Journal ArticleDOI
Digital control of repetitive errors in disk drive systems
Kok Kia Chew,Masayoshi Tomizuka +1 more
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A modified prototype repetitive controller is applied as a plug-in module to a Winchester disk drive with a preexisting analog feedback controller to demonstrate its efficacy in the reduction of this periodic component.Abstract:
Tracking errors in disk drive systems have a significant repetitive component that is not explicitly taken into account in conventional servo controllers. A modified prototype repetitive controller is applied as a plug-in module to a Winchester disk drive with a preexisting analog feedback controller to demonstrate its efficacy in the reduction of this periodic component. A review of the Winchester disk drive system is included. >read more
Citations
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Robust control design with MATLAB
TL;DR: Robust Control Design with MATLAB is for graduate students and practising engineers who want to learn how to deal with robust control design problems without spending a lot of time in researching complex theoretical developments.
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Invited review article: high-speed flexure-guided nanopositioning: mechanical design and control issues.
TL;DR: This paper surveys key advances in mechanical design and control of dynamic effects and nonlinearities, in the context of high-speed nanopositioning, as well as future challenges and research topics.
Journal ArticleDOI
Brief Repetitive control for systems with uncertain period-time
TL;DR: A robust repetitive controller structure is proposed that uses multiple memory-loops in a certain feedback configuration, such that small changes in period-time do not diminish the disturbance rejection properties.
Journal ArticleDOI
Harmonic generation in adaptive feedforward cancellation schemes
TL;DR: It is shown that an algorithm designed to reject a certain number of frequency components may in fact be capable of reducing higher-order harmonics as well and this effect originates in the time-variation of the adaptive parameters.
Journal ArticleDOI
High-performance programmable AC power source with low harmonic distortion using DSP-based repetitive control technique
TL;DR: In this article, a two-layer controller consisting of a tracking controller and a repetitive controller is proposed to improve both the transient and steady-state responses of a closed-loop regulated pulsewidth-modulated (PWM) inverter for high-quality sinusoidal AC voltage regulation.
References
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Feedback Systems: Input-output Properties
TL;DR: In this paper, the Bellman-Gronwall Lemma has been applied to the small gain theorem in the context of linear systems and convolutional neural networks, and it has been shown that it can be applied to linear systems.
Journal ArticleDOI
Zero Phase Error Tracking Algorithm for Digital Control
TL;DR: In this article, a digital feed-forward control algorithm for tracking desired time varying signals is presented, which is particularly suited to the general motion control problems including robotic arms and positioning tables.
Journal ArticleDOI
Repetitive control system: a new type servo system for periodic exogenous signals
TL;DR: In this article, a control scheme called repetitive control is proposed, in which the controlled variables follow periodic reference commands, and a high-accuracy asymptotic tracking property is achieved by implementing a model that generates the periodic signals of period L into the closed-loop system.
Journal ArticleDOI
The internal model principle for linear multivariable regulators
Bruce A. Francis,W. M. Wonham +1 more
TL;DR: In this paper, structural stability of linear multivariable regulators is defined and necessary and sufficient structural criteria are obtained for linear multi-variable regulators which retain loop stability and output regulation in the presence of small perturbations, of specified types, in system parameters.
Journal ArticleDOI
High Accuracy Control of a Proton Synchrotron Magnet Power Supply
TL;DR: In this article, a linear feedback control is applied in high accuracy tracking of a periodic reference input by locating the imaginary poles of the controller's transfer function to suit the period of the input.