Search Results

This paper shows the design of a low-cost platform for learning automobile software development in high education and research institutions. In a host-target development scheme, the platform is made up of software and hardware components. The development platform supplies the required tool-chain to design and implement ECU embedded software. Moreover, the execution platform provides a hardware solution to emulate automobile E/E architectures. The overall setup aims to explain the automobile software development process over V-cycle including analysis of user requirements, logical and technical system architecture, design, and implementation of software components and testing. The capabilities and limitations of our proposed low-cost platform were also investigated throughout three experiments using the OSEK-VDX standard and Model-Based Design (MBD) concept.

Automotive industry is looking for new design and product development practices to become more competitive. Challenges in current global market have often included sustainable development, environmental regulation and innovative solution to reach customer needs. Today, carmakers are striving to take competitive advantages over global marketplace. Model-Based-Design (MBD) seems to be a feasible answer to improve software development practices in automotive industry. Furthermore, it has been reported as a novel development approach to develop advanced driver assistance systems (ADAS). Among ADAS technologies often required to reduce driver fatigue is Electric Power Assisted Steering (EPAS). By using an auxiliary servomotor, it can reduce significantly driver effort in parking maneuvers. In this scenario, this paper aims to describe how MBD can be used to design EPAS control system.

The continuous growth of market for Advanced Driver Assistance Systems based on image processing features leads to the advance of the applied techniques, increasing thus the driving safety. Mostly of the edge detection algorithms are traditional approaches, and to achieve improvements it is necessary to combine different methods. The purpose of this work is to implement a strategy for road lanes detection using the traditional Canny operator. Oriented filters are used to remove unnecessary information and vehicle’s yaw rate signal is used to adaptively correct the filter orientation according to the lane boundaries directions. In sequence, morphological filters using dilation and analysis of connected components are applied in order to remove the noise components of the edge detection stage.

Modern cars contain more and more safety-relevant features which require addressing safety aspects during all development phases: on the functional level, on the architectural level, during integration as well as throughout the verification. The workflow of designing safe and reliable automotive embedded systems start with appropriate requirements definitions. According to the automotive safety standard ISO 26262, functional as well as non-functional threats need to be addressed. Non-functional aspects of safe software include a sound and safe timing of the software. The right methods, tools and standards enable OEMs and suppliers developing and providing applications which meet their timing requirements and a high level of quality. We present with this paper some important aspects related to timing in automotive embedded systems as well as the major standards such as TIMMO and AUTOSAR.

Model-Based Design (MBD) has been widely used for automotive embedded software design. Automobile manufacturers and suppliers have often underlined the importance of an unified approach for electrical and electronic (E/E) system design. In this scenario, MBD can provide a mutual benefit for stakeholders due to the share of information, workflow, and tool-chain. In this paper, we highlight MBD application for automotive Exterior Lighting System (ELS) design. In fact, ELS is an event-driven control system typically needed for car lighting and signalization, in particular at night. Furthermore, this system is mandatory for every road vehicle according to current Brazilian laws and legislation. Also, it provides safety drive preventing car accidents and pedestrian injury. In this context, we present how to boost ELS design using MBD concepts. ELS was developed in three MBD workflow (Model-In-the-Loop, Software-In-the-Loop, and Processor-In-the-Loop), from supplier’s viewpoint.

The increasing application of embedded electronic components in vehicles brings the need to use diagnostic systems for track and control of parameters. Development, manufacturing and after-sales are all fields that use diagnostic systems' help to execute their tasks. Applying communication protocols such as KWP2000, SAEJ1939/73 and UDS makes diagnostic device and automotive network communicate to each other according to standards. This work aims to present an overview about a few communication protocols for diagnostic and services, by showing their specific tools and applications.

Safety critical systems are taking demands on automotive systems where the distributed embedded system needs a communication system with properties of fault tolerant real-time communication. In order to increase reliability of systems with serial communication, a device called bus guardian can be added on physical layer to perform management of schedules and data independently from the communication controller, monitoring timing and sending signals of bus status notifying error occurrences to the host. The goal of this paper is to present and perform a comparative analysis of different strategies of bus guardian used in CAN, TTP/C and Flexray protocols, applied in safety critical system in automobile domain. A comparison was carried out to describe the properties and application for each protocol.

The automotive system domain are in increasing motivation with benefits by using the x-by-wire technologies, which employ new electronic devices to provide for automobile system more facilities during processes at development, production, usability and maintenance. Considering at automobile user domain point of view, the next generation of automobiles can give users more comfort, safety and flexibility. However, for the safety critical applications at automobiles have as requirements the use of distributed embedded systems and fault tolerance methodologies where in communication infrastructure need to offer fault-tolerance communication services. Several researches regards fault tolerance communication systems for automotive domain are now in progress and a strong convergence in use of the Flexray technology is noted for the automotive community. The Flexray is one of the communication systems that had been proposed and available at AUTOSAR standard.

Distributed Control Systems (DCS) are becoming widely used in several areas of application, including automotive embedded systems. Many of these applications have severe timing constraints and are considered safety-critical, requiring predictable behavior in relation to both logical result and timing even in presence of faults. In such cases, a graceful degradation of service delivery that fulfils safety requirements can be tolerated. Especially in the automotive area, which is considering the possibility of replacing the major part of mechanical and/or hydraulic systems for electronic systems, the importance of reliable communication services plays a key role. To cover automotive DCS requirements, it is necessary to explore fault-tolerant techniques. In this context, this work presents an analysis on communication requirements in the automotive embedded system domain. In addition, a simulated analysis comparing a CAN and a TTP/C DCS is presented.