Abstract
We present the first review of methods to overapproximate the set of reachable states of linear time-invariant systems subject to uncertain initial states and input signals for short time horizons. These methods are fundamental to state-of-the-art reachability algorithms for long time horizons, which proceed in two steps: First they use such a method to discretize the system for a short time horizon, and then they efficiently obtain a solution of the new discrete system for the long time horizon. Traditionally, both qualitative and quantitative comparison between different reachability algorithms has only considered the combination of both steps. In this paper we study the first step in isolation. We perform a variety of numerical experiments for six fundamental discretization methods from the literature. As we show, these methods have different trade-offs regarding accuracy and computational cost and, depending on the characteristics of the system, some methods may be preferred over others. We also discuss preprocessing steps to improve the results and efficient implementation strategies.
Original language | English |
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Title of host publication | Integrated Formal Methods - 17th International Conference, IFM 2022, Proceedings |
Editors | Maurice H. ter Beek, Rosemary Monahan |
Number of pages | 19 |
Publisher | Springer |
Publication date | 2022 |
Pages | 149-167 |
ISBN (Print) | 978-3-031-07726-5 |
ISBN (Electronic) | 03029743 |
DOIs | |
Publication status | Published - 2022 |
Event | 17th International Conference on integrated Formal Methods - Lugano, Switzerland Duration: 7 Jun 2022 → 10 Jun 2022 https://ifm22.si.usi.ch/ |
Conference
Conference | 17th International Conference on integrated Formal Methods |
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Country/Territory | Switzerland |
City | Lugano |
Period | 07/06/2022 → 10/06/2022 |
Internet address |
Series | Lecture Notes in Computer Science |
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Volume | 13274 |
ISSN | 0302-9743 |
Keywords
- Time discretization
- Linear system
- Reachability