Research Status and Challenges on Fault Diagnosis Methodology for Fuel Control System of Aero-engine
As engine performance requirements continue to improve,the operating conditions of the fuel control system have become harsher and the boundary conditions have become more complex.There are various causes of fatal failures in fuel control systems,including inherent pressure pulsation of the fuel pump and fluid-solid coupling vibration of pipelines and valves,leakage caused by corrosion or aging of sealing rings,increased wear due to oil contamination or lubricating oil failure,etc.At the same time,the fuel control system has the characteristics of few measuring points,variable operating conditions,strong interference,and strong nonlinearity.Therefore,there is an urgent need for fault diagnosis technology in this field while facing huge challenges.In order to promote the development of fault diagnosis technology in the field of fuel control systems,this study reviews the main methods and classifications of fault diagnosis technology after summarizing the characteristics and common faults of the fuel control system.Furthermore,from the perspective of hydraulic component interchangeability,the current research status of key components of fuel control systems is summarized based on physical models,signal processing and artificial intelligence diagnostic methods.Finally,the challenges and opportunities existing in fuel control system fault diagnosis technology are pointed out.
fuel control systemfault diagnosisphysical modelsignal processingartificial intelligence
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NSTL
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