Design and Implementation of a Heterogeneous Safety Critical Computer

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In recent years, the rapid development of high-speed railway in our country, followed by a rail safety problem has become the most important issue, as the core of the train operation control equipment, the development of the safety critical computer should be considered, firstly. At present, the mainstream safety critical computers all adopt the method of isomorphism, which can eliminate the multiple non-common fault of the same error structure, but can do nothing for some common fault. In this paper, a heterogeneous safety critical computer design and implementation method is proposed, which adopts the method of heterogeneous hardware and software, and analyzes its reliability and security by using fault tree model.