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공기 베어링 효과를 고려한 HDD 서스펜션 시스템의 트랙탐색 동특성
김정주,박노열,강태식,정태건,Kim, Jeong-Ju,Park, No-Yeol,Gang, Tae-Sik,Jeong, Tae-Geon 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.2
Recently, almost all hard disk drives employ the rotary actuator system. The performance of an HDD depends on the accuracy and speed of tracking motion. We study the dynamics of head-suspension assembly during track seek. We develop the numerical analysis program to study the dynamic characteristics of HDD suspension system considering the air bearing effects. The track seek simulation by using the developed program helps to estimate the effect of the suspension vibration on the air bearing dynamics. We calculate the behaviour of the air bearing for the given track seek profile and calculate the positioning error during track seek process due to the lateral deflection of the suspension.
권순억,박노열,김준오,정태건,Gwon, Sun-Eok,Park, No-Yeol,Kim, Jun-O,Jeong, Tae-Geon 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.12
We obtain the mathematical model of the hard disk drive actuator system the system response data of the finite element analysis or experimental results. The model is base on the Rayleigh-Ritz method to approximate the dynamic response of the actuator system. The basic idea is to use the curve-fit technique to obtain the approximation coefficients. It allows the dynamic analysis of the actuator system without resort to the repetitive finite element modeling work. Even though the dynamic characteristics of the system of the system are affected somewhat by the structural modification and the change of the material properties, we can use the modified size and dynamic properties of the actuator system in the mathematical model to some extent. In this study, we express the mathematical model of the simplified rectangular plate first and then proceed to the actual hard disk drive actuator system.
부상특성 향상을 위한 극소 공기윤활막을 지닌 헤드 슬라이더의 형상 최적 설계
강태식,최동훈,정태건,박노열,이성창,Gang, Tae-Sik,Choe, Dong-Hun,Jeong, Tae-Geon,Park, No-Yeol,Lee, Seong-Chang 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.4
Flying attitudes of the slider, which are flying height, pitch and roll, are affected by the air flow velocity, the skew angle, and the manufacturing tolerances. Traditional designs of the air bearing surface have considered only the flying performances for the variations in the air flow velocity and the skew angle, which are determined by the radial position. In this study, we present the new shape design of the air bearing surface by considering the track seek performance and the air bearing stiffness as well as the traditional design requirements. The optimization technique is used to improve the dynamic characteristics and operating performance of the newly proposed air bearing surface shape design further. The optimized configuration is obtained automatically and the optimally designed sliders show the enhanced flying and dynamic characteristics.