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本文讨论了故障注入研究中的一些基本问题，为故障注入的研究建立了统一的理论框架．文章引入容错系统层次结构来描述故障注入的概念，将故障注入定义为一个试验过程．故障注入的原理被解释为组成该试验过程的四个步骤．故障注入的应用不仅包括评价容错机制，而且还可应用于更为广泛的领域．
This paper discusses some basic problems in fault injection research and establishes a unified theoretical framework for fault injection research. The article introduces fault-tolerant system hierarchy to describe the concept of fault injection, and fault injection is defined as a trial process. The principle of fault injection is explained as the four steps that make up the test. Application of fault injection not only includes the evaluation of fault tolerance mechanism, but also can be applied to a wider area.