Remaining useful life prediction for piston pump based on HP filter and Wiener process
The performance degradation of the piston pump is mainly caused by the increasing leakage of some key friction pairs.The leakage flow of the key friction pairs was analyzed theoretically,and the total leakage flow of the piston pump was established by introducing the degradation rate parameters of the equivalent clearance and the working condition factors.In the case of considering the measurement error,the HP(Hodrick-Prescott)filtering method was used to filter out the random noise.The degradation model of the piston pump was developed using Wiener process by calculating the total leakage flow of the piston pump after filtering noise.Based on the developed model,the remaining useful life was established.The degradation model analysis results showed the failure probability of the piston pump using HP filter was less than 1％,whereas it was 28％using raw data when the piston pump ran 900 h.Therefore,the degradation model using HP filter is more suitable for the piston pump.
axial piston pumpHP filter decompositionWiener processperformance degradationremaining useful life prediction
NETL
NSTL
万方数据
