针对嵌入式系统的特点,提出一种策略驱动的可靠嵌入式系统建模与分析方法.基于Petri网建立嵌入式系统的形式化描述语言,并对设备、计算与物理交互、组件及通信过程等要素进行建模.分析嵌入式系统的主要故障类型和特征,探索嵌入式系统的可靠性保障策略.采用面向方面思想提取可靠性保障策略相关关注点.通过构造关注点模型,并利用编织机制,将关注点模型动态地集成为一个完整的嵌入式系统可靠模型.利用Petri网相关理论分析嵌入式系统可靠性保障策略的有效性.具体实例表明,该方法能够简化嵌入式系统的设计与分析过程,有效地提高嵌入式系统的设计质量.%This paper proposes a strategy driven approach to modeling and analyzing reliable embedded systems according to their characteristics. Petri nets are used as the formal description language for embedded systems,which formally specify embedded system's elements such as equipment, computing, physical interaction,components, and communication processes. This research studies reliability assurance strategies for embedded systems by analyzing various fault types and their characteristics. An aspect-oriented method is used to extract reliability related concerns. A complete embedded system model is obtained by constructing reliability aspect models and then applying the weaving mechanism to dynamically combining components and aspects. The effectiveness of reliability assurance strategies is analyzed based on the theories of Petri nets. A case study demonstrates that the approach can simplify design and modeling processes of embedded systems and contribute to improving its quality.
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