Article-Journal

Rejecting Fast Narrow-Band Disturbances With Slow Sensor Feedback for Quality Beam Steering in Selective Laser Sintering
A fundamental problem arises in feedback control when the system is subject to fast disturbances but can only get slowly updated sensor …
PDF Cite DOI
Adaptive Loop Shaping for Wideband Disturbances Attenuation in Precision Information Storage Systems
Modern hard disk drive (HDD) systems are subjected to various external disturbances. One particular category, defined as wide-band …
PDF Cite DOI
Disturbance Observer Based Pitch Control of Wind Turbines for Enhanced Speed Regulation
Time-varying unknown wind disturbances influence significantly the dynamics of wind turbines. In this research, we formulate a …
PDF Cite DOI
A Robust Optimal Design for Strictly Positive Realness in Recursive Parameter Adaptation
This paper provides an optimization-based approach to assure the strict positive real (SPR) condition in a set of recursive parameter …
PDF Cite DOI
A Tutorial on Loop-shaping Control Methodologies for Precision Positioning Systems
Many servo systems require micro/nano level positioning accuracy. This requirement sets a number of challenges from the viewpoint of …
PDF Cite DOI
Multirate Forward-model Disturbance Observer for Feedback Regulation beyond Nyquist Frequency
A fundamental challenge in digital control arises when the controlled plant is subjected to a fast disturbance dynamics but is only …
PDF Cite DOI
Discrete-time Reduced-Complexity Youla Parameterization for Dual-input Single-output Systems
A controller design is presented for directly shaping the sensitivity function in the feedback control of dual-input single-output …
PDF Cite DOI
Modified Direct Adaptive Regulation Scheme Applied to a Benchmark Problem
A direct adaptive regulation scheme using an adaptive FIR Youla–Kučera Filter has been proposed for solving the EJC Benchmark on …
PDF Cite DOI
Overview and New Results in Disturbance Observer based Adaptive Vibration Rejection with Application to Advanced Manufacturing
Vibrations with unknown and/or time-varying frequencies significantly affect the achievable performance of control systems, …
PDF Cite DOI
Pseudo Youla-Kucera Parameterization with Control of the Waterbed Effect for Local Loop Shaping
This paper discusses a discrete-time loop shaping algorithm for servo enhancement at multiple wide frequency bands. Such design …
PDF Cite DOI
Pseudo Youla-Kucera Parameterization with Control of the Waterbed Effect for Local Loop Shaping