Optimal planning for architecture-based self-adaptation via model checking of stochastic games

Author(s):  
Javier Cámara ◽  
David Garlan ◽  
Bradley Schmerl ◽  
Ashutosh Pandey
2016 ◽  
Vol 10 (4) ◽  
pp. 1-28 ◽  
Author(s):  
Javier Cámara ◽  
Gabriel A. Moreno ◽  
David Garlan ◽  
Bradley Schmerl

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 212 ◽  
Author(s):  
Xiaomin Wei ◽  
Yunwei Dong ◽  
Pengpeng Sun ◽  
Mingrui Xiao

As safety-critical systems, grid cyber-physical systems (GCPSs) are required to ensure the safety of power-related systems. However, in many cases, GCPSs may be subject to uncertain and nondeterministic environmental hazards, as well as the variable quality of devices. They can cause failures and hazards in the whole system and may jeopardize system safety. Thus, it necessitates safety analysis for system safety assurance. This paper proposes an architecture-level safety analysis approach for GCPSs applying the probabilistic model-checking of stochastic games. GCPSs are modeled using Architecture Analysis and Design Language (AADL). Random errors and failures of a GCPS and nondeterministic environment behaviors are explicitly described with AADL annexes. A GCPS AADL model including the environment can be regarded as a game. To transform AADL models to stochastic multi-player games (SMGs) models, model transformation rules are proposed and the completeness and consistency of rules are proved. Property formulae are formulated for formal verification of GCPS SMG models, so that occurrence probabilities of failed states and hazards can be obtained for system-level safety analysis. Finally, a modified IEEE 9-bus system with grid elements that are power management systems is modeled and analyzed using the proposed approach.


2019 ◽  
Vol 756 ◽  
pp. 1-18 ◽  
Author(s):  
Shirin Baghoolizadeh ◽  
Ali Movaghar ◽  
Negin Majidi

Author(s):  
Marta Kwiatkowska ◽  
Gethin Norman ◽  
David Parker

The design and control of autonomous systems that operate in uncertain or adversarial environments can be facilitated by formal modeling and analysis. Probabilistic model checking is a technique to automatically verify, for a given temporal logic specification, that a system model satisfies the specification, as well as to synthesize an optimal strategy for its control. This method has recently been extended to multiagent systems that exhibit competitive or cooperative behavior modeled via stochastic games and synthesis of equilibria strategies. In this article, we provide an overview of probabilistic model checking, focusing on models supported by the PRISM and PRISM-games model checkers. This overview includes fully observable and partially observable Markov decision processes, as well as turn-based and concurrent stochastic games, together with associated probabilistic temporal logics. We demonstrate the applicability of the framework through illustrative examples from autonomous systems. Finally, we highlight research challenges and suggest directions for future work in this area. Expected final online publication date for the Annual Review of Control, Robotics, and Autonomous Systems, Volume 5 is May 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.


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