F - Mech Eng,Light,Heat,Weapons – 02 – C
Patent
F - Mech Eng,Light,Heat,Weapons
02
C
341/112
F02C 9/00 (2006.01) F02C 9/46 (2006.01) G05B 9/02 (2006.01) G05B 15/02 (2006.01)
Patent
CA 1188775
METHOD AND APPARATUS FOR FAILURE DETECTION AND CORRECTION IN GAS TURBINE ENGINE CONTROL SYSTEM Abstract of the Disclosure In a system for controlling the performance of a gas turbine engine, a small digital computer is placed between the output from the sensors which measure the value of the various engine parameters used for control and the computational unit which computes the values of output signals to actuators which maintain values for controlled engine parameters such as engine fuel flow and geometry. The digital computer includes a stored program which models the engine being controlled and which is continually updated by the output from the control parameter sensors and by signals indicating the value of controlled parameters. The control parameters input to the computational unit are continuously generated by the computer and represent the model's estimate of the actual value of the control parameter sensor signals input to the computer. The computer continuously compares received control parameter sensor inputs with the corresponding input generated by the engine model and in the event a difference exceeding stored and calculated tolerances is detected, that sensor is inhibited from updating the engine model. The computer continues to estimate values for control parameters for the inhibited sensor inputs using the stored model updated by the remaining uninhibited control parameter sensor signals and by the signal indicating the value of the controlled parameters. An indication of an interrupted control parameter sensor signal may be provided to the engine operator. The system permits continued operation of the engine control even though one or more control parameter sensor inputs are lost. When used with a digital engine control, the system may be integrated into the control without the need of separate computer components.
292813
Spang Henry A. III
Wanger Robert P.
Company General Electric
Eckersley Raymond A.
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