FlexRay 為汽車控制系統的通訊網路協定,用來讓電子控制單元在系統運作時具有更高的安全性與舒適性,以滿足日益增長的需求。車用電子控制單元比其他系統需要更高的可靠度,也使得這些系統必須加入容錯技術來達到高可靠度的要求。 本研究針對車輛的主動安全部分,以車輛模擬軟體CarSim整合LabVIEW與相關介面卡,做為模擬測試車輛,並以此研發出具備容錯功能的嵌入式防鎖死煞車系統之容錯FlexRay ECU節點。此節點透過FlexRay的高速通訊,可立即將ABS剎車的狀態與資料數據,傳送至FlexRay網路。 此外,在節點中,採用任務搬移 ( Task Migration ) 概念並加以改良,並由容錯FlexRay ABS ECU以及容錯協同周邊控制處理器組成。其中,容錯FlexRay ABS ECU負責ABS的輪速與滑差速的計算以及實現FlexRay通訊。而容錯協同周邊控制處理器負責控制ABS周邊的輸入與輸出控制。 此容錯節點透過連接NI PXI平台與CarSim軟體來驗證FlexRay車載通訊網路完全符合容錯機制的需求。未來,更可將相關成果整合至需高安全性要求的車用主動安全系統中。
FlexRay, as a communication protocol for automotive control systems, is developed to fulfill the increasing demand on the electronic control units for implementing systems with higher safety and more comfort. There is an ultimate need that the automotive electronic control units must possess higher reliability compared with the other systems. This study design the fault-tolerant of FlexRay ECU using improved task migration concept. The node is assemble by the fault-tolerant of FlexRay ECU and the coordinator. The responsibility of fault-tolerant of FlexRay ECU are FlexRay communication. The responsibility of coordinator are the control of peripheral. Construct a FlexRay automotive communication network, and then complete the design of a fault-tolerant mechanisms X-by-wire control system. Finally, fault-tolerant FlexRay ECU nodes connected NI PXI platform and CarSim software verification FlexRay automotive communication networks.