Variable Inlet Geometry Mechanism Control for Aircraft Engines
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Solution Overview
Problem
Existing control systems for gas turbine engines with variable geometry mechanisms provide a common schedule for all engines, limiting operability and performance, especially in varying wind conditions and aircraft positions.
Innovation Solution
A system and method that receive input signals for engine operating parameters and crosswind levels to determine a customized schedule for positioning the variable inlet geometry mechanism, allowing for optimized engine performance and improved crosswind tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a common VGM schedule is provided for all engines, then the control system is simple, but engine operability and performance are limited
Solution Approach 1:
The patent segments the control system by creating separate VGM schedules for different engines based on their specific operating conditions, engine positions, and performance characteristics. Each engine receives a customized schedule rather than a common one, allowing tailored optimization for each engine's unique operational context.
Solution Approach 2:
The patent implements dynamic adjustment of VGM schedules based on real-time operating parameters, engine position, and performance data. The control system continuously adapts the schedules to changing conditions, making the control approach flexible and responsive rather than static and rigid.
2Productivity
If engine-specific VGM schedules are implemented, then engine performance is optimized, but control system complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms that monitor engine operating parameters, performance metrics, and environmental conditions. This feedback is used to continuously refine and adjust engine-specific VGM schedules, ensuring optimal efficiency while managing control complexity through data-driven decision making.
Solution Approach 2:
The patent optimizes engine efficiency by dynamically changing VGM parameters based on operating conditions, engine position, and performance data. The system adjusts geometry mechanism positioning parameters to maximize productivity and efficiency for each specific engine configuration.
3Object-affected harmful factors
If VGM control is adjusted for crosswind conditions, then crosswind tolerance is improved, but measurement and control difficulty increases
Solution Approach 1:
The patent uses intermediary parameters such as airspeed measurements and engine operating data as proxies for direct crosswind measurement. By monitoring these intermediate variables and their relationship to crosswind conditions, the system indirectly detects and responds to crosswind-induced distortion without requiring direct crosswind sensing.
Data Source
AI summary
A system and method for controlling a variable inlet geometry mechanism of an aircraft engine. At least one first input signal indicative of at least one operating parameter of an aircraft engine is received. At least one second input signal indicative of a level of crosswind experienced by the aircraft and of an airspeed of the aircraft being below a predetermined threshold is received. A schedule is determined for positioning a the variable inlet geometry mechanism based on the at least one first input signal and of the at least one second input signal. The variable inlet geometry mechanism is then positioned in accordance with the schedule.