AltaRica 3 Based Models for ISO 26262 Automotive Safety Mechanisms

2014 ◽  
pp. 123-136 ◽  
Author(s):  
Abraham Cherfi ◽  
Antoine Rauzy ◽  
Michel Leeman
Keyword(s):  
Automotive Safety ◽  
Iso 26262

ISO 26262 Concept Phase Analysis on Distributed Electro-Hydraulic Braking System: The Influence of System Architecture on ASIL Decomposition

2014 ◽  
Author(s):  
Zhizhong Wang ◽  
Liangyao Yu ◽  
Ning Pan ◽  
Lei Zhang ◽  
Jian Song
Keyword(s):  
System Architecture ◽  
Event Analysis ◽  
Automotive Safety ◽  
System Architectures ◽  
Iso 26262 ◽  
Braking System ◽  
Safety Integrity Level ◽  
Actuator System ◽  
Hazardous Event ◽  
Wire System

The Distributed Electro-hydraulic Braking system (DEHB) is a wet type brake-by-wire system. As a safety critical automotive electrical and/or electronic (E/E) system, DEHB shall be designed under the guideline of ISO 26262 in order to avoid unreasonable risk due to the malfunctions in the item. This paper explores how the Automotive Safety Integrity Level (ASIL) decomposition in the concept phase is influenced by the system architectures of DEHB. Based on a typical hazardous event, analysis on DEHB with the same system architecture as the Electro-mechanical Braking system (EMB) is carried out, which is taken as the basis for comparison. Two types of DEHB with different system architectures are then analyzed. Results show that the adoption of hydraulic backup enables ASIL decomposition in the pedal unit. The adoption of both hydraulic backup and normally open balance valves offers the opportunity to perform ASIL decomposition in the brake actuator system of DEHB.

Hardware-in-the-Loop Simulation of Functional Safety Compliant Electric Power Steering System

2015 ◽  
Vol 781 ◽  
pp. 500-503
Author(s):  
Kyung Jung Lee ◽  
Hyun Sik Ahn
Keyword(s):  
Electric Power ◽  
Steering System ◽  
Functional Safety ◽  
Hardware In The Loop ◽  
Electric Power Steering ◽  
Automotive Safety ◽  
Iso 26262 ◽  
Power Steering ◽  
Safety Integrity Level ◽  
Electric Power Steering System

In this paper, we propose a hardware-in-the-loop simulation (HILS) for functional safety compliant electric power steering (EPS) system. The proliferation of electric and electronic systems in vehicles has brought the new automotive standard ISO 26262 for the safety of functions. The proposed EPS system should be Automotive Safety Integrity Level (ASIL) D compliant, which is the highest ASIL level. Therefore, EPS system complies with functional safety and HILS is configured to verify performance of functional safety compliant EPS system.

scholarly journals ISO 26262 - The Relevance and Importance of Qualitative and Quantitative Methods for Safety and Reliability Issues Regarding the Automotive Industry

2010 ◽  
Vol 14-15 (1) ◽  
pp. 165-176
Author(s):  
Marco Schlummer ◽  
Dirk Althaus ◽  
Andreas Braasch ◽  
Arno Meyna
Keyword(s):  
Risk Assessment ◽  
Automotive Industry ◽  
Quantitative Methods ◽  
Hazard Analysis ◽  
Functional Safety ◽  
Automotive Safety ◽  
Iso 26262 ◽  
Qualitative And Quantitative ◽  
Qualitative And Quantitative Methods ◽  
Safety And Reliability

