Powered Lift Mode Switching for Energy-Efficient Winged Landing
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Solution Overview
Problem
Powered lift aircraft systems lack an efficient mechanism to dynamically switch between lift-enabled and lift-disabled modes based on aircraft state, leading to energy inefficiencies and potential safety risks during landing operations.
Innovation Solution
A control system that includes a pilot input device and a processor to control powered lift elements, allowing the aircraft to switch between powered lift enabled and disabled modes based on airspeed and other flight conditions, ensuring efficient energy use and safe landing procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If powered lift elements remain continuously enabled, then lift support is always available for vertical operations, but energy consumption increases and winged landing capability is compromised
Solution Approach 1:
The system dynamically switches the powered lift elements between enabled and disabled states based on flight phase and aircraft state. During vertical takeoff and landing phases, the lift elements are enabled to provide necessary lift support. During winged flight and landing phases, the lift elements are disabled to reduce energy consumption and prevent interference with aerodynamic landing operations.
Solution Approach 2:
The control system changes the operational parameter of the powered lift elements from an always-on state to a conditionally-active state. The system monitors aircraft state parameters (vertical mode flag, winged mode flag, airspeed, altitude) and adjusts the lift element activation status accordingly, transitioning between binary states of enabled and disabled based on flight conditions.
2Use of energy by moving object
If powered lift elements are disabled during winged landing, then energy efficiency improves and landing control is enhanced, but lift support availability is reduced
Solution Approach 1:
The system implements dynamic state switching where the powered lift elements are disabled during winged landing operations when the winged mode flag is set and airspeed exceeds the stall threshold. This dynamic adjustment ensures that lift support is unavailable only when aerodynamic lift from the wings is sufficient, maintaining safety while improving energy efficiency.
Solution Approach 2:
The control system continuously monitors flight parameters including airspeed, altitude, and mode flags to determine when to disable the powered lift elements. The system provides feedback-based control by comparing current aircraft state against predefined conditions (e.g., airspeed above stall threshold, winged mode activated) to make informed decisions about lift element activation, ensuring lift support is disabled only when safe and appropriate.
3Adaptability or versatility
If powered lift elements are always active, then vertical takeoff and landing capability is maintained, but interference with winged flight operations occurs
Solution Approach 1:
The system dynamically adjusts the operational state of the powered lift elements based on the selected flight mode. When vertical flight mode is selected, the lift elements are enabled to provide necessary lift. When winged flight mode is selected and airspeed conditions are met, the lift elements are disabled to prevent interference with aerodynamic flight control and landing operations.
Solution Approach 2:
The control system changes the activation parameter of the powered lift elements based on flight mode selection and aircraft state. The system transitions the lift elements between enabled and disabled states according to predefined conditions including vertical mode flag, winged mode flag, airspeed thresholds, and altitude constraints, ensuring appropriate functionality for each flight phase.
Data Source
AI summary
A control system for a powered lift aircraft includes a pilot input device, at least one powered lift element configured to provide powered lift support to the aircraft, and a processor. The processor is configured to receive, from the pilot input device, an input indicative of one of a powered lift enabled mode or a powered lift disabled mode and control the at least one powered lift element to operate the aircraft in a selected one of the powered lift enabled mode or the powered lift disabled mode based on the received input. When the aircraft is in the powered lift enabled mode, the at least one processor is configured to control the at least one powered lift element based on a state of the aircraft. When the aircraft is in the powered lift disabled mode, the at least one processor is configured to control the at least one powered lift element to disable powered lift.