Design of ramp profile to improve the unloading performance in small form factor HDD

Yonghyun Lee, No Cheol Park, Kyoung Su Park, Hyunseok Yang, Young Pil Park, Ki Hoon Kim, Seokhwan Kim, Yong Eun Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Load/unload(L/UL) mechanism has been widely used in small form factor hard disk drive(SFF HDD) because it has many advantages necessary for portability. The ramp profile is one of the most dominant parameters which affect L/UL performance. In this paper, we focus on the design procedure of optimal ramp profile to improve the unloading performance. Firstly, the effects of the vertical unloading velocity are investigated by experiment. Secondly, designable ramp slopes are gained from the governing equations for the suspension and the slider. Finally, optimal ramp profile is designed and made through the ramp slopes, height and length. Therefore, this paper analyzes the dynamic characteristics for various unloading velocities, establishes the thesis for the optimal ramp profile design and verifies the unloading performance of the designed ramp profile with the experiment.

Original languageEnglish
Title of host publication15th International Congress on Sound and Vibration 2008, ICSV 2008
Pages2509-2516
Number of pages8
Publication statusPublished - 2008 Dec 1
Event15th International Congress on Sound and Vibration 2008, ICSV 2008 - Daejeon, Korea, Republic of
Duration: 2008 Jul 62008 Jul 10

Publication series

Name15th International Congress on Sound and Vibration 2008, ICSV 2008
Volume3

Other

Other15th International Congress on Sound and Vibration 2008, ICSV 2008
CountryKorea, Republic of
CityDaejeon
Period08/7/608/7/10

Fingerprint

unloading
ramps
form factors
profiles
slopes
theses
chutes
dynamic characteristics

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Lee, Y., Park, N. C., Park, K. S., Yang, H., Park, Y. P., Kim, K. H., ... Lee, Y. E. (2008). Design of ramp profile to improve the unloading performance in small form factor HDD. In 15th International Congress on Sound and Vibration 2008, ICSV 2008 (pp. 2509-2516). (15th International Congress on Sound and Vibration 2008, ICSV 2008; Vol. 3).
Lee, Yonghyun ; Park, No Cheol ; Park, Kyoung Su ; Yang, Hyunseok ; Park, Young Pil ; Kim, Ki Hoon ; Kim, Seokhwan ; Lee, Yong Eun. / Design of ramp profile to improve the unloading performance in small form factor HDD. 15th International Congress on Sound and Vibration 2008, ICSV 2008. 2008. pp. 2509-2516 (15th International Congress on Sound and Vibration 2008, ICSV 2008).
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abstract = "Load/unload(L/UL) mechanism has been widely used in small form factor hard disk drive(SFF HDD) because it has many advantages necessary for portability. The ramp profile is one of the most dominant parameters which affect L/UL performance. In this paper, we focus on the design procedure of optimal ramp profile to improve the unloading performance. Firstly, the effects of the vertical unloading velocity are investigated by experiment. Secondly, designable ramp slopes are gained from the governing equations for the suspension and the slider. Finally, optimal ramp profile is designed and made through the ramp slopes, height and length. Therefore, this paper analyzes the dynamic characteristics for various unloading velocities, establishes the thesis for the optimal ramp profile design and verifies the unloading performance of the designed ramp profile with the experiment.",
author = "Yonghyun Lee and Park, {No Cheol} and Park, {Kyoung Su} and Hyunseok Yang and Park, {Young Pil} and Kim, {Ki Hoon} and Seokhwan Kim and Lee, {Yong Eun}",
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Lee, Y, Park, NC, Park, KS, Yang, H, Park, YP, Kim, KH, Kim, S & Lee, YE 2008, Design of ramp profile to improve the unloading performance in small form factor HDD. in 15th International Congress on Sound and Vibration 2008, ICSV 2008. 15th International Congress on Sound and Vibration 2008, ICSV 2008, vol. 3, pp. 2509-2516, 15th International Congress on Sound and Vibration 2008, ICSV 2008, Daejeon, Korea, Republic of, 08/7/6.

Design of ramp profile to improve the unloading performance in small form factor HDD. / Lee, Yonghyun; Park, No Cheol; Park, Kyoung Su; Yang, Hyunseok; Park, Young Pil; Kim, Ki Hoon; Kim, Seokhwan; Lee, Yong Eun.

15th International Congress on Sound and Vibration 2008, ICSV 2008. 2008. p. 2509-2516 (15th International Congress on Sound and Vibration 2008, ICSV 2008; Vol. 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Load/unload(L/UL) mechanism has been widely used in small form factor hard disk drive(SFF HDD) because it has many advantages necessary for portability. The ramp profile is one of the most dominant parameters which affect L/UL performance. In this paper, we focus on the design procedure of optimal ramp profile to improve the unloading performance. Firstly, the effects of the vertical unloading velocity are investigated by experiment. Secondly, designable ramp slopes are gained from the governing equations for the suspension and the slider. Finally, optimal ramp profile is designed and made through the ramp slopes, height and length. Therefore, this paper analyzes the dynamic characteristics for various unloading velocities, establishes the thesis for the optimal ramp profile design and verifies the unloading performance of the designed ramp profile with the experiment.

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Lee Y, Park NC, Park KS, Yang H, Park YP, Kim KH et al. Design of ramp profile to improve the unloading performance in small form factor HDD. In 15th International Congress on Sound and Vibration 2008, ICSV 2008. 2008. p. 2509-2516. (15th International Congress on Sound and Vibration 2008, ICSV 2008).