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A Methodology and Tool Support for the Design and Evaluation of Fault Tolerant, Distributed Embedded Systems.

机译：用于容错分布式嵌入式系统的设计和评估的方法和工具支持。

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摘要

Embedded systems are becoming pervasive in diverse application domains, such as automotive, avionic, medical, and industrial automation control systems. Advancements in technology and the demand for sophisticated functionality to support a variety of applications are driving the increase in complexity of embedded systems, particularly in systems whose incorrect operation can result in significant consequences, such as financial loss or human life. As a result, these systems require high assurance to meet stringent constraints on reliability and fault tolerance, the ability to operate despite potential for components to operate incorrectly.;Reliability is an important design goal in distributed embedded systems that may be achieved by the provision of additional components in parallel or by improving component reliability. Thus, reliability in a fault tolerant system will be dictated by the combinations of components that operate incorrectly, or fail. Since, redundancy comes at a cost, the problem that designers face is determining which components to improve. Most existing approaches that seek to achieve better system reliability by determining levels of component redundancies and a selection of component reliabilities simultaneously do not consider the design of embedded systems. Of the approaches that do consider applications in the design of embedded systems, many do not consider the combinations of component failures, their location in the system architecture, and rate of failure due to the challenges and limitations of constructing reliability models that can express those characteristics.;In this dissertation, I present a design flow and a set of tools to support the design and analysis of distributed embedded systems with fault tolerant and reliability requirements using fault trees. A fault tree is a reliability model that is based on the failure characteristics of a system and its structure. The proposed design flow integrates the automatic generation and analysis of fault trees to enable the design of fault tolerant architectures. I will apply this design flow to the evaluation of a fault tolerant control application and to the evaluation of architecture alternatives for an automotive application.
机译：嵌入式系统正在汽车，航空，医疗和工业自动化控制系统等各种应用领域中普及。技术的进步以及对支持各种应用程序的复杂功能的需求正在推动嵌入式系统的复杂性增加，特别是在不正确操作会导致重大后果（例如财务损失或生命危险）的系统中。结果，这些系统需要严格的保证，才能满足对可靠性和容错性的严格约束，尽管组件可能无法正确运行，但仍具有运行能力。可靠性是分布式嵌入式系统中的重要设计目标，可以通过提供并行增加其他组件或通过提高组件可靠性。因此，容错系统中的可靠性将由操作不正确或发生故障的组件的组合决定。由于冗余是有代价的，因此设计人员面临的问题是确定要改进的组件。通过确定组件冗余级别和同时选择组件可靠性来寻求获得更好的系统可靠性的大多数现有方法都没有考虑嵌入式系统的设计。在确实考虑嵌入式系统设计中的应用程序的方法中，由于构建可表示这些特性的可靠性模型的挑战和局限性，许多方法并未考虑组件故障的组合，它们在系统架构中的位置以及故障率在本文中，我提出了一个设计流程和一套工具，以支持使用故障树对具有容错性和可靠性要求的分布式嵌入式系统进行设计和分析。故障树是一种可靠性模型，它基于系统的故障特征及其结构。提出的设计流程集成了故障树的自动生成和分析功能，以实现容错体系结构的设计。我将将此设计流程应用于容错控制应用程序的评估以及汽车应用程序的体系结构替代方案的评估。

著录项

  • 作者

    McKelvin, Mark Lee, Jr.;

  • 作者单位

    University of California, Berkeley.;

  • 授予单位 University of California, Berkeley.;
  • 学科 Engineering Electronics and Electrical.;Engineering System Science.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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