Hybrid-Electric Engine Ratings for Propulsion Component Upgrades
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Solution Overview
Problem
Current aircraft propulsion systems, particularly hybrid-electric systems, face challenges in obtaining regulatory approval and type certification due to fixed engine ratings that do not account for upgrades or improvements in electrical propulsion subsystem components over time, leading to unrealized operational benefits and potential thermal engine degradation.
Innovation Solution
A method and system that allows for the replacement of original electrical propulsion subsystem components with upgraded alternatives, enabling the production of modified engine ratings based on the improved performance parameters of these components, thereby facilitating continuous certification and optimizing thermal engine operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed engine ratings are used for type certification, then regulatory approval is obtained, but the system cannot leverage improvements in electrical propulsion components over time
Solution Approach 1:
The patent applies dynamics by transitioning from fixed engine ratings to dynamic, adjustable ratings that can be modified when electrical propulsion components are upgraded. The system allows engine ratings to change over time based on component performance improvements, enabling the propulsion system to adapt to component upgrades while maintaining regulatory compliance through a modification approval process.
Solution Approach 2:
The patent implements parameter changes by allowing engine ratings (power, thrust, duration parameters) to be adjusted when electrical propulsion components are replaced or upgraded. The system modifies operating parameters such as power ratings and duration limits based on the performance characteristics of new components, enabling the system to leverage improvements while maintaining safety margins.
2Reliability
If original engine ratings are maintained after component replacement, then type certification is preserved, but thermal engine degradation occurs due to suboptimal power distribution
Solution Approach 1:
The patent applies parameter changes by adjusting engine ratings to reflect the improved capabilities of upgraded electrical propulsion components. This allows the thermal engine to operate at optimized power levels rather than being constrained by original ratings, reducing unnecessary degradation while maintaining type certification through the modification approval process.
Solution Approach 2:
The system implements feedback by continuously monitoring the performance characteristics of electrical propulsion components and adjusting engine ratings accordingly. When components are upgraded, the system receives feedback about improved performance parameters and modifies operating ratings to optimize thermal engine usage, preventing unnecessary degradation.
3Productivity
If upgraded electrical propulsion components are installed, then system performance improves, but regulatory compliance becomes uncertain
Solution Approach 1:
The patent resolves this contradiction by creating a dynamic regulatory compliance framework that allows engine ratings to be modified when components are upgraded. The system maintains compliance through an approved modification process that recalculates ratings based on new component performance, ensuring both improved productivity and continued regulatory validity.
Solution Approach 2:
The patent implements parameter changes by systematically adjusting engine ratings to match the performance characteristics of upgraded electrical propulsion components. This structured approach to modifying parameters ensures that performance improvements are achieved while maintaining regulatory compliance through proper approval channels.
4Reliability
If conservative power ratings are used, then safety margins are maintained, but component lifing is reduced due to unnecessary thermal engine operation
Solution Approach 1:
The patent applies parameter changes by adjusting engine ratings to optimize the balance between safety margins and component lifing. When electrical propulsion components are upgraded, the system modifies power and duration parameters to reflect actual capabilities, allowing the thermal engine to operate less frequently and reducing unnecessary degradation while maintaining adequate safety margins.
Solution Approach 2:
The patent implements parameter changes by systematically adjusting engine ratings to match the performance characteristics of upgraded electrical propulsion components. This structured approach to modifying parameters ensures that performance improvements are achieved while maintaining regulatory compliance through proper approval channels.
Data Source
AI summary
A method of and system for operating a hybrid-electric propulsion system is provided. The system has a thermal engine and an electrical propulsion subsystem having a plurality of components. The method includes providing a set of original engine ratings for operating the hybrid-electric propulsion system, the original engine ratings are based on one or more first performance/capability parameters of an original electrical propulsion subsystem component; replacing the original component with an alternative component, the alternative component having one or more second performance/capability parameters, wherein the second performance/capability parameters are different from the first performance/capability parameters; producing a set of alternative engine ratings based on the second performance/capability parameters; and operating the hybrid-electric propulsion system using the set of alternative engine ratings.