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Motion Control of Non-Contact Start/stop Hard Disk Drive Using Shape Memory Alloy Actuator

형상기억합금 작동기를 이용한 비접촉 시동 및 정지형 하드디스크 드라이브의 운동제어

  • Published : 2002.01.01

Abstract

In this work, we propose a new type of HDD suspension featuring shape memory alloy (SMA) actuator in order to prevent the contact between the slider and disk. The principal design parameters are obtained from the modal analysis using finite element analysis, and then the dynamic model is established to formulate the control scheme for Non-Contact Start/stop mode drive. Subsequently, a robust H$\_$$\infty$/ control algorithm is designed by integrating experimentally-Obtained SMA actuator dynamics to the proposed HDD suspension system. The controller is empirically realized and control results for the load/unload profiles are presented in time domain. In addition, the contact signal between the slider and disk is measured by the electrical resistance method.

Keywords

SMA Actuator;HDD Suspension;Non- CSS Motion;H$_{\infty}$ Controller

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