Magnetic Damping System for Aircraft Flutter Control
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Solution Overview
Problem
Conventional motion-damping systems for aircraft, such as hydraulic dampers, are complex, heavy, and costly, failing to effectively address vibration and flutter issues in external attached components like flaps during flight.
Innovation Solution
A motion-damping system comprising a rigid tubular structure with a magnetic assembly and a magnetically active body, where one is located within the tubular structure and the other is attached to either the base structure or the component, utilizing magnetic interaction to resist motion and dissipate energy through eddy currents, friction, or viscoelastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydraulic dampers are used to damp relative motion of external attached components, then vibration and flutter are reduced, but the system becomes complicated, heavy, and costly
Solution Approach 1:
The patent replaces the hydraulic damper system with a magnetic damping system that uses magnetic fields and eddy currents to achieve vibration damping. The magnetic assembly includes magnets that interact with a conductive body to generate eddy currents, which create opposing magnetic forces to dampen flutter without requiring hydraulic fluid, pumps, or complex mechanical linkages
Solution Approach 2:
The invention extracts and eliminates the hydraulic components (fluid, seals, pistons, reservoirs) from the damping system, retaining only the essential magnetic field interaction elements. This extraction simplifies the system architecture while maintaining the core vibration damping function through electromagnetic principles
2Object-affected harmful factors
If hydraulic dampers are used to damp relative motion of external attached components, then vibration and flutter are reduced, but the system becomes heavy
Solution Approach 1:
The patent replaces the heavy hydraulic damper system with a lightweight magnetic damping system. The magnetic assembly consists of magnets, a conductive body, and magnetic circuit elements that generate eddy currents for damping, eliminating the need for heavy hydraulic fluid, thick-walled pressure vessels, and complex mechanical linkages
Solution Approach 2:
The invention changes the fundamental operating principle from hydraulic pressure-based damping to electromagnetic eddy current-based damping. This parameter change allows the system to achieve equivalent or superior damping performance with significantly reduced mass, as electromagnetic forces can be generated without the bulk of hydraulic components
3Object-affected harmful factors
If hydraulic dampers are used to damp relative motion of external attached components, then vibration and flutter are reduced, but the system becomes costly to implement and maintain
Solution Approach 1:
The patent replaces the costly hydraulic damper system with a magnetic damping system that uses electromagnetic principles. The magnetic assembly with magnets and conductive body eliminates the need for expensive hydraulic fluid, high-pressure seals, and complex mechanical linkages that require costly manufacturing and maintenance
Solution Approach 2:
The magnetic damping system uses simple, inexpensive components such as permanent magnets, conductive plates or bodies, and magnetic circuit elements. These components have no consumable fluids or wear-prone seals, making them cheaper to manufacture and maintain compared to hydraulic systems that require periodic fluid changes and seal replacements
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
The system provides an efficient, lightweight, and cost-effective means to damp relative motion and vibration between the base structure and attached components, effectively reducing flutter and vibration without the need for hydraulic components or active control.
Implementation Method 1
dissipating energy with the motion-damping system during rotation of the attached component relative to base structure... dissipating energy via generation of an eddy current
Implementation Method 2
dissipating energy with the motion-damping system during rotation of the attached component relative to base structure... dissipating energy via a frictional force
Data Source
AI summary
Motion-damping systems and methods that include motion-damping systems are disclosed herein. The motion-damping systems are configured to damp relative motion between a base structure and an attached component that define a gap therebetween. The systems include an at least substantially rigid tubular structure that defines an internal volume and extends within the gap. The systems also include a magnetic assembly and a magnetically active body. One of the magnetic assembly and the magnetically active body is located within the tubular structure and the other of the magnetic assembly and the magnetically active body is operatively attached to a selected one of the base structure and the attached component. The magnetic assembly is in magnetic communication with the magnetically active body such that a magnetic interaction therebetween resists motion of the attached component relative to the base structure. The methods include dissipating energy with the motion-damping system.