ISO 26262 - The Relevance and Importance of Qualitative and Quantitative Methods for Safety and Reliability Issues Regarding the Automotive IndustrySafety and reliability are key issues of today's and future automotive developments, where the involved companies have to deal with increasing functionality and complexity of software-based car functions. New functionalities cannot only be found in the area of driver assistance - most of the new car functions are and will be safety related as for example in vehicle dynamics control or active and passive safety systems. The development and integration of those functions will strengthen the need of safe processes during the system development. The new upcoming automotive standard on functional safety (ISO 26262), which is derived from the generic functional safety standard IEC 61508 to comply with the specific needs to the application sector of E/E-systems in road vehicles, will provide guidance to avoid the increasing risks from systematic faults and random hardware faults by providing feasible processes and requirements. It is evident that aspects and methods of the safety and reliability engineering are implemented and suited methods are performed in the development process at an early stage. This is one of the requirements of the new ISO 26262, which introduces a so called automotive safety lifecycle to handle all those activities that are necessary to guarantee the functional safety of automotive E/E-systems. In the following, a brief overview of the upcoming automotive standard, its new safety life cycle and the connected activities in order to ensure functional safety for safety related systems will be given. The main aim of this paper is to show the relevance and importance of one of the major tasks within the ISO 26262: the process of the hazard analysis and risk assessment as it is currently performed in the automotive industry. With the help of an example from the automotive sector, the basic steps of this method to determine the automotive safety integrity level (ASIL) are explained. Depending on the ASIL, safety requirements need to be derived as a result of the new standard regarding safety integrity attributes. Furthermore, the connection of the automotive functional safety process with methods for qualification and quantification of safety and reliability issues will be explained in this paper. The Fault Tree Analysis will be used to exemplify one of these methods which are applied subsequent to the hazard analysis and risk assessment and which make a contribution to the validation and verification of the safety process.

scholarly journals Enabling ISO 26262 Compliance with Accelerated Diagnostic Coverage Assessment

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 732
Author(s):  
Frederico Ferlini ◽  
Laio Oriel Seman ◽  
Eduardo Augusto Bezerra
Keyword(s):  
Development Process ◽  
Fault Injection ◽  
Functional Verification ◽  
Description Language ◽  
Automotive Safety ◽  
Iso 26262 ◽  
Safety Integrity Level ◽  
Hardware Description ◽  
Small Parts ◽  
Vehicle Development Process

Modern vehicles are integrating a growing number of electronics to provide a safer experience for the driver. Therefore, safety is a non-negotiable requirement that must be considered through the vehicle development process. The ISO 26262 standard provides guidance to ensure that such requirements are implemented. Fault injection is highly recommended for the functional verification of safety mechanisms or to evaluate their diagnostic coverage capability. An exhaustive analysis is not required, but evidence of best effort through the diagnostic coverage assessment needs to be provided when performing quantitative evaluation of hardware architectural metrics. These metrics support that the automotive safety integrity level—ranging from A (lowest) to D (strictest) levels—was obeyed. In this context, this paper proposed a verification solution in order to build an approach that can accelerate the diagnostic coverage assessment via fault injection in the semiconductor level (i.e., hardware description language). The proposed solution does not require any modification of the design model to enable acceleration. Small parts of the OpenRISC architecture (namely a carry adder, the Tick Timer peripheral, and the exception block) were used to illustrate the methodology.

scholarly journals Functional Safety BMS Design Methodology for Automotive Lithium-Based Batteries

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6942
Author(s):  
David Marcos ◽  
Maitane Garmendia ◽  
Jon Crego ◽  
José Antonio Cortajarena
Keyword(s):  
Design Methodology ◽  
International Standards ◽  
Automotive Application ◽  
Special Focus ◽  
Battery Management ◽  
Functional Safety ◽  
Automotive Safety ◽  
Iso 26262 ◽  
Safety Integrity Level ◽  
Hazard And Risk

The increasing use of lithium batteries and the necessary integration of battery management systems (BMS) has led international standards to demand functional safety in electromobility applications, with a special focus on electric vehicles. This work covers the complete design of an enhanced automotive BMS with functional safety from the concept phase to verification activities. Firstly, a detailed analysis of the intrinsic hazards of lithium-based batteries is performed. Secondly, a hazard and risk assessment of an automotive lithium-based battery is carried out to address the specific risks deriving from the automotive application and the safety goals to be fulfilled to keep it under control. Safety goals lead to the technical safety requirements for the next hardware design and prototyping of a BMS Slave. Finally, the failure rate of the BMS Slave is assessed to verify the compliance of the developed enhanced BMS Slave with the functional safety Automotive Safety Integrity Level (ASIL) C. This paper contributes the design methodology of a BMS complying with ISO 26262 functional safety standard requirements for automotive lithium-based batteries.

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