Fault Tolerant Multivariable Control of a Military Turbofan Engine
| Authors: | Ring Dan, Volvo Aero Corporation AB, Sweden
Christiansson Anna-Karin, University of Trollhättan/Uddevalla, Sweden
Härefors Melker, Volvo Aero Corporation AB, Sweden |
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| Topic: | 2.1 Control Design |
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| Session: | Aircraft Turbofan Engine Control |
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| Keywords: | Engine control, Multivariable control systems, Fault tolerance, Nonlinear control, Estimators, H-infinity control |
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Abstract
A fault tolerant multivariable control system for a military turbofan engine has been developed at Volvo Aero Corporation in cooperation with University of Trollhättan/Uddevalla. Nonlinear multivariable controllers designed as scheduled linear H∞-controllers is used for engine control and the system is designed with multiple control modes to be able to get a more optimal control strategy. For the F404-RM12 engine multiple sensor faults can be tolerated with only minor control impact. Both analytical sensor redundancy and estimation of non-measurable engine parameters have been used to achieve this. The concept also adapts for engine-to-engine variations.
