飞机电液伺服阀早期故障征兆诊断

电液伺服阀是飞机刹车系统的重要执行部件,影响着飞机的着陆安全。针对某型飞机电液伺服阀故 障多发的问题,运用一元线性回归分析方法构建刹车系统电液伺服阀的分析模型,根据分析模型和故障征兆判 据对电液伺服阀近期的工作数据进行分析和故障征兆诊断。结果表明:基于回归分析的故障诊断方法可以准 确地诊断电液伺服阀存在的故障征兆;早期故障征兆诊断可以预先发现电液伺服阀潜在的故障隐患,降低故障 发生率,显著提高飞机刹车系统的安全性和可靠性,也有助于优化维修策略和降低飞机全寿命维护成本。

Early Fault Symptom Diagnosis of Electro-hydraulic Servo Valve of Aircraft Brake System Based on Regression Analysis

Electro-hydraulic servo valve is an important part of aircraft brake system, which affects the safety of aircraft landing . In order to solve the problem of frequent failure of a certain type of electro-hydraulic servo valve, a model of electro-hydraulic servo valve of the brake system is established by using the regression analysis method. According to the analysis model and the fault symptom criterion, the recent working data of the electro-hydraulic servo valve are analyzed and the fault symptom is diagnosed. The results show that the method can accurately diagnose the fault symptoms of the electro-hydraulic servo valve.The early fault symptom diagnosis can detect the potential fault of the electro-hydraulic servo valve in advance, reduce the fault rate, improve the safety and reliability of the aircraft brake system significantly, and also help to optimize the maintenance strategy and reduce life cycle maintenance costs of the aircraft.