All issues
Predecessor
21.8
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
Article type: Cover
Pages Cover1-
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (14K) -
Article type: Index
Pages Toc1-
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (28K) -
Koji Saito, Naoki Honda, Goro Obinata, Kazuhiro OuchiArticle type: Article
Pages 1-6
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA piggyback actuator system is a reading candidate for a 1 [micrometer] track pitch magnetic head servo system. Such critical servo system which require severe constraints on the dynamic response will demand a theory for system design, integrating structure design with controller design. However, Integrated design is a well developed method to maintain it. It is not easy to solve the optimization problem of it. Recently. We proposed a new parameterization for the problem that was realized as descriptor system. The proposed parameterization reduces linear parameters of mechanical system into a static controller. Then, A designer is able to evaluate how each parameter of structure contributes to the system performance while optimizing it. The simultaneous optimization of mechanical and control parameters results in the usual problem with a generalized plant and two controllers. In this paper, We discussed how to apply the integrated design method to a piggyback actuator system.View full abstractDownload PDF (609K) -
Yasuo OHTSUBO, Kazushi TANIMOTOArticle type: Article
Pages 7-12
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecent technologies concerned with magnetic head sliders, which are the most important mechanical element of hard disk drives, are described. Flying head sliders have been developed to realize fly height equalization in the range from inner to outer disk diameter through new air bearing designs. Contact recording heads have been studied by using silicon micro beam heads to evaluate head vibration under sliding and wear characteristics. The wear rate of SiO_2 film was less than that of pure silicon.View full abstractDownload PDF (578K) -
M. Yanagisawa, A. Sato, K. AjikiArticle type: Article
Pages 13-18
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSContact recording systems have been studied for future magnetic recording disks with a high recording density. Tribological key technologies for ultra-low spacing and high wear performance are required for the contact systems. In this study, design concepts for contact systems will be discussed from a viewpoint of low spacing and wear behaviors. As a result, a minimum spacing of 3 nm and a high wear performance were obtained for optimal design of contact systems, i. e. pad design and lubricant material, and so on.View full abstractDownload PDF (792K) -
Tadao UCHIKAWA, Kenji TAGAMI, Naoyuki TANABE, Masashi KUBOTAArticle type: Article
Pages 19-24
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have developed an optical video disk recorder using a φ 120mm phase-change disk. We have attained 4.1GB storage data capacity on one side disk, and 27.3Mbps video net bit rate. Bit length of 0.32μm, land-groove recording (0.6μm track width), and (1,7) RLL code and PRML have been adopted, therefore 3.3Gbit/inch^2 of the recording density has been achieved. In such high density and high bit rate recorder, low vibration performance of the spindlemotor is requisite. Then we have analized vibration mode on the disk-machine, and improved the vibration characteristics. Then high quality optical video disk recorder has been attained.View full abstractDownload PDF (976K) -
Hitoshi Yanagisawa, Tadahiro Sakai, Takuji SekiguchiArticle type: Article
Pages 25-31
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSAny slight deviation of the VTR head on the track becomes a serious problem when narrower tracks are used to improve the surface and volume recording densities of VTR tape. Therefore it is indispensable to improve the linearity of recording tracks and the precision of playback tracking. In this study, a pilot signal is recorded on the tape at the initial recording time for use as a reference to find the scanning position of the head, and the positions of the recording/playback heads with actuators are controlled so as to align the head scanning trace with the standerized track pattern.View full abstractDownload PDF (895K) -
Article type: Appendix
Pages App1-
Published: February 07, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (73K)
- |<
- <
- 1
- >
- >|