for by using a sinewave of the frequency and the complex number; generating the VCM driving current using an acceleration trajectory in a form of the new sinewave; and driving the VCM actuator by applying the VCM driving current to the VCM driver through the notch filter.