scholarly journals Integrating Model Checking With SysML in Complex System Safety Analysis

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 16561-16571 ◽  
Author(s):  
Hongli Wang ◽  
Deming Zhong ◽  
Tingdi Zhao ◽  
Fuchun Ren
Keyword(s):  
Complex System ◽  
Model Checking ◽  
Safety Analysis ◽  
System Safety

scholarly journals Safety Analysis of AADL Models for Grid Cyber-Physical Systems via Model Checking of Stochastic Games

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 212 ◽  
Author(s):  
Xiaomin Wei ◽  
Yunwei Dong ◽  
Pengpeng Sun ◽  
Mingrui Xiao
Keyword(s):  
Model Checking ◽  
Stochastic Games ◽  
Safety Analysis ◽  
Cyber Physical Systems ◽  
System Level ◽  
Probabilistic Model Checking ◽  
Critical Systems ◽  
System Safety ◽  
Physical Systems ◽  
Analysis And Design

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.

System safety assessment based on STPA and model checking

2018 ◽  
Vol 109 ◽  
pp. 130-143 ◽  
Author(s):  
Alheri Longji Dakwat ◽  
Emilia Villani
Keyword(s):  
Model Checking ◽  
Safety Assessment ◽  
System Safety

System Safety Analysis Method Based on Real-Time Online Risk Monitoring Technology

2018 ◽  
Author(s):  
Sijuan Chen ◽  
Zhijian Zhang ◽  
He Wang ◽  
Min Zhang ◽  
Huazhi Zhang ◽  
...  
Keyword(s):  
Real Time ◽  
Dynamic Characteristics ◽  
Safety Analysis ◽  
System Component ◽  
Analysis Method ◽  
System Safety ◽  
Monitoring Technology ◽  
The Real ◽  
Online Risk ◽  
Risk Monitoring

In the continuous operation process of Nuclear Power Plant (NPP), its configuration is full of variety over time because of the system’s dynamic characteristics. There is a great need to update the risk/safety analysis models when it becomes necessary to reflect those dynamic characteristics of the system/component. Most of the current methods for risk/safety analysis belong to the scope of safety pre-analyzing, which analyzes the system risk/safety before system being in service. The main purpose of these safety pre-analyzing is to guide system design and optimization, but the real-time operational risk/safety analysis of NPPs is considered little. In order to know well the real-time risk/safety for system, a System Safety Analysis Method based on Real-time Online Risk Monitoring Technology is proposed. The safety risk model is established based on the modular fault tree that is used to represent logic structure of system. The real-time risk/safety is monitored according to the correspondence monitoring signal or data of component/system. Simultaneously the method can account for the change of risks based on the established mapping relationship between the state transition rules and corresponding risk/safety model updating rules. Finally, a case monitoring the safety for the system of two redundant pumps was used to demonstrate the effectiveness of the method.

Sign in / Sign up

Export Citation Format

Share Document