scholarly journals An Analysis of Damping Coefficients for Capillary Type Orifices on a Curved Stabilizer used in a High Speed Rotating Flexible Optical Disk System

2011 ◽  
Vol 7 (1) ◽  
pp. 25-30
Author(s):  
Ki-Wook Song ◽  
Yoon-Chul Rhim
Keyword(s):  
High Speed ◽  
Optical Disk ◽  
Disk System ◽  
Damping Coefficients ◽  
Capillary Type

scholarly journals Achievement Method of High-Speed Response of Error Prediction Tracking Control for Optical Disk System

2007 ◽  
Vol 127 (9) ◽  
pp. 942-949 ◽  
Author(s):  
Toru Hayano ◽  
Isao Shibutani ◽  
Kiyoshi Ohishi ◽  
Toshimasa Miyazaki ◽  
Daiichi Koide ◽  
...  
Keyword(s):  
Tracking Control ◽  
High Speed ◽  
Optical Disk ◽  
Error Prediction ◽  
Disk System ◽  
Speed Response

High-speed recording technologies for a magneto-optical disk system

1991 ◽  
Author(s):  
Hirofumi Sukeda ◽  
Hiroyuki Tsuchinaga ◽  
Satoshi Tanaka ◽  
Toshio Niihara ◽  
Shigeru Nakamura ◽  
...  
Keyword(s):  
High Speed ◽  
Optical Disk ◽  
Disk System

A High-Speed, Large-Capacity, Jukebox "Optical Disk System"

Computer ◽  
1985 ◽  
Vol 18 (7) ◽  
pp. 36-45 ◽  
Author(s):  
Ammon ◽  
Calabria ◽  
Thomas
Keyword(s):  
High Speed ◽  
Optical Disk ◽  
Disk System ◽  
Large Capacity

Fine perfect tracking control with ZPLPF for high speed optical disk system

2009 ◽  
Author(s):  
Toshimasa Miyazaki ◽  
Kiyoshi Ohishi ◽  
Yasuharu Yoshida ◽  
Yoshiya Kamigaki ◽  
Daiichi Koide ◽  
...  
Keyword(s):  
Tracking Control ◽  
High Speed ◽  
Optical Disk ◽  
Disk System

Achievement method of high-speed response of error prediction tracking control for optical disk system

2010 ◽  
Vol 170 (4) ◽  
pp. 51-59
Author(s):  
Toru Hayano ◽  
Isao Shibutani ◽  
Kiyoshi Ohishi ◽  
Toshimasa Miyazaki ◽  
Daiichi Koide ◽  
...  
Keyword(s):  
Tracking Control ◽  
High Speed ◽  
Optical Disk ◽  
Error Prediction ◽  
Disk System ◽  
Speed Response

Ball bearing turbocharger vibration management: application on high speed balancer

2020 ◽  
Vol 21 (6) ◽  
pp. 619
Author(s):  
Kostandin Gjika ◽  
Antoine Costeux ◽  
Gerry LaRue ◽  
John Wilson
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Ball Bearing ◽  
Squeeze Film ◽  
Design And Technology ◽  
Squeeze Film Damper ◽  
Damping Coefficients ◽  
Bearing Loads ◽  
Stiffness And Damping

Today's modern internal combustion engines are increasingly focused on downsizing, high fuel efficiency and low emissions, which requires appropriate design and technology of turbocharger bearing systems. Automotive turbochargers operate faster and with strong engine excitation; vibration management is becoming a challenge and manufacturers are increasingly focusing on the design of low vibration and high-performance balancing technology. This paper discusses the synchronous vibration management of the ball bearing cartridge turbocharger on high-speed balancer and it is a continuation of papers [1–3]. In a first step, the synchronous rotordynamics behavior is identified. A prediction code is developed to calculate the static and dynamic performance of “ball bearing cartridge-squeeze film damper”. The dynamic behavior of balls is modeled by a spring with stiffness calculated from Tedric Harris formulas and the damping is considered null. The squeeze film damper model is derived from the Osborne Reynolds equation for incompressible and synchronous fluid loading; the stiffness and damping coefficients are calculated assuming that the bearing is infinitely short, and the oil film pressure is modeled as a cavitated π film model. The stiffness and damping coefficients are integrated on a rotordynamics code and the bearing loads are calculated by converging with the bearing eccentricity ratio. In a second step, a finite element structural dynamics model is built for the system “turbocharger housing-high speed balancer fixture” and validated by experimental frequency response functions. In the last step, the rotating dynamic bearing loads on the squeeze film damper are coupled with transfer functions and the vibration on the housings is predicted. The vibration response under single and multi-plane unbalances correlates very well with test data from turbocharger unbalance masters. The prediction model allows a thorough understanding of ball bearing turbocharger vibration on a high speed balancer, thus optimizing the dynamic behavior of the “turbocharger-high speed balancer” structural system for better rotordynamics performance identification and selection of the appropriate balancing process at the development stage of the turbocharger.

Control System for Suppressing Tracking Error Offset and Multiharmonic Disturbance in High-Speed Optical Disk Systems

2012 ◽  
Vol 132 (3) ◽  
pp. 347-356 ◽  
Author(s):  
Yuta Nabata ◽  
Tatsuya Nakazaki ◽  
Tokoku Ogata ◽  
Kiyoshi Ohishi ◽  
Toshimasa Miyazaki ◽  
...  
Keyword(s):  
Control System ◽  
High Speed ◽  
Tracking Error ◽  
Optical Disk

High Speed Flexible Optical Disk with Cylindrically Concaved Stabilizer

2007 ◽  
Vol 46 (6B) ◽  
pp. 3750-3754 ◽  
Author(s):  
Yasutomo Aman ◽  
Nobuaki Onagi ◽  
Shozo Murata ◽  
Yasunori Sugimoto ◽  
Daiichi Koide ◽  
...  
Keyword(s):  
High Speed ◽  
Optical Disk
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