Reliability Evaluation of Fuel Servo-valve With Random Initial Degradation Values

Abstract

*The fuel servo-valve is a critical component of servo control system. So its reliability greatly affects the reliability of the entire engine system. So how to estimate the storage reliability of fuel servo-valve using degradation data is an urgent problem to be solved. Noticed that the initial value of the degradation data with high dispersity is not 0. We first establish the Wiener process model with random initial value. This initial value obeys normal distribution. Next, we estimate the model parameters by means of MLE (maximum likelihood estimation). In the end, storage reliability estimation was done in the light of certain batch of fuel servo-valve.