EMC and functional safety requirements - railway signalling applications

2009 ◽  
Author(s):  
A. Ogunsola
Keyword(s):  
Functional Safety ◽  
Safety Requirements ◽  
Railway Signalling

scholarly journals A Novel Hazard Analysis and Risk Assessment Approach for Road Vehicle Functional Safety through Integrating STPA with FMEA

2020 ◽  
Vol 10 (21) ◽  
pp. 7400
Author(s):  
Lei Chen ◽  
Jian Jiao ◽  
Tingdi Zhao
Keyword(s):  
Risk Assessment ◽  
Process Analysis ◽  
Hazard Analysis ◽  
International Standards ◽  
Functional Safety ◽  
Road Vehicles ◽  
Effect Analysis ◽  
Automotive Safety ◽  
Safety Requirements ◽  
Assessment Approach

ISO26262: 2018 is an international functional safety standard for electrical and/or electronic (E/E) systems within road vehicles. It provides appropriate safety requirements for road vehicles to avoid unreasonable residual risk according to automotive safety integrity levels (ASILs) derived from hazard analysis and risk assessment (HARA) required in the ISO26262 concept phase. Systems theoretic process analysis (STPA) seems to be designed specifically to deal with hazard analysis of modern complex systems, but it does not include risk evaluation required by most safety related international standards. So we integrated STPA into Failure Mode and Effect Analysis (FMEA) template to form a new method called system theoretic process analysis based on an FMEA template, STPAFT for shot, which could not only meet all the requirements of the concept phase in ISO26262, but also make full use of the advantages of the two methods. Through the focus of FMEA on low-level components, STPAFT can obtain more detailed causal factors (CFs), which is very helpful for derivation of safety goals (SGs) and the functional safety requirements (FSRs) in the concept phase of ISO26262. The application of STPAFT is described by the case study of fuel level estimation and display system (FLEDS) to show how the concept phase of ISO26262 could be supported by STPAFT.

Analysis of the regulatory framework for confi rmation of the functional safety requirements compliance of microprocessor-based railway automation systems

2020 ◽  
Vol 6 (4) ◽  
pp. 435-465
Author(s):  
V. Yu. Ryazanov ◽  
Keyword(s):  
Remote Control ◽  
Control Systems ◽  
Safety Management ◽  
Regulatory Framework ◽  
Point Of View ◽  
Functional Safety ◽  
Railway Transport ◽  
Safety Requirements ◽  
Automation Systems ◽  
Further Development

The article analyzes the current regulatory framework for proof of safety, quality assurance, and confi rmation of the conformity of microprocessor-based railway automation and remote control systems in the EAEU. CENELEC standards are briefl y discussed. A brief overview is provided as regards measures to ensure the required level of safety of microprocessor-based railway automation and remote control systems from the point of view of quality management of development, safety management, and confi rmation of the proper functioning of microprocessor systems. The practice of confi rming the railway transport automated process control systems comply with standards in the form of a declaration of conformity per TR CU 003/2011 has been analyzed. It is concluded that there is a need to develop a regulatory framework to ensure regulated analysis and assessment of railway automation and remote control systems following the requirements of functional safety, as well as further development of standardization documents to regulate methods for assessing functional safety.

scholarly journals Functional safety requirements of traction inverter in accordance to ISO 26262

2020 ◽  
Vol 184 ◽  
pp. 01062
Author(s):  
R Bhavana ◽  
Omsekhar Indela ◽  
Mohammed Sajid Yaragatti
Keyword(s):  
Short Circuit ◽  
Functional Safety ◽  
Iso 26262 ◽  
Safety Requirements ◽  
Automotive Systems ◽  
Safety And Reliability ◽  
Electric Traction ◽  
Electronic Controller ◽  
Short Circuit Fault ◽  
Electronic Sensors

With the improvement and development in the automotive, the safety related aspects are also becoming more important. Hence there is a stringent demand for the Functional Safety and reliability. In these years, most of the vehicles are made with electrical and electronic components and systems which include lots of Electronic Controller Units (ECUs), electronic sensors, bus systems with coding. Due to the complexity in application of these electrical, electronics and programmable electronics, it is necessary to analyze the potential risk of malfunction for automotive systems. Thus, ISO 26262 has been introduced for automotive electrical/electronic (E/E) systems which ensure the complete safety installation of all ECUs, E/E systems its technical as well as management issues. In this paper, functional safety in accordance with ISO 26262 Part 3 of an electric traction inverter is done, the Functional safety report is generated in MEDINI TOOL and the short circuit fault of traction inverter is considered for Functional safety using MATLAB/SIMULINK.

Test Methods for the Evaluation of Manufacturing Mobile Manipulator Safety

2016 ◽  
Vol 28 (2) ◽  
pp. 199-214 ◽  
Author(s):  
Jeremy A. Marvel ◽  
◽  
Roger Bostelman ◽  
Keyword(s):  
Agile Manufacturing ◽  
Test Methods ◽  
Mobile Manipulator ◽  
Mobile Manipulators ◽  
Functional Safety ◽  
Safety Requirements ◽  
Test Methodology ◽  
Safety Test ◽  
Special Cases ◽  
Manipulator Safety

[abstFig src='/00280002/11.jpg' width=""280"" text='Arm-on-AGV safety test methods' ]This paper presents a test methodology for evaluating the safety of mobile manipulators (robot arms mounted on mobile bases). This methodology addresses the safety concerns relevant to modern, agile, manufacturing practices in which mobile manipulators will play a significant role. We consider 1) the unique capabilities and anticipated uses of mobile manipulators and 2) the potential exemptions and special cases in which their behavior may be unpredictable or otherwise contrary to the safety requirements. Finally, we define metrics for assessing compliance with functional safety requirements and anticipated performance.

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