Adaptive settling control method and apparatus in track seek mode of disc drive
AssigneeSamsung Electronics Co., Ltd.
InventorsSang-eun Baek, Jun-seok Shim, Chang-ik Kang
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Abstract
A settling control method and apparatus perform an improved settling control regardless of a seek distance when a disc drive track seek control operation is performed. An adaptive settling control method used in controlling the track seek mode of the disc drive includes: controlling a head to converge into a target position and a target velocity along with an eigen vector by transiting an initial state of the head motion onto an eigen vector line of a system at the time transiting from an acceleration/deceleration control mode of the track seek mode to a settling control mode.
Claims9
An adaptive settling control method in a track seek mode of a disc drive for use in controlling the track seek mode of the disc drive, the method comprising:
- controlling a head to converge to a target position and a target velocity along an eigen vector by transiting an initial state of head motion onto a system eigen vector line corresponding to the eigen vector at the time of transiting from an acceleration/deceleration control mode of the track seek mode to a settling control mode.
An adaptive settling control apparatus for use in a track seek mode of a disc drive in a track seek control apparatus of the disc drive, the apparatus comprising:
- a state estimator configured to estimate a state information value including head position, velocity, and control input information from a position error signal;
- a state feedback controller configured to generate state feedback control information obtained by multiplying the state information value by a predetermined state feedback gain;
- a single mode control circuit configured to generate initial state compensation information obtained by multiplying a state information initial value at a time at a beginning of a settling control mode by a predetermined square matrix for transiting an initial state of head motion at the beginning of the settling control mode onto a system eigen vector line;
- a summing unit adding the initial state compensation information to a negative value of the state feedback control information;
- and
- a voice coil motor (VCM) driver & actuator moving a head by generating a driving current corresponding to an output of the summing unit and generating the position error signal.
Dependencies are inferred from the claim text.