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마이크로 광디스크 드라이브용 4 × 1 근접장 탐침 어레이를 위한 슬라이더와 서스펜션의 설계
홍어진(Hong, Eo-Jin),정민수(Jung, Min-Su),오우석(Oh, Woo-Seok),박노철(Park, No-Cheol),양현석(Yang, Hyun-Seok),박영필(Park, Young-Pil) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.2
The near-field scanning micro scope (NSOM) technique is in the spotlight as the next generation storage device. Many different types of read/write mechanism for NSOM have been introduced in the literature. In order for a near-field probe to be successfully implemented in the system, a suitable slider and suspension are needed to be properly designed. The optical slider is designed considering near-filed optics and probe array. The suspension generally supports slider performance, and tracking servo capacity in HDD. Moreover, the suspension for optical slider also should meet the optical characteristics, and is also required to satisfy shock performances for the mobility for the actuator. In this study, the optical slider and the suspension for near-field probe array are designed and analyzed.
Controller Design of Piezoelectric Milliactuator for Dual Stage System
홍어진(Hong, Eo-Jin),박노철(Yang, No-Cheol),양현석(Park, Hyun-Seok),박영필(Park, Young-Pil) 한국소음진동공학회 2003 한국소음진동공학회 논문집 Vol.13 No.12
To reach high areal density, less track pitch is expected and more servo bandwidth is required. One approach to overcoming the problem is by using dual stage servo system. For this system. we have suggested new milliactuator based on the shear mode of piezoelectric elements to drive the head suspension assembly. In this paper, we introduce milliactuator and controller design method, PQ method. PQ method reduces the controller design problem for DISO (dual-input/single-output) systems to two standard controller design problems for SISO ( single-input/single-output) problems. The first part of PQ method directly addresses the issue of actuator output contribution, and the second part allows the use of traditional loop shaping to achieve the overall system performance. This paper shows how to employ the PQ method to meet aggressive close-loop performance specifications for a disk drive system with a VCM and piezoelectric milliactuator.
HDD 액추에이터의 스웨이징성능향상을 위한 베이스플레이트 최적설계
이행수(Haeng-Soo Lee),홍어진(Eo-Jin Hong) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.8
In the manufacturing process of HDD, ball swaging method is commonly used to joint the Head Gimbal Assembly(HGA) with the arm of the actuator. The hub on the HGA is placed into the hole of the actuator arm, and the hub and arm is bonded by the pressure of steel ball. The pressure for plastic deformation on the baseplate causes the undesirable deformation on HGA, such as tilting, flying height change of head. After obtaining the key parameters that have large sensitivity on the swaging process, the optimal shape of baseplate is proposed to increase the static performance during swaging process. Contribution of the proposed design for the swaging performance is verified by contact simulation with elasto-plastic deformation.
HDD Actuator의 Swaging성능향상을 위한 Baseplate최적설계
이행수(Haeng-Soo Lee),홍어진(Eo-Jin Hong) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
In the manufacturing process of HDD, ball swaging method is commonly used to joint the Head Gimbal Assembly(HGA) with the arm of the actuator. The boss on the HGA is placed into the hole of the actuator arm, and the boss and arm is bonded by the pressure of steel ball. The pressure for plastic deformation on the boss causes the undesirable deformation on HGA, such as tilting, flying height change of head. After obtaining the key parameters that have large sensitivity on the swaging process, the optimal shape of baseplate is proposed to increase the static performance during swaging process. Contribution of the proposed design for the swaging performance is verified by contact simulation with elasto-plastic deformation.