公开(公告)号：SG83193A1

公开(公告)日：2001-09-18

申请号：SG200001268

申请日：2000-03-08

Applicant: IBM

Inventor： FU-YING HUANG ,  WAYNE ISAMI AMAINO ,  JIANN-CHANG LO ,  MATTHEW T WHITE

IPC: G11B5/48 ,  G11B33/08 ,  G11B21/02

Abstract: A disk drive having an arm assembly equipped with a primary actuator such as a VCM and a mode-canceling actuator such as a PZT mounted at a location selected in such a way that the strain in the mode-canceling actuator is in phase with sway deformations of the primary actuator produced by the vibrational modes of the arm assembly. The primary actuator is driven to exert a primary force,on the arm assembly while the secondary driver ensures that the mode-canceling actuator applies a mode-canceling force,on arm assembly such that the gain and phase of one or more vibrational modes are canceled.