Paper-Conference

Selective Model Inversion and Adaptive Disturbance Observer for Rejection of Time-varying Vibrations on an Active Suspension
This paper presents an adaptive control scheme for identifying and rejecting unknown and/or time-varying narrow-band vibrations. We …
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Control Methodologies for Precision Positioning Systems
We have many servo systems that require nano/micro level positioning accuracy. This requirement sets a number of interesting challenges …
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Neural-Network Based Automatic PID Gain Tuning in the Presence of Time-Varying Disturbances in Hard Disk Drives
In hard disk drive (HDD) systems, disturbances commonly contain different frequency components that are time-varying in nature. …
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Add-on Loop Shaping via Youla Parameterization for Precision Motion Control
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Inverse-Based Local Loop Shaping and IIR-filter Design For Precision Motion Control
In motion-control problems such as vibration rejection, periodical reference tracking, and harmonic disturbance cancellation, the …
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A Convex Optimization Approach for Solving the Robust Strictly Positive Real (SPR) Problem
In system identification and adaptive control, the problem of designing strictly positive real (SPR) transfer functions in the presence …
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Decoupled Disturbance Observers for Dual-Input-Single-Output Systems With Application to Vibration Rejection in Dual-Stage Hard Disk Drives
The disturbance observer (DOB) has been one effective robust control approach for servo enhancement in single-input-single-output …
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An Enhanced Repetitive Control Algorithm using the Structure of Disturbance Observer
In repetitive control, the enhanced servo performance at multiple repetitive frequencies is usually followed by undesired error …
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Reduced-complexity Adaptive Youla Parameterization for Broadband-Vibration Rejection in Dual-stage Hard Disk Drives
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Spiral Servo Writing in Hard Disk Drives Using Iterative Learning Based Tracking Control
The servo control in a hard disk drive (HDD) system relies heavily on the position information obtained from the servo sectors. As the …
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