1553B Fault Injection Method Using Modify-Playback Principle
Abstract in Chinese:
During the testing process of fault injection at the system level of an aircraft using the 1553B bus, common engineering issues are often encountered, such as difficulties in ensuring the real-time transmission of signals during the 1553B injection process, challenges in obtaining or frequently changing bus interface protocols, and onboard software that struggles to adapt and modify in real-time for fault testing. Currently, common fault injection methods based on signal forwarding and signal pass-through do not adequately meet these needs. In response to this situation, and based on an engineering applicability analysis of existing methods, a new fault injection method using the modify-playback principle for 1553B has been proposed. This method has been compared with existing methods, highlighting its advantages and disadvantages, and concludes that the modify-playback principle for 1553B fault injection can effectively address the aforementioned engineering issues and is feasible.
Abstract in English:
There are several problems in general 1553B fault-injection methods from an engineering perspective. For example, the real-time signal transmission is difficult to guarantee if the fault is injected during transmission, the interface protocol is difficult to obtain or changes frequently, and the onboard software can barely be changed to adapt to the fault-injection experiment, and so on. Three fault injection methods of 1553B, along with the principles and application methods, were presented, comprising two existing fault injection methods based on signal transmission and signal reaching-through, and a new method based on modifications-playback. The advantages and disadvantages of the three methods were analyzed and compared in the end.
