Software Technology for Implementing Reusable, Distributed Control Systems

Heck, B.S.; Wills, Linda M.; Vachtsevanos, George

doi:10.1007/978-90-481-3018-4_11

Cited by 53 publications

(29 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…From this perspective, monolithic and modular architectures are not, in our view, properly considered to be purely distributed. We adopt the view that distributed architecture is a 'flat' system organization where global functions emerge through the collective actions of individual agents and are not, at least directly, guided by higher-level, external supervisors [22].…”

Section: Purely Distributed Architecturementioning

confidence: 99%

Supervisor Localization: A Top-Down Approach to Distributed Control of Discrete-Event Systems

Cai

Wonham

2009

AIP Conference Proceedings

150

View full text Add to dashboard Cite

We study distributed control design for discrete-event systems (DES) in the framework of supervisory control theory. Our DES comprise multiple agents, acting independently except for specifications on 'global' behavior. The central problem investigated is how to synthesize 'local' controllers for individual agents such that the resultant controlled behavior is identical with that achieved by global supervision.The investigation is carried out with both language-and state-based models. In the language-based setting, a supervisor localization algorithm is developed that solves the problem in a top-down fashion: first, compute a global supervisor, then decompose it into local controllers. For large-scale DES where a global supervisor might not be feasibly computable owing to state explosion, a decomposition-aggregation solution procedure is established. In the state-based setting, specifically that of 'state tree structures' (STS), a counterpart supervisor localization algorithm is developed having potential to exploit the known efficiency of STS for large-DES control design.ii Acknowledgements It is my great honour and pleasure to study under the supervision of Professor W.M.Wonham, to whom I would like to express my deepest gratitude for his patient guidance and inspiring comments throughout the course of study. Learning closely from him, I have begun to understand and appreciate the rigorous attitude and systematic methodology toward research, the far-reaching value being unmeasurable in terms of the amount of knowledge. In addition, I am grateful to him and his wife, Anne, for their warm care and help in life.

show abstract

Section: Purely Distributed Architecturementioning

confidence: 99%

Supervisor Localization: A Top-Down Approach to Distributed Control of Discrete-Event Systems

Cai

Wonham

2009

AIP Conference Proceedings

150

View full text Add to dashboard Cite

show abstract

“…Optimisation is not easy on a factory level, not to mention the whole supply chain. Current research is focusing on raising control systems to a level that allows higher flexibility and efficiency due to better information integration between systems and better software engineering approaches (e.g., Heck et al [6]). …”

Section: Illegal Logging and Degradation Of Biodiversity Illegalmentioning

confidence: 99%

Green Supply Chains: Using Information Integration for Sustainable Development

Strobel

2009

2009 International Conference on Complex, Intelligent and Software Intensive Systems

View full text Add to dashboard Cite

The current development of global economies and societies is regarded as being highly unsustainable. This paper analyses the current situation. Instead of simplistic metrics that take only snapshots of the life-cycle of a product into consideration, an approach is introduced that covers the whole supply chain. The core idea is that end-to-end transparency, specific data models, a process architecture, modern data management and analysis techniques are the key to make informed decisions, optimisations and to execute international policies. The particular role of ICT in such a future economy is discussed.

show abstract

“…A common perspective and security solution to the control systems is essential in the design of these systems. New approaches and skills for software development of distributed control systems architectures are required to ensure that software is stable and reliable to avoid hazard conditions (Heck, Wills, & Vatchtsevanos, 2003). Control methods are essential in distributed software development and E-commerce applications (Hellerstein, Diao, Parekh, & T ilbury, 2005).…”

Section: System Development Skillsmentioning

confidence: 99%

Improving Security for SCADA Control Systems

Hentea¹

2008

IJIKM

View full text Add to dashboard Cite

Executive SummaryThe continuous growth of cyber security threats and attacks including the increasing sophistication of malware is impacting the security of critical infrastructure, industrial control systems, and Supervisory Control and Data Acquisition (SCADA) control systems. The reliable operation of modern infrastructures depends on computerized systems and SCADA systems. Since the emergence of Internet and World Wide Web technologies, these systems were integrated with business systems and became more exposed to cyber threats. There is a growing concern about the security and safety of the SCADA control systems. The Presidential Decision Directive 63 document established the framework to protect the critical infrastructure and the Presidential document of 2003, the National Strategy to Secure Cyberspace stated that securing SCADA systems is a national priority. T he critical infrastructure includes telecommunication, transportation, energy, banking, finance, water supply, emergency services, government services, agriculture, and other fundamental systems and services that are critical to the security, economic prosperity, and social well-being of the public. The critical infrastructure is characterized by interdependencies (physical, cyber, geographic, and logical) and complexity (collections of interacting components). Therefore, information security management principles and processes need to be applied to SCADA systems without exception. Critical infrastructure disruptions can directly and indirectly affect other infrastructures, impact large geographic regions, and send ripples throughout the national and global economy. For example, under normal operating conditions, the electric power infrastructure requires fuels (natural gas and petroleum), transportation, water, banking and finance, telecommunication, and SCADA systems for monitoring and control.In this paper, we provide an analysis of key developments, architecture, potential vulnerabilities, and security concerns including recommendations toward improving security for SCADA control systems. We discuss the most important issues concerning the security of SCADA systems including a perspective on enhancing security of these systems. We briefly describe the SCADA architecture, and identify the attributes that increase the complexity of these systems including the key developments that mark the evolution of the SCADA control systems along with the growth of potential vulnerabilities and security concerns. Then, we provide recommendations toward an enhanced security for SCADA control systems. More efforts should be planned on reducing the vulnerabilities and improving the security operations of these systems. It is necessary to address not only the individual vulnerabilities, but the breadth of risks that can interfere with critical operations.We describe key requirements and features needed to improve the security of the current SCADA control systems. For example, in assessing the risk for SCADA systems, use of general methods for risk analysis inclu...

show abstract

Software Technology for Implementing Reusable, Distributed Control Systems

Cited by 53 publications

References 26 publications

Supervisor Localization: A Top-Down Approach to Distributed Control of Discrete-Event Systems

Supervisor Localization: A Top-Down Approach to Distributed Control of Discrete-Event Systems

Green Supply Chains: Using Information Integration for Sustainable Development

Improving Security for SCADA Control Systems

Contact Info

Product

Resources

About

Software Technology for Implementing Reusable, Distributed Control Systems

Cited by 53 publications

References 26 publications

Supervisor Localization: A Top-Down Approach to Distributed Control of Discrete-Event Systems

Supervisor Localization: A Top-Down Approach to Distributed Control of Discrete-Event Systems

&#147;Green&#148; Supply Chains: Using Information Integration for Sustainable Development

Improving Security for SCADA Control Systems

Contact Info

Product

Resources

About

Green Supply Chains: Using Information Integration for Sustainable Development