Pneumatic Floating Platform Structure for Helicopter Vibration Isolation
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Solution Overview
Problem
Rotary wing aircrafts, such as helicopters, face challenges in providing a stable operating platform for missions like medical transports, camera shooting, and sniper operations due to vibrations induced by the main rotor, which existing vibration dampening technologies are unable to effectively address.
Innovation Solution
A vibration dampening structure featuring a floating body supported by a pneumatic shock absorber system with multiple pneumatic shock absorbers in three Cartesian coordinate directions, forming piston-type dampers with vibration-dampening air-bed layers, allowing for decoupling from aircraft vibrations and providing a stable platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vibration dampening structures (pistons, viscous fluid dampers, elastic bodies) are used, then the structure can be simple and lightweight, but the vibration dampening effectiveness is insufficient for rotary wing aircraft operations
Solution Approach 1:
The vibration dampening structure is divided into multiple independent pneumatic shock absorbers, each handling specific vibration directions. The system segments vibration control into three Cartesian coordinate directions, with dedicated absorbers for each axis, allowing independent optimization of each component while achieving comprehensive vibration suppression.
Solution Approach 2:
The patent employs pneumatic shock absorbers instead of conventional mechanical or viscous fluid dampers. The pneumatic system uses compressed air springs and dashpots to provide both elastic support and viscous damping, achieving superior vibration isolation performance while maintaining structural simplicity and adaptability to rotary wing aircraft environments.
2Reliability
If active vibration suppression mechanisms with actuators and control units are implemented, then vibration suppression capability is enhanced, but the device complexity and maintenance requirements increase significantly
Solution Approach 1:
The pneumatic shock absorbers are designed as passive, self-regulating components that automatically adapt to vibration conditions without requiring external control systems. The compressed air springs and dashpots inherently provide vibration isolation through their physical properties, eliminating the need for sensors, actuators, and control units while maintaining effective vibration suppression.
3Reliability
If multiple vibration dampening components are added to cover all vibration directions, then vibration dampening coverage is improved, but the weight and space requirements increase
Solution Approach 1:
Each pneumatic shock absorber is designed as a multi-functional component that simultaneously provides elastic support, viscous damping, and vibration isolation across multiple directions. The compressed air spring system can accommodate vibrations in various orientations, reducing the total number of components needed while maintaining comprehensive vibration coverage.
Solution Approach 2:
The patent addresses three-dimensional vibration control by configuring pneumatic shock absorbers to handle vibrations in three Cartesian coordinate directions. Rather than adding separate dampers for each direction, the system uses spatial arrangement and pneumatic elasticity to provide omnidirectional vibration isolation, reducing overall structure weight and complexity.
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 solution effectively stabilizes the floating body relative to the aircraft, enabling precise operations by compensating vibrations in all directions, allowing for comfortable and precise movements on the platform, and is customizable for ergonomic improvements.
Implementation Method 1
a vibration dampening structure for dampening vibrations occurring during operation of a rotary wing aircraft
Implementation Method 2
a pneumatic shock absorber system that couples the floating body to the mounting device and dampens the vibrations occurring during operation of the rotary wing aircraft
Implementation Method 3
The piston and the associated piston cup form a vibration dampening air-bed layer
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention is related to a vibration dampening structure 7 for dampening vibrations occurring during operation of a rotary wing aircraft 1, comprising: a floating body 8; and a floating body support structure 9 that supports the floating body 8. The floating body support structure 9 comprises a mounting device 10 that is rigidly mountable to the rotary wing aircraft 1; and a pneumatic shock absorber system 29 that couples the floating body 8 to the mounting device 10. The pneumatic shock absorber system 29 dampens the vibrations occurring during operation of the rotary wing aircraft 1 for stabilizing the floating body 8 relative to the mounting device 10.