Multiple Fault Gas Path Analysis Applied to a Twin Spool,Mixed Flow,Variable Geometry,Turbofan Engine.

摘要

This report presents the results of a study made to develop a multiple fault diagnostic system for a complex twin spool, mixed flow, variable geometry turbofan engine using Hamilton Standard's Gas Path Analysis Technique. Engine data from a detailed nonlinear simulation of a paper engine was used. A simple control mode is also presented. Using a weighted least squared estimation procedure, a number of possible diagnostic routines are developed taking into account sensor and control uncertainties. A figure of merit is defined and used to isolate the acceptable diagnostic systems.