Results 11 to 20 of about 99,857 (266)

Frequency Adaptive Control Technique for Periodic Runout and Wobble Cancellation in Optical Disk Drives [PDF]

Journal of Systemics, Cybernetics and Informatics, 2006
Periodic disturbance occurs in various applications on the control of the rotational mechanical systems. For optical disk drives, the spirally shaped tracks are usually not perfectly circular and the assembly of the disk and spindle motor is unavoidably ...
Yee-Pien Yang, Jieng-Jang Liu
doaj  

Track following control using nonlinear model predictive control in hard disk drives [PDF]

2013 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2013
In this paper, a Nonlinear Model Predictive Control (NMPC) is proposed to control a single stage Voice-Coil- Motor (VCM) of a Hard-Disk-Drive (HDD). Due to its fast settling time and its robustness, this controller is suggested to be applied for the first time to control a R/W head of an HDD. To highlight the good performance and characteristics of the
Taktak-Meziou, Manel, Chemori, Ahmed, Ghommam, Jawhar, Derbel, Nabil   +3 more
openaire   +2 more sources

Feedforward control with sampled-data polynomial based on triangle hold for track seek of hard disk drive

Journal of Advanced Mechanical Design, Systems, and Manufacturing
This research proposes feedforward control techniques aimed at reducing the seek time in hard disk drives (HDDs). These techniques utilize a sampled-data polynomial approach based on a triangular approximation first-order hold (triangle hold) with a non ...
Kazuho IGARASHI, Ryo IGARASHI, Takenori ATSUMI, Shigeyuki NAKADAI   +3 more
doaj   +1 more source

Effects of Nitride on the Tribological Properties of the Low Carbon Alloy Steel

Advances in Materials Science and Engineering, 2013
The technology of composite heat treatment is used popularly for low friction and wear resistance of drive elements. A large number of papers about the heat treatment technology had been proposed.
Yuh-Ping Chang, Jin-Chi Wang, Jeng-Haur Horng, Li-Ming Chu, Yih-Chyun Hwang   +4 more
doaj   +1 more source

Simulations of Accretion Powered Supernovae in the Progenitors of Gamma Ray Bursts [PDF]

, 2012
Observational evidence suggests a link between long duration gamma ray bursts (LGRBs) and Type Ic supernovae. Here, we propose a potential mechanism for Type Ic supernovae in LGRB progenitors powered solely by accretion energy.
Arnett, Balbus, Beloborodov, Beloborodov, Binney, Bisnovatyi-Kogan, Bisnovatyi-Kogan, Bloom, Burrows, Calder, Chen, Chieffi, Chornock, Christodoulou, Christopher C. Lindner, Cobb, Dessart, Di Matteo, Fryer, Fryxell, Fujimoto, Galama, Garnavich, Hamuy, Heger, Hjorth, Igumenshchev, Igumenshchev, Igumenshchev, Joggerst, Kasen, Kawabata, Khokhlov, Kohri, Kuhfuß, Landau, Lazzati, Lazzati, Lee, Limongi, Lindner, López-Cámara, López-Cámara, MacFadyen, MacFadyen, Malesani, Marek, Matheson, Mazzali, Mazzali, McKinney, Mezzacappa, Milosavljević, Miloš Milosavljević, Mirabal, Modjaz, Morsony, Morsony, Murphy, Murphy, Nagakura, Nagakura, Nagataki, Nordhaus, Nousek, O'Brien, O'Connor, Paczyński, Pawan Kumar, Perna, Podsiadlowski, Popham, Pruet, Pruet, Raskin, Reichart, Rongfeng Shen, Seitenzahl, Sekiguchi, Shakura, Soderberg, Stanek, Surman, Thompson, Thompson, Timmes, Wheeler, Woosley, Young, Zhang, Zimmerman   +90 more
core   +2 more sources

Silicon micromachined electromagnetic microactuators for rigid disk drives [PDF]

, 1995
It is projected that by the year 2001, the disk drive industry will be shipping products with track density on the order of 25,000 tracks-per-inch, which would require a servo bandwidth of at least 3 kHz.
Desai, Amish, Miller, Raanan, Miu, Denny K., Tai, Yu-Chong, Tang, Weilong, Temesvary, Viktoria   +5 more
core  

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

Advanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente, J. Nunes‐Pereira, A. P. Silva, P. N. B. Reis   +3 more
wiley   +1 more source

Enhancing Log-Likelihood Ratios with Mutual Information on Three-Reader One-Track Detection in Staggered BPMR Systems

Applied Sciences
Because so much information is currently being shared online, there has been a sharp rise in the need for data storage devices over the past ten years. The main storage option is the hard disk drive (HDD), which is less expensive than some other types of
Natthakan Rueangnetr, Santi Koonkarnkhai, Piya Kovintavewat, Simon John Greaves, Chanon Warisarn   +4 more
doaj   +1 more source

Mechanical sequencer [PDF]

, 1977
A mechanical sequencer having a rotatable drive shaft is described. The drive shaft has a spline formed thereon. A freely rotatable shaft contains a plurality of rollers positioned thereon, the axis of the freely rotatable shaft having an axis parallel ...
Appleberry, W. T.
core   +1 more source

3D‐Printed Giant Magnetoresistive (GMR) Sensors Based on Self Compliant Springs

Advanced Engineering Materials, EarlyView.
This work explores 3D‐printed GMR sensors utilizing self‐compliant spring structures and conductive PLA composites. By optimizing arm width, we achieved high piezoresistive (0.34%/mm) and magnetoresistive (0.77%/mT) sensitivities. Demonstrated through Bluetooth‐integrated pressure and magnetic position sensing, these full printed low‐cost, customizable
Josu Fernández Maestu, Nelson Pereira, Javier Vicente, Carmen Rial Tubio, Senentxu Lanceros‐Méndez   +4 more
wiley   +1 more source