Modeling of degradation process of reciprocating seal based on Gaussian Copula function

Reciprocating seal is an important part of hydraulic equipment and is widely used in the actuator of the aircraft. Performance degradation analysis of them is becoming very important. At present, the researches on the performance degradation analysis of reciprocating seals at home and abroad are mainly focused on the theoretical research of sealing mechanism and experimental research on sealing performance As the study of performance degradation based on the degradation data of reciprocating seals and the establishment of an effective performance degradation model can accurately describe the reliability of the reciprocating seal during its use. In this paper, Gaussian Copula function is used to establish the binary random correlation degradation model of the friction and leakage of the sealing surface of the reciprocating seal, and a Bayeslan method is used to estimate the parameters. The proposed model is verified by performance degradation data of a certain type of reciprocating seal, and the results show that this model is accurate and effective.