Controllable Refueling Drogue with Autonomous Guidance
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Solution Overview
Problem
In-flight refueling is challenging due to the need for precise positioning of rapidly moving aircraft, which existing systems struggle to automate efficiently, especially for drogue-based refueling systems, leading to increased costs and pilot workload.
Innovation Solution
A controllable refueling drogue system with a guidance system and actuators, including electro-active polymer actuators, that can autonomously position and steer the drogue during flight, using sensors and control systems to align with the receiver aircraft probe without manual guidance from the tanker aircraft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hose and drogue system is used for in-flight refueling, then the system is simpler and more adaptable to different aircraft types, but precise positioning of the drogue relative to the receiver aircraft becomes significantly more difficult
Solution Approach 1:
The drogue is equipped with its own actuatable device and guidance system that enables it to autonomously navigate and position itself relative to the receiver aircraft without requiring complex control systems on the tanker aircraft. The drogue independently adjusts its position using actuators that control vanes and canopy, making the system adaptable to different aircraft types while maintaining precise positioning.
Solution Approach 2:
The drogue incorporates movable vanes and an adjustable canopy that can dynamically change their configuration to control the drogue's position and orientation in flight. This dynamic adjustment capability allows the drogue to adapt to varying flight conditions and maintain precise positioning despite the flexibility of the hose connection.
2Measurement precision
If automated positioning systems with cameras and control systems are installed on tanker aircraft, then precise positioning can be achieved, but the cost and complexity of the tanker aircraft increases significantly
Solution Approach 1:
The guidance system and actuatable device are extracted from the tanker aircraft and installed directly on the drogue. This transfers the complexity and cost from the tanker aircraft to the drogue, allowing the tanker to remain relatively simple while still achieving automated precise positioning. The drogue becomes the intelligent component that autonomously positions itself.
Solution Approach 2:
The drogue acts as an intermediary between the tanker aircraft and the receiver aircraft. It carries the guidance and control systems, serving as the active element that manages the refueling connection. This intermediary approach allows automated positioning without requiring complex systems on either the tanker or receiver aircraft.
3Device complexity
If manual control of the drogue is used by the tanker pilot, then system complexity is reduced, but pilot workload increases and positioning precision decreases
Solution Approach 1:
The drogue's actuatable device and guidance system enable the drogue to autonomously control its own positioning without requiring manual input from the tanker pilot. The system automatically navigates and positions the drogue relative to the receiver aircraft, significantly reducing pilot workload while maintaining system simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system reduces pilot workload, increases the likelihood of successful coupling, and decreases the cost and complexity of retrofitting existing tanker aircraft by allowing fully automated drogue positioning and shape adjustment for various aircraft speeds, enhancing refueling efficiency and safety.
Implementation Method 1
The actuators can include one or more electro-active polymer actuators
Data Source
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AI summary
Controllable refueling drogues and associated systems and methods are disclosed. A system in accordance with one embodiment includes a fuel delivery device having a deployable portion configured to be deployed overboard an aircraft during aerial refueling. The deployable portion can include at least a portion of a flexible fuel line (123), a drogue (124) coupled to the flexible fuel line, and an actuatable device (226) operatively coupled to at least one of the drogue and the fuel line. The deployable portion can further include a guidance system (240) that is operatively coupled to the actuatable device and that includes instructions to direct the operation of the actuatable device and move the drogue during flight.