Paper-Conference

Control of Dual-stage HDDs with Enhanced Repetitive Disturbance Rejection
Nowadays, despite the emerging adoption of the solid state drives, hard disk drives (HDDs) are still used extensively as cost-effective …
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An Inverse-Free Disturbance Observer for Adaptive Narrow-Band Disturbance Rejection With Application to Selective Laser Sintering
Selective laser sintering (SLS) is an additive manufactur- ing (AM) process that builds 3-dimensional (3D) parts by scan- ning a laser …
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Multi-band beyond-Nyquist Disturbance Rejection on a Galvanometer Scanner System
In many laser processing applications, galvanometer scanners are integrated to a larger system that creates external disturbances to …
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Disturbance Observer Based Control Design for Wind Turbine Speed Regulation
Disturbance observer based (DOB) control has been implemented in motion control to reject unknown or time-varying disturbances. In this …
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Spectral Distribution and Implications of Feedback Regulation beyond Nyquist Frequency
A fundamental challenge in digital and sampled-data control arises when the continuous-time plant is subject to fast disturbances that …
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Enhanced Wide-Spectrum Vibration Suppression Based on Adaptive Loop Shaping
In linear feedback control, the attenuation of disturbances at the designer-selected frequencies is subjected to the fundamental …
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Extended State Observer with Phase Compensation to Deal with High-frequency Vibrations in Hard Disk Drives
The extended state observer (ESO), as a special case of high-gain observers, can estimate not only the state variables but also unknown …
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Input-to-output Discontinuity and Transient Improvement in Add-on Control Design
Add-on control is commonly used in control systems for disturbance rejection and servo enhancements. Despite the capability of greatly …
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Multirate Forward-model Disturbance Observer for Feedback Regulation beyond Nyquist Frequency
A fundamental challenge in digital and sampleddata control arises when the controlled plant is subjected to fast disturbances with, …
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Interlaced Direct Adaptive Regulation Scheme Applied to a Benchmark Problem
An adaptive regulation scheme using the Internal Model Principle and an IIR Youla-Kucera controller parametrization is proposed for the …
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