scholarly journals Shock pulse width effects in operational drop test simulation of a small form factor disk drive with sub-10 nm air bearing slider

2009 ◽  
Vol 2 (1) ◽  
pp. 13-17
Author(s):  
Bin Gu ◽  
Dongwei Shu ◽  
Yusaku Fujii ◽  
Koichi Maru ◽  
Baojun Shi ◽  
...  
Keyword(s):  
Form Factor ◽  
Pulse Width ◽  
Disk Drive ◽  
Drop Test ◽  
Air Bearing ◽  
Shock Pulse ◽  
Small Form ◽  
Air Bearing Slider ◽  
Small Form Factor

Effect of Dimple Offset on the Operational Shock Performance of Small Form Factor Disk Drives

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Puneet Bhargava ◽  
David B. Bogy
Keyword(s):  
Form Factor ◽  
Hard Disk Drives ◽  
Leading Edge ◽  
Disk Drive ◽  
Air Bearing ◽  
Disk Drives ◽  
Small Form ◽  
Small Form Factor ◽  
Bearing Dynamics ◽  
Operational Shock

This paper discusses the effect of varying the suspension load dimple location on the shock robustness of small form factor hard disk drives. We use the CML shock simulator, which simulates the structural as well as the air bearing dynamics of the disk drive simultaneously. The location of the dimple is varied and simulations are run for various load positions on the back of the slider, while adjusting the pitch static attitude (PSA) and the roll static attitude (RSA) of the slider such that the flying attitude of the slider remains the same. We simulate shocks of 0.5 ms pulse width for a commercially available slider and suspension designs for a 1 in. drive. We observe that shock resistance is optimal when the dimple is offset toward the leading edge of the slider. This behavior is explained on the basis of a linearized air bearing model. It is also observed that moving the dimple too much toward the leading edge causes the mechanism of shock failure to change resulting in lower shock tolerances.

Shock Response of a Small Form Factor Hard Disk Drive With Air Bearing Interface Fully Coupled

2007 ◽  
Author(s):  
Jih-Ping Peng ◽  
Yu-Min Lee
Keyword(s):  
Form Factor ◽  
Hard Disk Drive ◽  
Degrees Of Freedom ◽  
Reynolds Equation ◽  
Hard Disk ◽  
Disk Drive ◽  
Air Bearing ◽  
Small Form ◽  
Shock Response ◽  
Small Form Factor

The present paper investigates the shock response of a small form factor hard disk drive (HDD). Both the air bearing and the entire HDD structure are considered in the model. The air bearing is described by the compressible Reynolds equation. The HDD structure is modeled by the finite element method. The Guyan reduction method is used to reduce the number of degrees of freedom to manageable size. CML Dynamic Simulator is used to solve the coupled structure equations and air bearing Reynolds equation.

Design of the rotary VCM actuator for small form factor optical disk drive

2009 ◽  
Vol 16 (1-2) ◽  
pp. 205-212 ◽  
Author(s):  
Myeong-Gyu Song ◽  
Jung-Hyun Woo ◽  
No-Cheol Park ◽  
Jeonghoon Yoo ◽  
Young-Pil Park ◽  
...  
Keyword(s):  
Form Factor ◽  
Disk Drive ◽  
Optical Disk ◽  
Small Form ◽  
Optical Disk Drive ◽  
Small Form Factor

SHOCK RESPONSE OF THE CLAMPED DISK IN SMALL FORM FACTOR HARD DISK DRIVE

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1592-1597 ◽  
Author(s):  
BIN GU ◽  
DONGWEI SHU ◽  
BAOJUN SHI ◽  
GUOXING LU
Keyword(s):  
Finite Element ◽  
Form Factor ◽  
Hard Disk Drive ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drive ◽  
Element Model ◽  
Small Form ◽  
Shock Response ◽  
Small Form Factor

As small form factor (one-inch and smaller) hard disk drives are widely used in portable consumer appliances and gadgets, their mechanical robustness is of greater concern. In the previous work, it is found that when the disk is more tightly clamped, it helps to decrease the shock response of the disk and then avoid the head slap. In this paper, the real boundary condition of the disk for a small form factor hard disk drive from Seagate is investigated numerically. The disk is clamped between the clamp and the hub. The shock response of the disk under a half-sine acceleration pulse is simulated by using the finite element method. In the finite element model, both contact between disk and clamp and contact between disk and hub are considered. According to the simulation results, how to decrease the shock response of the disk is suggested.

MODAL ANALYSIS AND DAMPING MEASUREMENT OF THE HEAD ARM ASSEMBLY OF A SMALL FORM FACTOR HARD DISK DRIVE

2010 ◽  
Vol 24 (01n02) ◽  
pp. 26-33
Author(s):  
B. J. SHI ◽  
B. GU ◽  
D. W. SHU ◽  
T. H. JIN
Keyword(s):  
Form Factor ◽  
Modal Analysis ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drive ◽  
Numerical Results ◽  
Fe Model ◽  
Small Form ◽  
Small Form Factor ◽  
Consumer Devices

As non-traditional applications of hard disk drives (HDDs) emerge, the interest in the effects of shock and vibration on small form factor (SFF) drives has come into currency due to the increasingly hostile environments encountered in the usage of the portable computer as well as the application in consumer devices. In this paper, the dynamic characteristics of an SFF drive were investigated using both experimental and numerical techniques, including modal analysis and damping measurement of the head arm assembly (HAA) of the drive. A finite element (FE) model of the HAA was created to perform numerical analysis. The FE model was verified and modified according to numerical results and experimental results. It is found that numerical results of the HAA in it free state and those in its preloading state coincide well with those of experiments, and/or those by other researchers.

Design of Suspension and Swing Arm for Small Form Factor Optical Disk Drive

2003 ◽  
Author(s):  
No-Cheol Park ◽  
Eo-Jin Hong ◽  
Dong-Wook Kim ◽  
Hyun-Seok Yang ◽  
Young-Pil Park ◽  
...  
Keyword(s):  
Form Factor ◽  
Disk Drive ◽  
Optical Disk ◽  
Small Form ◽  
Optical Disk Drive ◽  
Swing Arm ◽  
Small Form Factor
Sign in / Sign up

Export Citation Format

Share Document