Trailing Edge Flap Actuation Assembly for Lightweight Multifunctional Wings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing actuation assemblies for multifunctional trailing edge flaps in aircraft wings are bulky and heavy, which affects fuel efficiency and emissions, and there is a need for improved load efficiency and robustness.
Innovation Solution
An actuation assembly with a base unit, an intermediate unit, and two actuators that allow for a compact and lightweight design, enabling controllable adjustability and rotation of the flap between retracted and extended positions, using a combination of hingeable and slidable connections, and a symmetrical mechanical arrangement to reduce aerodynamic drag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multifunctional trailing edge flap combines Fowler motion and aileron motions, then the effectiveness at same flap angles is improved, but the weight and size of the actuation assembly increases
Solution Approach 1:
The patent combines Fowler motion and aileron motions into a single multifunctional trailing edge flap assembly. The actuation assembly integrates a first actuator for Fowler motion and a second actuator for aileron motion into one unified structure, allowing the flap to perform both high-lift and roll control functions simultaneously, thereby improving versatility while managing weight through integration rather than separate assemblies
Solution Approach 2:
The trailing edge flap is designed as a universal component that can perform multiple functions: it can execute Fowler motion for high-lift generation during takeoff and landing, and simultaneously function as an aileron for roll control during cruise. This multi-functionality eliminates the need for separate high-lift devices and ailerons, addressing the weight concern while maintaining versatility
2Adaptability or versatility
If the flap spanwise width is increased for multifunctional operation, then the effectiveness at same flap angles is improved, but the aerodynamic drag increases
Solution Approach 1:
The patent employs dynamic positioning of the flap through two independent actuators that can adjust the flap to different configurations. The flap can be positioned at various angles and extensions depending on flight conditions, allowing it to optimize performance for both high-lift and roll control functions while minimizing drag in cruise conditions by retracting to a streamlined position
3Device complexity
If the actuation assembly uses traditional separate high-lift devices and ailerons, then the structural simplicity is maintained, but the fuel efficiency decreases
Solution Approach 1:
The patent merges traditionally separate high-lift devices and ailerons into a single multifunctional trailing edge flap assembly. This integration reduces the overall weight of the aircraft by eliminating redundant structures and components, directly improving fuel efficiency while maintaining structural coherence through a unified actuation system
Data Source
AI summary
Actuation assembly for a trailing edge flap of an aircraft wing, comprising: a base unit configured to be fixated to a main body of the aircraft wing; an intermediate unit movably connected to the base unit and configured to be hingeably connected to the flap at a leading edge of the flap about a first hinging axis extending along the leading edge of the flap, wherein the movability provides adjustability of the flap between a retracted flap position and an extended flap position; and a second actuator configured to controllably rotate the flap with respect to the intermediate unit about the first hinging axis, the second actuator being configured to be movable along with the intermediate unit with respect to the at least one base unit.