Patent ID: 6445650
Filing Date: 2002-09-03
Classification: G11B

Abstract:
A high-speed dynamic actuating system for optical disks, with the high-speed dynamic actuation characteristics of the lens fitting to the pre-determined velocity curve, comprising:a first gain and a second gain, coupled to a summing element, outputting a TRO signal to said pick-up head of an optical disk drive for controlling the relative velocity of the lens to said pick-up head; a sledge controller, connected to a sledge motor of an optical disk drive for controlling the relative velocity of said pick-up head to the ground; a track number counter, connected to the output of said pick-up head for counting the number of tracks; a velocity estimater, connected to said track number counter for performing estimation of the velocity of said pick-up head; and a velocity curve fitting circuit, connected to said velocity estimater for fitting the velocity of said pick-up head to the pre-determined velocity curve; with both the outputs of said velocity estimater and said velocity curve fitting circuit connected to perform calculation by a summing element, and then delivered to both the input of said lens controller and the input of said sledge controller, so as to form a closed feedback loop.