An examination of the variables affecting a fuel control unit's metering performance

Abstract

One of the most crucial parts of an aircraft engine's fuel system, the fuel regulator has a big influence on flight safety. Techniques for fault diagnosis have been demonstrated to be effective in enhancing and ensuring the dependability of important units. In this study, a method for fuel regulator defect diagnostics in aviation engines is devised. A fuel regulator model is used in the fault diagnosis strategy to predict fuel flow in response to engine controller commands, an engine inverse model is constructed to precisely estimate the amount of fuel flowing through the regulator, and deviations between the outputs of the regulator model, engine inverse model, and feedback sensor measurement are used to detect and isolate regulator faults.