Loop Shaping

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 …
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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, …
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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 …
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Pseudo Youla-Kucera Parameterization with Control of the Waterbed Effect for Local Loop Shaping
New Repetitive Control with Improved Steady-State Performance and Accelerated Transient
In repetitive control (RC), the enhanced servo performance at the fundamental frequency and its higher order harmonics is usually …
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Methods for Closed-loop Compensation of Ultra-high Frequency Disturbances in Hard Disk Drives and Hard Disk Drives Utilizing Same
The importance of safe and flexible disturbance rejection at high frequencies has been ever increasing in modem control systems. For …
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Methods for Closed-loop Compensation of Ultra-high Frequency Disturbances in Hard Disk Drives and Hard Disk Drives Utilizing Same
Optimal Decoupled Disturbance Observers 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 …
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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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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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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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