Vibration Control of Hard Disk Drive with Smart Structure Technology for Improving Servo Performance

In hard disk drives, vibration suppression is very important to boost the servo performance for achieving the enhanced density of the disk and following precision of the system, It has been expected that technology of smart structure will contribute to the development of small and light-weight mechatronics devices with the required performance. This study proposes a new vibration control mechanism with smart structures technology in order to achieve significant vibration suppression in hard disk drive systems, First, modeling of the system is conducted with finite element and modal analyses. Next, the control system design and closed-loop simulation are performed with the proposed vibration control mechanism composed of piezoelectric sensors and actuators. Finally, a multidisciplinary design optimization on actuator location and control system is examined to enhance the closed-loop performance of the system.