Patent ID: 6064540
Filing Date: 2000-05-16
Classification: G11B

Abstract:
An active control mechanism for stabilizing an actuator system having an arm assembly, a controlled element mounted on said arm assembly and generating a position signal indicating a displacement of said controlled element, an actuator for moving said controlled element by moving said arm assembly, said arm assembly experiencing vibrational modes, said active control mechanism comprising:a) a sensing means attached to said actuator for generating signals correlated to said vibrational modes;b) a control means connected to said sensing means for deriving from said signals an adjustment signal comprising:1) a stiffening correction;2) an active damping correction;3) an inertia reduction correction; andc) a combining element connected to said control means, to said controlled element and to said actuator for combining said adjustment signal and said position signal to produce a feedback signal for driving said actuator.