Backup Control for a Variable Cycle Engine.
Final technical rept. 1 Sep 77-16 Apr 79 on Phase 2,
GENERAL ELECTRIC CO CINCINNATI OH AIRCRAFT ENGINE GROUP
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The next generation of variable cycle aircraft engines VCE will have an increased complexity associated with the number of controlled engine variables, inherent cycle variability, and inlet-engine-exhaust control integration. This level of engine complexity and the expanding integration of aircraftengine controls causes a commensurate increase in the control system complexity and capacity. Digital electronics has been identified as the only viable means for meeting these significantly more sophisticated requirements of the future VCE. Although recent digital electronic advances promise new levels of reliability, this improvement is offset by the increased circuitry of the more complex control. Especially in the case of the single-engine aircraft, it is recognized that such variable cycle engines should be equipped with a Backup Control for emergency use. The recommended hydromechanical approach has been constructed, calibrated and evaluated in a test cell. These evaluations included transient operation and transfer form the primary control to the backup control and back to primary operation. Successful operation was achieved, providing test hardware which is intended for further validation through on-engine testing.
- Attack and Fighter Aircraft
- Jet and Gas Turbine Engines