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Embedded systems are becoming ubiquitous and are subject to demanding standards in both safety and reliability. Modern vehicles, which must respect ISO 26262 standards, use up to 100 Electronic Control Unit (ECUs). Advances in microelectronics enable integration of more functions in the ECU, but at the cost of greater unreliability in hostile operating environments, such as electromagnetic fields,...
The growing complexity of modern automotive embedded systems requires new techniques for model-based design that take into consideration both software and hardware constraints, and enable verification at early stages of development. In this context, EAST-ADL has been developed as a domain-specific language dedicated to modeling functional-, software-, and hardware-architecture of automotive systems...
The development and test of advanced driver assistance systems (ADAS)present a challenge due to their complexity and dependency on other vehicle systems, initial conditions and their environment. Testing ADAS under real conditions leads to significant efforts and costs. Therefore, virtual prototyping and simulation are widely used instrumentsfor developing such complex systems. One of these useful...
Precise timing constraint modeling and analysis is a key point for the correct development of automotive electronics. EAST-ADL and AUTOSAR has been adopted as standards in automotive industry. These standards have recently adopted TADL (Time Augmented Description Language), a timing model for expressing timing constraints. Its current use highlighted different issues, mainly concerning the integration...
In the automotive industry, the Automotive Open System Architecture AUTOSAR is established as a de-facto standard and is applied in a steadily increasing number of development projects. In addition, AUTOSAR attracted the attention of other non-automotive industries, like railway, agriculture and construction machines, power generation and marine technology. The first versions of the standard successfully...
Cyberphysical (embedded) computer system availability and reliability can be modeled and assessed using the Architecture Analysis and Design Language (AADL) and its Error Model Annex. AADL can represent systems at multiple levels of abstraction. Therefore, analyses can be performed early and often throughout the development process thereby minimizing the cost and schedule impact of changes. We discuss...
In this paper we present a CO-SImulation Trace Analysis (COSITA) tool in order to analyze functional/architectural properties, in the automotive field. These properties should enhance a specific design requirement that we call functional/architectural diagnosability. The validation process is applied on a real automotive experimental embedded platform called DIAFORE based on several Electronic Control...
The verification of embedded software has become an important subject over the last years. This work presents a new semiformal verification approach called SofTPaDS. It combines assertion-based and symbolic simulation approaches for the verification of embedded software with hardware dependencies. SofTPaDS shows to be more efficient than the software model checkers in order to trace deep state spaces...
Power hardware-in-the-loop (PHIL) simulations need to be accurate to truly reflect the behavior of the systems under test. However, a PHIL simulation may result in errors or even instability due to imperfections (e.g., time delay, noise injection, phase lag, and limited bandwidth) in the power interface, particularly in high-power applications. Additionally, it is usually difficult to determine the...
The introduction of FlexRay in the automotive industry as well as the standardization efforts for the hardware and software architecture rise different challenges: How to efficiently integrate the new services in the system, how to validate the communication architecture with respect to the effects influencing the network? The research project TEODACS aims at answering these questions. We present...
Electronic control units and on-board networks for automotive applications cover a big variety of functions that in many cases are responsible of safety critical behavior of the vehicle. Safety needs and goals claim that the software involved in such functions be designed by adopting opportune methods and practices. The paper presents a survey on most of these practices in the light of emerging standards.
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