A Comparison of Four Discrete-Time Repetitive Control Algorithms

Kempf, Carl J.; Messner, William C.; Tomizuka, Masayoshi; Horowitz, Roberto

doi:10.23919/acc.1992.4792633

Cited by 124 publications

(86 citation statements)

References 4 publications

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“…The advantages and disadvantages of repetitive control are well summarized in [96] based on four different algorithms to cancel periodic disturbance. A tutorial on iterative learning control and repetitive control is given in [156].…”

Section: ) Focus Servomentioning

confidence: 99%

“…Broadly broken down into feedforward and feedback algorithms, repetitive control algorithms provide compensating signals at harmonics of the spindle rotation frequency to address repeatable runout. Ultimately, the algorithms are examples of the internal model principle [95] because there must be some feedback to adapt the feedforward signal [96], [97]. Algorithms that provide high gain at every harmonic of the rotation frequency up to the Nyquist frequency have largely been replaced by phase-stabilized high-gain resonant filters that address just a few of the disturbances [98].…”

Section: Improving Tracking Performancementioning

confidence: 99%

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Control Methods in Data-Storage Systems

Cherubini

Chung

Messner

et al. 2012

IEEE Trans. Contr. Syst. Technol.

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Abstract-The recording performance of data-storage devices, in which write/read elements move relative to a storage medium to reliably store and retrieve information, depends on the capability of servo mechanisms to provide the necessary positioning accuracy. The desired characteristics of servo mechanisms for datastorage systems include robustness against variations of environmental parameters, high resolution, accuracy, stability, and fast response. This paper presents a comprehensive overview of advanced servo-control methods for data storage. The applications are to well-established recording technologies, including magnetic tape and magnetic disk systems as well as CD/DVD/Blue-Ray optical data-storage systems. Moreover, newer holographic and nearfield optical systems and the emerging probe-storage technology are also addressed. Emphasis is given to the potential exhibited by the technologies considered for achieving ultra-high storage capacity, as required by the exploding demand in data-storage capacity for archival systems and massive multimedia data storage.Index Terms-Control systems, hard-disk drive, holographic data storage, optical-disk drive, scanning-probe data storage, servomechanism, tape drive.

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Section: ) Focus Servomentioning

confidence: 99%

Section: Improving Tracking Performancementioning

confidence: 99%

Control Methods in Data-Storage Systems

Cherubini

Chung

Messner

et al. 2012

IEEE Trans. Contr. Syst. Technol.

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“…The benefit of RC is that it does not require the same initial condition each trial. For more detail on discrete RC see [7], [16], [17].…”

Section: Office Building Temperature Controlmentioning

confidence: 99%

Learning/repetitive control for building systems with nearly periodic disturbances

Vinther

Chandan

Alleyne

2013

2013 European Control Conference (ECC)

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Abstract-In this paper, learning/repetitive control is proposed for improvement of existing feedback control loops for temperature regulation in buildings. A single zone office building is used as an example, with real weather data for Phoenix Arizona and realistic occupancy load schedules. Simulations have shown a decrease in the average set point tracking error of more than 50%, even without additional energy consumption. This can be achieved in situations where the load disturbances have enough repeatability and a repeatable-to-nonrepeatable ratio can be computed to determine if learning should be used and at which frequencies. Furthermore, the increased tightness in reference tracking could be used to lower energy consumption by moving the reference set point closer to the boundaries of the allowable temperature range.

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“…The benefits of adaptive techniques in HDD-servo systems have been already practically investigated in [9], [12], [15], and [16]. For instance, adaptive controllers were used for cancellation of actuator resonances, achieving subsequently the increase of the servo bandwidth [23], [24].…”

Section: Introductionmentioning

confidence: 99%