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A Strategy to Formalize Specification and Its Application to an Advanced Railway System

机译:规范规范化策略及其在先进铁路系统中的应用

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摘要

This paper proposes a novel strategy for formally analyzing functional requirements specification (FRS) and applies it to the Automatic Train Protection and Block (ATPB) system, which is proposed to reconstruct conventional rail lines in Japan. Based on the FRS in natural language, firstly, dynamic state transitions are extracted to express the operational mechanisms and determine the system parameters. A complete model of the ATPB system is then established using Unified Modeling Language (UML) to express the system structure graphically and explicitly. After achieving a common understanding, a VDM++ model is established formally to redescribe the original FRS of the ATPB system which is written in natural language (i.e. Japanese). Following that, in order to ensure internal consistency of the specification, proof obligations of the VDM++ model are discharged. Furthermore, a comprehensive testing is implemented to ensure that the FRS meets actual requirements. Finally, the system is simulated strictly in accordance with the formal specification. Without any runtime errors, collisions or derailments, the results of the simulation demonstrate the high quality and safety of the specification.
机译:本文提出了一种正式分析功能需求规范(FRS)的新策略,并将其应用于自动列车保护和阻止(ATPB)系统,该系统被提议用于重建日本的常规铁路线。首先,基于自然语言的FRS,提取动态状态转换以表达操作机制并确定系统参数。然后,使用统一建模语言(UML)建立ATPB系统的完整模型,以图形方式明确地表示系统结构。在达成共识之后,正式建立了VDM ++模型,以重新描述以自然语言(即日语)编写的ATPB系统的原始FRS。此后,为了确保规范的内部一致性,VDM ++模型的证明义务得以履行。此外,还进行了全面的测试以确保FRS满足实际要求。最后,严格按照正式规范对系统进行仿真。模拟结果没有任何运行时错误,碰撞或脱轨,证明了该规范的高质量和安全性。

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