A fault-tolerant method for flight control system based on new network distributed architecture

The flight control system is a critical component of aircraft,responsible for core functions such as attitude stabilization,trajectory control,and fault disposal. However,centralized flight control systems are constrained by computational resources and communication capabilities,making it difficult to meet the demands for high integration and intelligence in modern flight control systems. Meanwhile,distributed flight control systems suffer from single-point faults in bus control nodes. To address these issues,a highly fault-tolerant distributed flight control system architecture based on Time-Triggered Ethernet(TTE) networks is proposed,and fault diagnosis and fault tolerance within this framework are investigated. A task scheduling model for the distributed system is modeled using a Directed Acyclic Graph(DAG),enabling the onboard computer cluster to perform fault-tolerant scheduling of complex flight control and management tasks. Furthermore,a distributed semi-physical verification environment based on network protocols is constructed to validate the fault-tolerant operation of the networked distributed system architecture. Results demonstrate that the proposed networked distributed architecture and its system fault-tolerant operation algorithms enhance fault-tolerant capabilities while adapting to future information exchange demands of advanced flight control systems, achieving fault-tolerant operation with information-level fault tolerance as the foundation and function-level fault tolerance as the core,achieving fault-tolerant operation with information-level fault tolerance as the foundation and function-level fault tolerance as the core.