基于空时模型的航空管路卡箍故障诊断研究

Research on Fault Diagnosis for Aero-Pipeline Clamp Based on Space-Time Model

针对航空液压管路卡箍振动信号受强噪声干扰,导致航空卡箍故障难以精准识别的问题,提出一种空时模型的航空卡箍故障诊断新方法。建立空间特征提取模型,对航空卡箍的故障特征进行局部融合。在空间模型中引入GRU模块,提取航空卡箍故障信号中的全局特征。结果表明:设计的空时故障诊断模型可实现航空卡箍故障的精准识别。与目前所用的深度卷积神经网络模型、门控循环单元神经网络模型、循环神经网络模型、支持向量机和误差反向传播神经网络模型等5种先进的故障诊断方法进行对比分析,所提方法对航空卡箍故障识别具有优越性。

Aiming at the problem that the vibration signal of aviation hydraulic pipe clamp is interfered by strong noise,it is difficult to accurately identify aviation clamp fault,a new method of aviation clamp fault diagnosis based on space time model was proposed.A spatial feature extraction model was established to carry out local fusion of fault features of aviation clamp.The GRU module was introduced into the spatial model to extract the global features of the aviation clamp fault signal.The results show that:the designed space-time fault diagnosis model can be used to realize accurate identification of aviation clamp faults.It was compared with five advanced fault diagnosis methods currently used,including deep convolutional neural network model,gated recurrent unit neural network model,recurrent neural network model,support vector machine and error back propagation neural network model.The proposed method has advantages in fault identification of aviation clamp.