涡扇发动机故障诊断的快速原型设计

提出一种基于发动机基线模型的面向气路故障诊断的快速原型设计方法.考虑到基于模型的发动机全包线范围的故障诊断方法需要有较高精度的模型,选择合适的换算参数对已有的相似变换参数进行修正,建立适用于全包线的发动机基线模型,设计基于加权最小二乘算法的故障诊断模型,并将其写入至CompactRIO构建了发动机故障诊断的快速原型.通过对某型涡扇发动机试验表明:该种故障诊断的快速原型设计方法是有效的.

Rapid prototype design for turbo-fan engine fault diagnosis

In order to meet the requirements of turbo-fan engine fault diagnosis,a kind of rapid prototype simulation design way based on the baseline of the engine for gas-path fault diagnosis was proposed.Considering the precision of the fault diagnosis in the flight envelope influenced by the engine baseline,optimal transformation index was selected in simulation transformation for the setup of baseline.The weighted least-squares algorithm was used to design the fault diagnosis model,which was downloaded to National Instrument (NI) CompactRIO to form rapid prototype simulation system.A series of test experiments on a turbo-fan engine show the effectiveness of this rapid prototype design method for gas-path fault diagnosis.