scholarly journals Functional Safety Concept Generation within the Process of Preliminary Design of Automated Driving Functions at the Example of an Unmanned Protective Vehicle

2019 ◽  
Vol 1 (1) ◽  
pp. 2863-2872
Author(s):  
Robert Graubohm ◽  
Torben Stolte ◽  
Gerrit Bagschik ◽  
Markus Steimle ◽  
Markus Maurer
Keyword(s):  
Argument Structure ◽  
Functional System ◽  
Preliminary Design ◽  
Functional Safety ◽  
Concept Generation ◽  
Safety Concept ◽  
Automated Driving ◽  
System Architectures ◽  
Early Design ◽  
Iso 26262

AbstractStructuring the early design phase of automotive systems is an important part of efficient and successful development processes. Today, safety considerations (e.g., the safety life cycle of ISO 26262) significantly affect the course of development. Preliminary designs are expressed in functional system architectures, which are required to form safety concepts. Thus, mapping tasks and work products to a reference process during early design stages is an important part of structuring the system development. This contribution describes the systematic creation and notation of the functional safety concept within the concept phase of development of an unmanned protective vehicle within the research project aFAS. Different stages of preliminary design and dependencies between them are displayed by the work products created and used. The full set of functional safety requirements and an excerpt of the safety argument structure of the SAE level 4 application are presented.

scholarly journals Functional Safety of Automated Driving Systems: Does ISO 26262 Meet the Challenges?

2016 ◽  
pp. 387-416 ◽  
Author(s):  
Helmut Martin ◽  
Kurt Tschabuschnig ◽  
Olof Bridal ◽  
Daniel Watzenig
Keyword(s):  
Functional Safety ◽  
Automated Driving ◽  
Iso 26262

Functional system architectures towards fully automated driving

2016 ◽  
Author(s):  
Omer Sahin Tas ◽  
Florian Kuhnt ◽  
J. Marius Zollner ◽  
Christoph Stiller
Keyword(s):  
Functional System ◽  
Automated Driving ◽  
System Architectures ◽  
Fully Automated Driving

scholarly journals Power Supply Platform and Functional Safety Concept Proposals for a Powertrain Transmission Electronic Control Unit

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1580
Author(s):  
Diana Raluca Biba ◽  
Mihaela Codruta Ancuti ◽  
Alexandru Ianovici ◽  
Ciprian Sorandaru ◽  
Sorin Musuroi
Keyword(s):  
Electronic Control Unit ◽  
Control Unit ◽  
Functional Safety ◽  
Electronic Control ◽  
Safety Concept ◽  
Critical System ◽  
Worst Case ◽  
Design Guideline ◽  
Iso 26262 ◽  
Safety Critical

In the last decade, modern vehicles have become very complex, being equipped with embedded electronic systems which include more than a thousand of electronic control units (ECUs). Therefore, it is mandatory to analyze the potential risk of automotive systems failure because it could have a significant impact on humans’ safety. This paper proposes a novel, functional safety concept at the power management level of a system basis chip (SBC), from the development phase to system design. In the presented case, the safety-critical application is represented by a powertrain transmission electronic control unit. A step-by-step design guideline procedure is presented, having as a focus the cost, safety, and performance to obtain a robust, cost-efficient, safe, and reliable design. To prove compliance with the ISO 26262 standard, quantitative worst-case evaluations of the hardware have been done. The assessment results qualify the proposed design with automotive safety integrity levels (ASIL, up to ASIL-D). The main contribution of this paper is to demonstrate how to apply the functional safety concept to a real, safety-critical system by following the proposed design methodology.

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.

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