In order to improve the life prediction precision of the metallized membrane capacitor and ensure the safe and stable operation of the pulse power system

a new method of predicting the lifetime of capacitor based on particle filter algorithm is proposed. The method does not require a large number of life data

and can continuously update the model parameters through historical data

and accurately predict the life of a single capacitor. The life degradation experiments of 54 metallized membrane capacitors under 3 operating conditions can be obtained. Compared with the traditional Weibull distribution model method and the Birnbaum-Saunders distribution model method

the proposed method has higher prediction accuracy

the average prediction deviation under the 3 operating conditions is lower than 100 times

and the effectiveness of the proposed method is verified.