Integration of functional safety systems on the Daniel K. Inouye Solar Telescope

2016 ◽  
Author(s):  
Timothy R. Williams ◽  
Robert P. Hubbard ◽  
Steve Shimko
Keyword(s):  
Solar Telescope ◽  
Functional Safety ◽  
Safety Systems

scholarly journals Integrated security levels and analysis of their implications to the maintenance

2014 ◽  
Vol 10 (2) ◽  
pp. 33-42 ◽  
Author(s):  
Marek Korytar ◽  
Darja Gabriska
Keyword(s):  
Functional Safety ◽  
Technological Processes ◽  
Security Levels ◽  
Safety Systems

Abstract The article describes the main indicators of the functional safety systems, which are related to the safety of technological processes. There is also an evaluated example in accordance with the recommendations of the standards IEC61508 and IEC 61511. In this paper, we analyzed their dependence on the organization of maintenance and diagnosis of these systems.

scholarly journals Functional Safety Concept to Support Hazard Assessment and Risk Management in Water-Supply Systems

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 947
Author(s):  
Barbara Tchórzewska-Cieślak ◽  
Katarzyna Pietrucha-Urbanik ◽  
Mohamed Eid
Keyword(s):  
Decision Making ◽  
Water Supply ◽  
Water Contamination ◽  
Supply System ◽  
Water Supply Systems ◽  
Functional Safety ◽  
Safety Concept ◽  
Safety Systems ◽  
Supply Systems

Within the frame of upgrading and modernisation of the Water Supply System (WSS), our work is focussing on the safety systems/devices implemented or that should be implemented in the WSS. The implementation of safety systems is supposed to reduce hazard occurrence and hazardous consequences in case of a WSS unsafe disruption. To assess this reduction, we preconise the use of the safety integrity levels standards. The implementation of the safety systems/devices is undertaken on the ground of the multi-barriers safeguard approach. The “Water Contamination Hazard” is considered in the paper. A case study is presented, assessed and conclusions are drawn. The methodology presented in the paper and the results of the case study assessment will contribute to the decision-making regarding the upgrading of the safety and the performance of the WSS.

scholarly journals Hidden Security Breaches in Automatic Control of Technological Processes

2021 ◽  
Vol 25 (2) ◽  
pp. 31-39
Author(s):  
Marcin Szuster ◽  
Bartłomiej Kozioł
Keyword(s):  
Control Systems ◽  
Machine Tools ◽  
Functional Safety ◽  
Validation Process ◽  
New Approach ◽  
Industrial Plants ◽  
Security Breaches ◽  
Twin Model ◽  
Sequence Of Events ◽  
Safety Systems

The progressing automation and robotization in the industrial plants as well as the increasing complexity of the control systems of integrated machines make it necessary to constantly improve the functional safety of machines through the correct validation of safety systems. Despite the validation process carried out, the potential software errors may reveal during the usage of the machine as hidden security breaches. The article presents examples of security breaches of real machine tools and attempts to implement solutions of automated mechanisms for detecting security problems. Another aspect of the article is the new approach for detecting hidden security breaches. Using the „digital twin” model of the machine, a program that generates a sequence of events for testing control systems, and the use of a virtual reality (visual verification of the safety programs), it is possible to maximize the functional safety functions of the machine.

scholarly journals Safety in modular process plants: demonstration of safety concepts

2021 ◽  
Author(s):  
Florian Pelzer ◽  
Anselm Klose ◽  
Jonas Miesner ◽  
Martin Schmauder ◽  
Leon Urbas
Keyword(s):  
Control System ◽  
Process Control System ◽  
Process Industry ◽  
Flexible Production ◽  
Functional Safety ◽  
Basic Process ◽  
Working Environments ◽  
Strong Focus ◽  
Process Plants ◽  
Safety Systems

AbstractThe modularization of process plants addresses the need for flexible production options in the process industry. In order to maintain the advantages of the adaptability of modular plants, an adaptation of established engineering methods and procedures to their dynamic context of use is required. This paper describes the development and the features of a demonstrator, which makes it possible to investigate aspects of modular plant topology, the design of modular process units, and the functional safety of modules and plants. During the engineering of the modules, modular planning principles are applied and evaluated with respect to the requirements for functional safety and with a strong focus on the modification of safety systems through the exchange of PEAs and FEAs. For the design and modification of the safety systems, a safety life cycle, which meets the requirements of modular automation and takes the provisions of IEC 61508 and IEC 61511 into account, is applied. Practical insights into the construction and the implementation of the distributed Safety Instrumented System as well as the Basic Process Control System are described. In addition to the validation of safety concepts related to the interconnection of Safety Instrumented Functions, the demonstrator is used to study human working environments in modular plants.

scholarly journals Safety of Machinery: Significant Differences in Two Widely Used International Standards for the Design of Safety-Related Control Systems

Safety ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. 76 ◽  
Author(s):  
Chinniah ◽  
Nix ◽  
Jocelyn ◽  
Burlet-Vienney ◽  
Bourbonnière ◽  
...  
Keyword(s):  
Control Systems ◽  
International Standards ◽  
Functional Safety ◽  
Operation And Maintenance ◽  
Hazard Zone ◽  
Safety Systems ◽  
Different Levels

Industrial machines are known to possess many hazards. There are many laws, regulations, standards and practices that aim at ensuring that machines are safe for different workers performing various tasks including operation and maintenance. Safeguards protect workers by stopping hazardous motion when actuated. Those safeguards are integrated into machinery using two widely used international standards for functional safety. However, these standards have some significant differences although they are both based on similar principles. This paper explores those differences and their potential impacts. Subjectivity in the specification and design of safety systems, based on the differences, can lead to different levels of reliability in the safety systems even when considering the same hazard zone of machinery based on which standard is used.

scholarly journals Designing Control and Protection Systems with Regard to Integrated Functional Safety and Cybersecurity Aspects

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2227
Author(s):  
Marcin Śliwiński ◽  
Emilian Piesik
Keyword(s):  
Risk Analysis ◽  
Safety Management ◽  
Quantitative Information ◽  
Probabilistic Modelling ◽  
Functional Safety ◽  
Safety Hazards ◽  
Safety Integrity Level ◽  
Dependent Failures ◽  
Safety Systems ◽  
Methodological Aspects

This article addresses current problems of risk analysis and probabilistic modelling for functional safety management in the life cycle of safety-related systems. Two main stages in the lifecycle of these systems are distinguished, namely the design and operation. The risk analysis and probabilistic modelling differ in these stages in view of available knowledge and data. Due to the complexity and uncertainty involved, both qualitative and quantitative information can be useful in risk analysis and probabilistic modelling. Some methodological aspects of the functional safety assessment are outlined that include modelling of dependent failures or cybersecurity and verifying the safety integrity level (SIL) under uncertainty. It is illustrated how the assumptions in the process of risk analysis and probabilistic modelling influence results obtained and, therefore, potentially the decisions taken in functional safety management. Programmable control and safety systems play an important role in mitigating and controlling risks in the operation of hazardous installations. This paper presents ways to deal with safety hazards involving such systems to be considered in risk analysis and integrated functional safety and cybersecurity management.

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