A Model for Hierarchical Open Real-Time Systems
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Authors
Waez, MD Tawhid Bin
Date
2015-09-26
Type
thesis
Language
eng
Keyword
Hierarchical Systems , Model-Based Development , Open Systems , Automotive Systems , State-Space Reduction , Survey , Compositional Analysis , Timed Automata , Compositional Modeling , Case Study , Game Theory , Timed Games , Timed Process Automata , Real-Time Systems
Alternative Title
Abstract
Introducing automated formal methods for large industrial real-time systems is an important research challenge. We propose timed process automata for modeling and analysis of time-critical systems which can be open, hierarchical, and dynamic. The model offers two essential features for large industrial systems: (i) compositional modeling with reusable designs for different contexts, and (ii) automated state-space reduction technique. Timed process automata model dynamic networks of continuous-time communicating control processes which can activate other processes. We show how to automatically establish safety and reachability properties of timed process automata by reduction to solving timed games. To mitigate the state-space explosion problem, an automated state-space reduction technique using compositional reasoning and aggressive abstractions is also proposed. Before working on timed process automata, we did a survey on semantics, decision problems, variants, and tools of timed automata. The insights gained from this survey motivated us to use timed game theory and Uppaal Tiga in a couple of industrial case studies and the development of timed process automata. Both the case studies show that state-space explosion is a severe problem for timed games. Suitable abstractions, however, dramatically improve the scalability of timed games in one case study. These case studies motivate the development of timed process automata and an automatable state-space reduction technique for them based on aggressive abstraction.
Description
Thesis (Ph.D, Computing) -- Queen's University, 2015-09-24 23:23:22.625
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Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
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Creative Commons - Attribution - CC BY
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
Creative Commons - Attribution - CC BY
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.