Multi-mode adaptive fail-fixed system for FADEC controlled gas turbine engines
First Claim
1. A gas turbine engine control system comprising:
- an automatic control operable to control a gas turbine engine; and
a module configured to fail-fix the gas turbine engine to one of a multiple of pre-determined modes in response to failure of said automatic control, said multiple of pre-determined modes each different than said automatic control operative to control said gas turbine engine,wherein said multiple of pre-determined modes includes a low fuel flow power mode, a moderate fuel flow power mode and a high fuel flow power mode,wherein said automatic control includes a Full Authority Digital Engine Control (FADEC), and said module is remote from said FADEC.
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Accused Products
Abstract
A gas turbine engine control system according to an exemplary aspect of the present disclosure includes, among other things, an automatic control operable to control a gas turbine engine. The gas turbine engine control system further comprises a module operable to fail-fix the gas turbine engine to one of a multiple of pre-determined modes in response to failure of the automatic control. The exemplary gas turbine engine control system may further comprise a fuel flow meter to sense a fuel flow to the engine, a fuel control to control the fuel flow to the engine, and the module in electrical communication with the fuel flow meter to fix the fuel control in response to one of the multiple of pre-determined modes.
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Citations
17 Claims
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1. A gas turbine engine control system comprising:
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an automatic control operable to control a gas turbine engine; and a module configured to fail-fix the gas turbine engine to one of a multiple of pre-determined modes in response to failure of said automatic control, said multiple of pre-determined modes each different than said automatic control operative to control said gas turbine engine, wherein said multiple of pre-determined modes includes a low fuel flow power mode, a moderate fuel flow power mode and a high fuel flow power mode, wherein said automatic control includes a Full Authority Digital Engine Control (FADEC), and said module is remote from said FADEC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for transfer to a backup system in response to automatic engine control failure comprising:
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identification of a loss of a Full Authority Digital Electronic Control (FADEC) for automatic engine control; selecting one of a multiple of preprogrammed backup modes after the identification using a module operating independently from the FADEC, the multiple of pre-determined modes including a low fuel flow power mode, a moderate fuel flow power mode and a high fuel flow power mode; and operating a gas turbine engine in response to the selected preprogrammed backup mode. - View Dependent Claims (14, 15, 16, 17)
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Specification