Design of suspension and swing arm for improved shock resistance in the micro optical disk drives

Hong, Ji Youn; Oh, Sung‐Yong; Park, C.; Yang, Shuyi; Park, P.

doi:10.1007/s00542-005-0609-2

Cited by 5 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The roots of the first term in the denominator of equation ( 26) are the same as those in equation (13). Accordingly, the resonant frequencies obtained from equation (26) are similar to equation (12). Dealing with the first term in the numerator of equation ( 26) leads to an anti-resonant frequency, i.e.…”

Section: Tracking Motion In the Presence Of Disturbance Forcementioning

confidence: 91%

See 1 more Smart Citation

A tracking motion approach for a piezotube actuator in a disk drive subject to disk deformation and disturbance

Chang¹,

Liu²,

Tang³

2007

Smart Mater. Struct.

View full text Add to dashboard Cite

This study investigates the disk drive dynamics when a disk surface deforms and a disturbance force is exerted on a pickup head in near-field optical disk drives. Serving as an actuator, a piezotube is connected to the suspension of the pickup head. A model is constructed to investigate the pickup head dynamics. Equations of motion for focusing and track-following are derived in the presence of disk surface deformation and the disturbance force on the pickup head. A proportional and derivative control method is carried out in numerical examples. There exists a critical proportional gain that influences the number of resonances in the frequency spectra. Numerical results show that there is only one resonance or none in the frequency spectra when the proportional gain is larger than the critical proportional gain. Hence, the tracking error ratio becomes smaller than one within a wide frequency range, if few resonances appear in the frequency spectra.

show abstract

Section: Tracking Motion In the Presence Of Disturbance Forcementioning

confidence: 91%

“…Kim et al [11] designed a small optical flying head and investigated its flying stability and disk durability. Hong et al [12] investigated the dynamics of the head-disk assembly for small form factor optical disk drives. Kim et al [13] presented the flying stability of optical flying heads during loading/unloading.…”

Section: Introductionmentioning

confidence: 99%

A tracking motion approach for a piezotube actuator in a disk drive subject to disk deformation and disturbance

Chang¹,

Liu²,

Tang³

2007

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…Each mechanical part is designed to satisfy the requirements of the servo control performance and dynamic characteristics. 6,7) To maximize the seesaw actuator driving force, a magnetic circuit with a fan-shaped magnet was suggested for the voice coil motion. A combination of three fan-shaped magnets and a ring tracking yoke was used in the actuator magnetic circuit.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Seesaw Swing Arm Actuator Design for Small Form Factor Optical Disk Drive

Chou

Lin

Cheng

2010

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Many small form factor (SFF) optical pickup heads based on the swing arm design utilize a piezoelectric material or the slim metal plate to perform the focusing action. The seesaw-type actuator is a new mechanism used in the focusing action for SFF optical data storage devices. The swing arm nutates along a pivot instead of a hinge in the vertical movement. In this paper, an optimized design of a biaxial voice coil motor (VCM), in which the tracking and focusing VCMs are combined in the rear of the swing arm, is proposed. Simulation and experiment results demonstrate the effectiveness of the proposed design methodology by showing that the stress magnitude distribution characteristics, mechanism stiffness, and driving stability of the optimized design are enhanced in comparison with those of the original.

show abstract

Design of swing arm type actuators considering thermal and dynamic characteristics

et al. 2006

View full text Add to dashboard Cite

The present state of the design of swing arm actuators for optical disc drives is to obtain the highly efficient dynamic characteristics within a very compact volume. As a necessary consequence, the need of the small form factor (SFF) storage device has arisen as a major interest in the information storage technology. Due to the size constraint, the thermal stability of the optical pick-up head is important: therefore, the actuator is designed to emit the heat, which is generated by the optical pick-up, along the structural body easily. In this paper, we suggest the miniaturized swing arm type actuator that has effective heat emission quality as well as satisfies the dynamic requirements for the SFF optical disk drive (ODD). The actuator is targeted to be installed in CF-II card size drive to be competitive with flash memory or mini hard disk drive used in mobile electric devices; therefore the dimension of the actuator is required as 11.0 mm · 2.5 mm · 25.0 mm (width · height · length). Because of its small size, the dynamic requirements are severe to ensure the enough gain-margin for the system control together with satisfying the DC/AC sensitivity conditions. Moreover, due to the small size, the maximum pick-up temperature is critical in design because the system has high possibility to reach the shut-down temperature. For the operating mechanism, it uses a tracking electromagnetic (EM) circuit for the focusing motion together and the initial model is designed and promoted by the design of experiments (DOE) only considering the dynamic characteristics. New concept design is suggested based on the topology optimization method considering the thermal conductivity. Furthermore, the new design is modified by DOE to maintain the high sensitivity and to have wide control bandwidth and decreasing mass and inertia. The final design of a swing arm type actuator for SFF ODD is suggested and its dynamic characteristics are verified.

show abstract

Design of suspension and swing arm for improved shock resistance in the micro optical disk drives

Cited by 5 publications

References 7 publications

A tracking motion approach for a piezotube actuator in a disk drive subject to disk deformation and disturbance

A tracking motion approach for a piezotube actuator in a disk drive subject to disk deformation and disturbance

Optimization of Seesaw Swing Arm Actuator Design for Small Form Factor Optical Disk Drive

Design of swing arm type actuators considering thermal and dynamic characteristics

Contact Info

Product

Resources

About