Vibration Reduction of Magnetic in Disk Drive Mechanism : 1st Report., Vibration Reduction of Rotary Actuator Mechanism

Abstract

A magnetic disk drive is excited by an actuator force and a disk driving force. It is shown that vibration reduction results when the actuator force is applied to the rotary access mechanism. A vibration analysis utilizing a building block approach confirms that the carriage assembly structure contributes largely to the vibration characteristics of the access mechanism. The bending resonant frequency in the seek direction is detrimental to high accuracy and high speed head positionings. The relation between the structural stiffness of each element and its vibration characteristics is clarified. High rigidity elements which comprise the carriage assembly structure are investigated and comparative studies on two types of head supporting gimballs are carried out.