Accession Number : ADA019183

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

Descriptive Note : Final rept.,

Corporate Author : UNITED TECHNOLOGIES CORP WINDSOR LOCKS CONN HAMILTON STANDARD DIV

Personal Author(s) : Kos,Joseph M.

Report Date : OCT 1975

Pagination or Media Count : 108

Abstract : 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.

Descriptors :   *Turbofan engines, *Diagnosis(General), Computer applications, Maintenance, Gas turbines, Matrices(Mathematics), Least squares method, Nonlinear systems

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE