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2015 | OriginalPaper | Buchkapitel

Automatic Verification of Stability and Safety for Delay Differential Equations

verfasst von : Liang Zou, Martin Fränzle, Naijun Zhan, Peter Nazier Mosaad

Erschienen in: Computer Aided Verification

Verlag: Springer International Publishing

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Abstract

Delay differential equations (DDEs) arise naturally as models of, e.g., networked control systems, where the communication delay in the feedback loop cannot always be ignored. Such delays can prompt oscillations and may cause deterioration of control performance, invalidating both stability and safety properties. Nevertheless, state-exploratory automatic verification methods have until now concentrated on ordinary differential equations (and their piecewise extensions to hybrid state) only, failing to address the effects of delays on system dynamics. We overcome this problem by iterating bounded degree interval-based Taylor overapproximations of the time-wise segments of the solution to a DDE, thereby identifying and automatically analyzing the operator that yields the parameters of the Taylor overapproximation for the next temporal segment from the current one. By using constraint solving for analyzing the properties of this operator, we obtain a procedure able to provide stability and safety certificates for a simple class of DDEs.

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Fußnoten
1
The prototype implementation of the verification tool as well as the examples are available for download from https://​github.​com/​liangdzou/​isat-dde.
 
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Metadaten
Titel
Automatic Verification of Stability and Safety for Delay Differential Equations
verfasst von
Liang Zou
Martin Fränzle
Naijun Zhan
Peter Nazier Mosaad
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-21668-3_20