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随着1553B总线在航空航天领域的广泛应用,对其可靠性、测试性的要求日益迫切。而一般的1553B总线测试均是在传统方法上的正向测试,即针对输入的激励测试输出的响应,因此无法覆盖到更多在异常状态下的测试环境。为了增大测试覆盖性,本文将故障注入思想引入到1553B总线测试中,分别对总线物理层、电气层和协议层中典型的测试用例进行故障注入的故障模式和实现方法研究,实验的结果验证了故障注入测试方法可以实现预期的故障目标。
As the 1553B bus is widely used in the aerospace field, its reliability and testing requirements are increasingly pressing. While the typical 1553B bus test is a positive test on a conventional method, that is, a response to an input stimulus test output, it is impossible to cover more test environments in an abnormal state. In order to increase test coverage, this paper introduces the idea of fault injection into the 1553B bus test, and studies the fault modes and implementation methods of fault injection of typical test cases in the physical layer, electrical layer and protocol layer of the bus. The experimental results verify The fault injection test method can achieve the expected fault target.