Search Results - "Wai Ee Wong"

Optimal Narrow-Band Disturbance Filter for PZT-Actuated Head Positioning Control on a Spinstand by Zheng, J., Guo, G., Wang, Y., Wong, W.E.

“…Narrow-band position error at midfrequencies around the open-loop crossover frequency cannot be effectively reduced by using a conventional peak filter,…”
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Automated 2-D Scanning Setup on Spinstand for Evaluation of Ultra-High-Density Recording Data by Teo, Kim Keng, Chan, Kheong Sann, Wong, Wai Ee

“…In this paper, we present an automated technique of extracting the two-dimensional (2-D) readback waveforms from the spinstand for evaluation of the written…”
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Evaluation and Compensation of Quantization Effect on Servo Performance for Hard Disk Drives by Du, Chunling, Guo, Guoxiao, Ee Wong, Wai

“…We investigated the quantization effect on the servo performance of a 1.8-in hard disk drive by changing the bits of the proposed quantizer model. We measured…”
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Nonrepeatable Run-out Rejection Using Online Iterative Control for High-Density Data Storage by Chee Khiang Pang, Wai Ee Wong, Guoxiao Guo, Chen, B.M., Tong Heng Lee

“…The spectra of disturbances and noises affecting precise servo positioning for ultrahigh-density storage in future hard disk drives are time-varying and remain…”
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PC-based position error signal generation and servo system for a spinstand by Wai Ee Wong, Wai Ee Wong, Lu Feng, Lu Feng, Zhimin He, Zhimin He, Jun Liu, Jun Liu, Cheng Mun Kan, Cheng Mun Kan, Guoxiao Guo, Guoxiao Guo

“…We describe a high-performance servo control system for enhancement of spinstand servo performance. This PC-based system uses a multifunction I/O card for…”
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Position error signal detection from the user sector for high position update rate in patterned media recording technology by Wong, Wai Ee, Zhang, Songhua, Chan, Kheong Sann

“…Achievable high recording track density in hard disk drives (HDDs) is often limited by the servo performance and the presence of disturbances and instability…”
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Writing Process Modeling and Identification for Heat-Assisted Magnetic Recording by Ma, Kun, Wong, Wai Ee, Wang, Jianyi, Guo, Guoxiao, Wang, Youyi

“…Written-in signal quality for heat-assisted magnetic recording (HAMR) is dominated by the hot spot thermal profile on the media. The thermal profile is…”
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Effect of Read Head Scaling on Servo and Data Signal Characteristics for Staggered Two-Row-per-Track Bit-Patterned-Media Recording by Zhang, Songhua, Chen, Bingjin, Wong, Wai-Ee, Lin-Yu, Maria, Liu, Zhejie

“…In this paper, we investigate the effect of read head profile on the playback signal from data and servo sector in a staggered bit-patterned-media recording…”
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Timing and Written-In Errors Characterization for Bit Patterned Media by Zhang, Songhua, Cai, Kui, Lin-Yu, Maria, Zhang, Jingliang, Qin, Zhiliang, Teo, Kim Keng, Wong, Wai Ee, Ong, Eng Teo

“…Synchronous writing in BPMR has been recognized as a crucial yet challenging issue. It has been shown that position jitter and switching field distribution can…”
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Experimental study of disk vibration reduction via stacked disks by Du, Chunling, Wong, Wai Ee, Guo, Guoxiao

“…In order to improve the position accuracy of testing and manufacturing equipments such as spin stand and servo track writer with minimal mechanical…”
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HAMR Writing Process Model-Based Compensation of Laser-Induced Transients by Wang, Jianyi, Ma, Kun, Ye, Zhen, Wong, Wai Ee, Guo, Guoxiao, Wang, Youyi

“…An established model is presented, which includes relative slow write head protrusion, fast near-field transducer (NFT) only protrusion, and heat transient…”
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Modelling and compensation for laser induced transients to improve HAMR writing quality by Jianyi Wang, Kun Ma, Zhen Ye, Wai Ee Wong, Guoxiao Guo, Youyi Wang

“…A model including NFT slow and fast protrusions and heat transient in HAMR writing is given. The effects of transients on different types of writing are…”
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Evaluation of Servo Patterns for Perpendicular Recording by Songhua Zhang, Wai Ee Wong

“…Position error signal (PES) plays a crucial role in hard disk drives by providing the position information of the read head to the servo controller. In this…”
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Automated 2D/3D scanning and evaluation of written data on spinstand by Kim Keng Teo, Kheong Sane Chan, Wai Ee Wong

“…In this paper we present an automated technique of extracting the 2D readback waveforms from the spinstand especially for the evaluation of the servo pattern…”
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NRRO Rejection using Online Iterative Control for High Density Data Storage on a PC-Based Spinstand Servo System by Chee Khiang Pang, Wai Ee Wong, Guoxiao Guo, Chen, B.M., Tong Heng Lee

“…In this paper, an OICA (Online Iterative Control Algorithm) by setting measured PES (Position Error Signal) into the servo system to achieve high track…”
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A position encoding and decoding scheme for ultra high density magnetic recording by Wai Ee Wong, Guoxiao Guo, Al Mamum, A., Weichun Ye, Jingliang Zhang

“…With the increasing demands on the storage capacity and access speed of hard disk drives (HDD), data is recorded in ever-narrow tracks that must be followed…”
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Implementation of a servo positioning system on spin stand by Wai Ee Wong, Lu Feng, Guoxiao Guo, Weichun Ye, Al-Mamun, A.

“…To achieve an ultra-high track density in magnetic recording systems, high precision and efficient servomechanism is needed to position the head on the desired…”
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Stretching servo performances on a spin stand by Feng, Lu, Wong, Waiee, Du, Chunling, Duan, Chang, Guo, Guo Xiao, Chong, Tow Chong, Ye, Weichun

“…To support a higher track recording density for future generation magnetic recording systems on a conventional spin stand, good servo controllers and…”
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Implementation of a high performance multirate control system using PC by Jun Liu, Wai Ee Wong, Lu Feng, Guoxiao Guo

“…In this paper, a high performance control system using personal computer (PC) is presented. This system uses a multifunction I/O card for control output and a…”
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