Estimations of Reliability Parameters on One Type of Missile by Introducing Failure Information

By introducing failure information, an aggressive problem of directly using zero-failure datas to estimate the reliability and parameters of the equipment is solved. For one type of missile rolling bearing which is in accord with Weibull distribution, the paper proves the expected Bayesian estimation of the failure probability with zero-failure data. A modified method is carried out to determine the time of timing truncation test. With the failure information, it derives the weighted comprehensive estimation method of failure probability. On the other hand, it provides the weighted least square estimation method of the parameters in Weibull distribution. Based on the datas of the rolling bearing, it gives the weighted comprehensive estimations of the parameters and reliability. The difference with shape parameter is reduced by 9.85% and the difference with reliability is reduced by 33.3%. The results indicates that the modified method could be more reasonable and practical.