基于贝叶斯网络的发动机推力振荡故障诊断研究

Research on engine thrust oscillation fault diagnosis based on Bayesian network

燃油计量振荡是发动机推力震荡的主要原因之一。针对燃油计量振荡故障原因多、难以诊断的问题,首先建立燃油计量振荡故障树;然后通过研究故障树与贝叶斯网络的转换方法,建立发动机燃油计量振荡的贝叶斯网络模型;最后构建了基于贝叶斯网络的燃油计量振荡故障诊断模型,并通过案例分析验证了该模型的有效性,为发动机故障诊断提供技术支持。

Fuel metering oscillation is one of the main causes of thrust oscillation in engine.This paper establishes a fuel metering oscillation fault tree to solve the problem of many causes and difficult diagnosis.Then it establishes the Bayesian network model of engine fuel metering oscillation by studying the conversion method between fault tree and Bayesian network.Finally,it constructs a Bayesian network-based fault diagnosis model for fuel metering oscillation,and verifies the effectiveness of the model through case analysis,which provides technical support for engine fault diagnosis.