Paper-Conference

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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A Structure for All Stabilizing Controllers and Its Applications to Narrow-Band Disturbance Rejection in Hard Disk Drives
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An Indirect Adaptive Approach to Reject Multiple Narrow-Band Disturbances in Hard Disk Drives
This paper presents an indirect adaptive control scheme that rejects unknown multiple narrow-band disturbances in hard disk drive …
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Unknown Multiple Narrow-band Disturbance Rejection in Hard Disk Drives--an Adaptive Notch Filter and Perfect Disturbance Observer Approach
In this paper, an adaptive control scheme is developed to reject unknown multiple narrow-band disturbances in a hard disk drive. An …
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Optimal Plant Shaping for High Bandwidth Disturbance Rejection in Discrete Disturbance Observers
The Q-filter cut-off frequency in a Disturbance Observer (DOB) is restricted by the model mismatch between the plant and its nominal …
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