ABSTRACT
The optical disk drive (ODD), which can store and reproduce multimedia information such as audio and video, is a representative information storage device (ISD). Recently, CD-ROM and CD-R/RW classifi ed as a fi rst generation ODD and DVD-ROM/RAM/ RW classifi ed as a second generation ODD have been widely used as a secondary ISD such as computer peripherals. However, they are very sensitive to external vibration or impact because of high storage density and high-speed data transmission [1]. Therefore, it is very important to study the dynamic characteristics and vibration suppression of disk drives to improve the performance of ODD.
