基于模型的离心泵故障诊断设计

Troubleshooting Centrifugal Model-Based Design

针对离心泵这一工业技术过程中的基本设备,开展基于解析模型的故障诊断方法设计研究。首先在对离心泵工作机理进行详细分析的基础上,建立离心泵管道系统的传递函数模型,然后考虑电动机定子绕组发生匝间短路,建立其在故障情况下的模型。接着,基于所构建的模型,采用因式分解方法设计残差产生器以实时检测匝间短路故障。最后,通过Matlab/Simulink仿真验证了所提方法的有效性和优越性。

The model-based fault diagnosis method is developed for centrifugal pump which is one of the most popular equipment in industrial technology process. Firstly, on the basis of a detailed analysis of working mechanism of centrifugal pump, the transfer function model of centrifugal pump and pipe system is established. Then a faulty model is built while a stator winding inter-turn short circuit occurs in motor. Based on this, a factorization method is employed to design a residual generator to detect the fault in real time. Finally, a numerical example is used to demonstrate the effectiveness and superiority of the proposed method.