Fuel control system with fuel metering valve fault accommodation

An apparatus is disclosed for a fuel control system of a turbine engine powerplant. Various construction details have been developed which provide means to generate a backup command current for controlling the fuel flow rate to the turbine engine powerplant. In one embodiment, a means to generate a...

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Bibliographische Detailangaben
Hauptverfasser:	SCHRYVER, MATTHEW J, MEISNER, RICHARD
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	An apparatus is disclosed for a fuel control system of a turbine engine powerplant. Various construction details have been developed which provide means to generate a backup command current for controlling the fuel flow rate to the turbine engine powerplant. In one embodiment, a means to generate a backup command current includes means to convert a fuel flow derivative to a backup command current using known hardware characteristics and an estimated null bias signal. The backup command current is input to a switch along with a command current generated by comparing a reference signal to a feedback signal from a metering valve. The switch responds to means for failure recognition which detects failures in the sensing of the feedback signal. The switch responds to a failure of the feedback signal by inputting the backup command current to a torque motor for controlling a metering valve position.