Patent ID: 7457076
Filing Date: 2008-11-25
Classification: G11B

Abstract:
1. A head seek control method comprising: accelerating a head with an acceleration signal for an allowable maximum acceleration of an actuator; switching the acceleration signal to a deceleration signal at a point of time when deceleration estimated from the acceleration, velocity, and position estimated from a monitored position of the head reaches an allowable maximum level; decelerating the head with the deceleration of the actuator; and switching the deceleration signal to a settling signal at a point of time when the head may reach a target position within the shortest period of time; inputting an output from the FIR filter to an actuator model; computing a difference between an output from the actuator model and a position signal read by a position signal read section via the head and inputting the difference into a feedback controller; and zeroing an input to the FIR filter at a point of time when the settling is started; wherein the settling signal is used to move the head to a target track; wherein each of the signals is a signal having a waveform smoothed by a filter; wherein the filter is a finite impulse response (FIR) filter.