EQUIPMENT HEALTH MONITORING METHOD AND SYSTEM AND ENGINE

摘要

An Equipment Health Monitoring method for an engine and an Equipment Health Monitoring system for performing the method are provided. At least some of the following units are used: an Engine Simulation Unit, a Possibilistic Drift Computation Unit, a Fuzzy String Generator Unit, an Experience-based String Matching Unit and an Information Fusion and Prognosis Unit.

主权项

1. An Equipment Health Monitoring method for an engine with the following steps
a) a possibilistic drift computation unit automatically allots an upper probability distribution to drift rates of the differences between measured and predicted values generated by an engine simulation unit, b) a fuzzy string generator unit transforms the numerical sequence of upper probabilities of the drift rates generated by the possibilistic drift computation unit into a sequence of quantified terms in a fuzzy term set, c) an experience-based string matching unit compares the string of terms generated by the fuzzy string generator unit with at least one other sequence or portion of sequence of previously obtained fuzzy terms in order to determine the degree of similarity to each of the database set, and d) an information fusion and prognosis unit determining in dependence of the matching patterns or portions of the patterns resulting from the comparisons carried out in the experience-based string matching unit, providing a rate of engine deterioration indicating the current level of deterioration, the rate of deterioration change and the remaining useful life for a given level of deterioration or requirement or otherwise for engine maintenance or the most likely level of deterioration and the likelihood for the requirement or otherwise of engine maintenance of the engine under test.