- 學位論文
基於仿真設計平台開發高度安全性系統之安全流程
Development of Safety Process in Model-Based Design Platform for Safety-Critical System
摘要
隨著分散式線傳控制系統逐漸成為汽車電子系統中的主流，在開發高度安全性相關的汽車電子系統的過程中，系統的安全性與強韌度的問題必須得到解決。這是分散式線傳控制系統主要面臨的問題與挑戰。因此，應該提出有效的安全設計和驗證方法，以幫助降低複雜的設計與驗證過程。本論文針對高安全性系統如何導入國際功能安全規範ISO 26262安全設計與驗證程序，提出在模型化基礎設計平台中有效率的系統化安全驗證與風險降低流程。以個案研究的方式，利用National Instruments PXI 與dSPACE建立系統設計與驗證平台並且開發一套煞車系統。故障注入基於模型的實驗結果表明，透過錯誤注入模擬各個元件故障，來分析元件失效對於系統的嚴重程度和系統的強韌度，然後，採用容錯機制以保護最脆弱的部件，提高了系統的安全性/強韌度，探討容錯機制對於系統整體強韌度/安全性的影響。
並列摘要
Using international standards, such as ISO 26262, to verity system functional safety the reliability and robustness of a system can be ensured. This can effectively decrease development cost and time while increasing system robustness. This research proposes a safety validation and risk reduction (SVRR) process based on ISO 26262 verification standards for decreasing risk and safety verification. It can be used to recognize the key components in the system, and then according to the severity of the failure mode in the system the effects of faults can be effectively decreased though fault-tolerant mechanism protection. This research uses NI and dSPACE system to build a safety verification platform. Developing the emergency brake control algorithm and brake-by-wire system can be used to verify the core concept of SVRR. Experimental results prove the robustness of the component and the safety of the system to verify the main components to be careful of. Then using fault tolerant mechanism the failure probability of key components can be effectively decreased.
參考文獻
延伸閱讀
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