Patent ID: 6744591
Filing Date: 2004-06-01
Classification: G11B

Abstract:
A positioning control method for use in a positioning control mechanism comprising:determining a position error signal from a controlled object, a target position signal of said controlled object and a position detection signal of said controlled objects; applying the position error signal to a phase compensator; and delivering an output signal of said phase compensator to said positioning control mechanism provided with said controlled object so as to perform positioning of said controlled object, wherein, in a power spectrum density of a state quantity of said controlled object during movement of said controlled object from the present position to a target position, a target state quantity orbit is set such that power corresponding to a specified resonance frequency of said positioning control mechanism is reduced, a drive signal for said controlled object is generated from said target state quantity orbit by using an inverse model of said positioning control mechanism, said drive signal is inputted to a controlled object model having, in combination, a rigid body model and a resonance model of said positioning control mechanism to generate an orbit of a new target position, a difference signal between the present position value of said controlled object and the new target position orbit is inputted to said phase compensator, and a result of addition of an output of said phase compensator and said drive signal is used as a signal for driving said controlled object to carry out position control of said controlled object.