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Technical Paper

Design & Safety Considerations for Electrical Power Steering (EPS) Systems Based on Automotive Safety Integrity Levels

2010-04-12
2010-01-0994
Recently, Electric Power Steering (EPS) Systems are gaining popularity and acceptance among the auto manufacturers and consumers. When compared to the hydraulic power steering systems, increased fuel efficiency is one of the most deserving advantages of the EPS systems. However, elimination of hydraulic fluid is an environmentally safer alternative. In a hydraulic power steering system, hydraulic pump is turned on when the engine is running and power is consumed regardless the vehicle is steered or not. The hydraulic pump, piping and hoses add extra weight and labor cost to the system. In a vehicle with electric power steering, the steering system can be tuned easily for steering feel and the ability to return to the center position. It can also be easily adapted to various road conditions including the highway and city driving conditions. Moreover, the electric power steering is an integral part of the vehicle dynamics and stability control systems.
Technical Paper

An Adaptable Software Safety Process for Automotive Safety-Critical Systems

2004-03-08
2004-01-1666
In this paper, we review existing software safety standards, guidelines, and other software safety documents. Common software safety elements from these documents are identified. We then describe an adaptable software safety process for automotive safety-critical systems based on these common elements. The process specifies high-level requirements and recommended methods for satisfying the requirements. In addition, we describe how the proposed process may be integrated into a proposed system safety process, and how it may be integrated with an existing software development process.
Technical Paper

DOE Guidelines on Hydrogen Safety

2005-04-11
2005-01-0010
Hydrogen is the most plentiful gas in the universe. However hydrogen never occurs naturally, always combines with other elements such as oxygen and carbon [1]. Hydrogen is the ultimate clean energy carrier once it is separated from other elements [11]. Moreover hydrogen can easily be generated from renewable energy sources. Hydrogen is also nonpolluting, and forms water as a harmless byproduct during the oxidation process. Safe practices in the production, storage, distribution, and use of hydrogen are essential components of a hydrogen economy [2]. A catastrophic failure in any hydrogen project could irreparably damage the entire transition strategy. The safety program element delineates the steps that the hydrogen, fuel cells & infrastructure technologies program shall ensure that all projects are performed in a safe manner.
Technical Paper

Identifying and Understanding Relevant System Safety Standards for use in the Automotive Industry

2003-03-03
2003-01-1293
A new generation of software-controlled vehicle systems promises to help enhance vehicle safety, performance and comfort. As these new, often complex systems are added, system safety programs are followed to help eliminate potential hazards. An important part of planning for a safety program is to understand applicable standards. This paper identifies, reviews, categorizes, and summarizes the importance of several applicable standards for incorporation in a system safety program.
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