A Fault Diagnosis Method for Flight Control System

Abstract

The invention relates to a flight control system fault diagnosis method and belongs to the fault diagnosis technology field of a flight control system. The method comprises steps that 1), components and a connection structure of the flight control system are determined; 2), a distributed flight control computer structure and redundancy configuration are determined; 3), an aircraft object model is determined; 4), a performing mechanism and model fault observers of an airborne sensing system are designed according to the object model determined in the step 3), and typical faults are identified; 5), according to the distributed flight control computer structure, the corresponding model fault observer is configured in each distributed unit; 6), fault diagnosis of the flight control system is carried out according to hardware redundancy and the model fault observers; and 7), the fault diagnosis effect of the system is tested, and the system structure is further optimized. The method is advantaged in that fault diagnosis of the flight control computer, the airborne sensing system and the performing mechanism in the flight control system can be realized.

Description

technical field [0001] The invention relates to a fault diagnosis method of a flight control system, belonging to the technical field of fault diagnosis of a flight control system. Background technique [0002] The reliability and safety of the flight control system has always been an important research direction for aviation vehicles. The flight control system includes flight control computers, actuators and onboard sensor systems. Among them, the job responsibility of the flight control computer is to complete the flight control task of the UAV, manage and dispatch the airborne equipment, realize resource sharing and data information fusion, and is the connection hub between the air and ground command systems. At present, the increase in the number and complexity of UAV tasks, the fusion of multiple sensor data, and the increase in flight range and performance boundaries have put forward higher requirements for the reliability and safety of flight control computers. [00...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defect of insufficient fault diagnosis coverage, the present invention proposes a fault diagnosis method for the flight control system, which can effectively diagnose the faults of the flight control computer, actuators and sensors in the flight control system, and solve the problem that the traditional single fault observer cannot Insufficient diagnosis of computer internal faults improves the fault diagnosis coverage and reliability of the flight control system

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