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Improved computation of dwell time using the real Jordan form

Improved computation of dwell time using the real Jordan form
Improved computation of dwell time using the real Jordan form

This paper addresses stability guarantees for a switching system. For this work, a switching system consists of a collection of subsystems with known LTI models and a switching signal that determines which subsystem model governs the system's dynamics at any given time. The switching signal may be the result of an operator's choice or a reaction to external events. Previous work has shown that the switching system will be stable if the switching signal is piecewise constant and dwells on each chosen value for some minimum period of time. Morse and Geromel have proposed methods for estimating an upper bound on the minimum dwell time from the realizations of the LTI subsystems. In recent work, the authors introduced a method that utilizes the real Jordan form. In this paper, the real Jordan form approach is optimized to achieve the accuracy of Geromel's algorithm at a significantly lower computation cost. Numerical simulation of a switched system derived from an adaptive H∞ vibration attenuation controller illustrates the accuracy and computational efficiency of the proposed algorithm.

4281-4286
Institute of Electrical and Electronics Engineers Inc.
O'Brien, Richard T.
25ee17bb-4e0c-488a-83ac-a67870fc6441
Turner, Matthew C.
6befa01e-0045-4806-9c91-a107c53acba0
O'Brien, Richard T.
25ee17bb-4e0c-488a-83ac-a67870fc6441
Turner, Matthew C.
6befa01e-0045-4806-9c91-a107c53acba0

O'Brien, Richard T. and Turner, Matthew C. (2016) Improved computation of dwell time using the real Jordan form. In 2016 American Control Conference, ACC 2016. vol. 2016-July, Institute of Electrical and Electronics Engineers Inc. pp. 4281-4286 . (doi:10.1109/ACC.2016.7525595).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper addresses stability guarantees for a switching system. For this work, a switching system consists of a collection of subsystems with known LTI models and a switching signal that determines which subsystem model governs the system's dynamics at any given time. The switching signal may be the result of an operator's choice or a reaction to external events. Previous work has shown that the switching system will be stable if the switching signal is piecewise constant and dwells on each chosen value for some minimum period of time. Morse and Geromel have proposed methods for estimating an upper bound on the minimum dwell time from the realizations of the LTI subsystems. In recent work, the authors introduced a method that utilizes the real Jordan form. In this paper, the real Jordan form approach is optimized to achieve the accuracy of Geromel's algorithm at a significantly lower computation cost. Numerical simulation of a switched system derived from an adaptive H∞ vibration attenuation controller illustrates the accuracy and computational efficiency of the proposed algorithm.

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More information

Published date: 28 July 2016
Venue - Dates: 2016 American Control Conference, ACC 2016, United States, 2016-07-05 - 2016-07-07

Identifiers

Local EPrints ID: 439218
URI: http://eprints.soton.ac.uk/id/eprint/439218
PURE UUID: 536959bc-16f9-48b1-873b-6e4a71912875

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Date deposited: 07 Apr 2020 16:30
Last modified: 07 Apr 2020 16:30

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Contributors

Author: Richard T. O'Brien
Author: Matthew C. Turner

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