Research On The Way Of Diagnosis And Forecast For The Fault Of Axial Plunger Pump And System Development

This dissertation researched the methods of fault intelligent diagnosing and forecasting of axial plunger pump, and developed its computer aided fault diagnosing and forecasting system.This dissertation analyzed the fault happening mechanism of axial plunger pump, confirmed the parameters and their collecting methods that will be used in the malfunction diagnosing and forecasting process.The causation of fault can be found out through its symptom and source by using the fuzzy diagnosing. Thus realize the intelligent diagnosing of axial plunger pump. The fault diagnosing process is as follows: first, quantify the value of symptom and source of fault, then confirm the correspondences between the symptom and fault causation, the source and fault causation, and how tightly they correspond. Last, figure out the serious value of each fault causation by fuzzy fault diagnosing model. The causation with largest serious value is most likely the fault causation. Get the error of serious value between the practical test and diagnosis. Then correct the fuzzy fault diagnosis model by least square method.Using grey forecasting method, the fault trend of the axial plunger pump can be forecasted. First, we should collect five groups of data, which are measured in the equal interval, then figure out the values of fault symptom and source in the next interval. Last, according the fault diagnosing method put forward in this dissertation, we can forecast how serious the fault will be in the next interval.At last, this dissertation introduced the developing idea and principle of the system, analyzed the requirement, designed the database, introduced the function of main modules, and designed the interface of the system.