This paper develops an optimal frequency-weighted strategy to design anytime controllers that can react to changing computational resources. The selection of the weighting function is driven by the expectation of the situations that would require anytime operation. For example, if the anytime operation is due to occasional and isolated missed deadlines, then the weighting on high frequencies should be larger than that for low frequencies. Low frequency components will have a smaller change over one sample time, so failing to update these components for one sample period will have less effect than with the high frequency components. Additional considerations explored in this paper are stability analyses, architectural issues, and transient management. Two examples are included that demonstrate the methodology.
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August 2015
Research-Article
Frequency-Weighted Variable-Length Controllers Using Anytime Control Strategies
Bonnie H. Ferri,
Bonnie H. Ferri
School of Electrical and Computer Engineering,
e-mail: bonnie.ferri@ece.gatech.edu
Georgia Tech
,Atlanta, GA 30332-0250
e-mail: bonnie.ferri@ece.gatech.edu
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Gundula B. Runge
Gundula B. Runge
School of Mechanical Engineering,
e-mail: runge@match.uni-hannover.de
Georgia Tech
,Atlanta, GA 30332-0405
e-mail: runge@match.uni-hannover.de
Search for other works by this author on:
Bonnie H. Ferri
School of Electrical and Computer Engineering,
e-mail: bonnie.ferri@ece.gatech.edu
Georgia Tech
,Atlanta, GA 30332-0250
e-mail: bonnie.ferri@ece.gatech.edu
Aldo A. Ferri
Gundula B. Runge
School of Mechanical Engineering,
e-mail: runge@match.uni-hannover.de
Georgia Tech
,Atlanta, GA 30332-0405
e-mail: runge@match.uni-hannover.de
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received April 27, 2013; final manuscript received February 9, 2015; published online April 6, 2015. Assoc. Editor: YangQuan Chen.
J. Dyn. Sys., Meas., Control. Aug 2015, 137(8): 081001 (10 pages)
Published Online: August 1, 2015
Article history
Received:
April 27, 2013
Revision Received:
February 9, 2015
Online:
April 6, 2015
Citation
Ferri, B. H., Ferri, A. A., and Runge, G. B. (August 1, 2015). "Frequency-Weighted Variable-Length Controllers Using Anytime Control Strategies." ASME. J. Dyn. Sys., Meas., Control. August 2015; 137(8): 081001. https://doi.org/10.1115/1.4029797
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