Aircraft Seat Fixation Compensation Unit for Overload Protection
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Solution Overview
Problem
Aircraft seat fixation devices face challenges in ensuring safety by reducing loads on fixation rails during overload conditions, such as crashes, where existing systems may fail due to excessive twisting or deformation of the seat base structure.
Innovation Solution
The introduction of a compensation unit integrated into the aircraft seat fixation device, allowing for a destruction-free relative movement between the seat base structure and the cabin floor, primarily through rotational compensation, to absorb and distribute forces without causing mechanical damage, thereby reducing the stress on the fixation rails and maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the seat base structure is rigidly fixed to the cabin floor, then the fixation strength is improved, but the structural damage risk increases during overload conditions
Solution Approach 1:
The compensation unit introduces dynamic capability to the fixation system by enabling rotational movement between the seat base structure and cabin floor through a rotation axis, allowing the system to adapt to overload conditions while maintaining fixation strength during normal operation
Solution Approach 2:
The compensation unit acts as a pre-designed protective mechanism that absorbs overload forces through controlled rotation before these forces can cause structural damage to the seat base structure or cabin floor, effectively cushioning the system against crash forces
2Stability of the object's composition
If the fixation rail is rigidly connected to the cabin floor, then the fixation stability is improved, but the load on the fixation rail increases during overload
Solution Approach 1:
The compensation unit decouples the rigid connection between seat base structure and cabin floor by introducing a rotational degree of freedom, allowing the fixation rail to remain stable while reducing peak loads during overload through controlled movement
3Reliability
If the seat base structure is made more robust to withstand overload, then the safety is improved, but the device complexity and weight increase
Solution Approach 1:
The compensation unit segments the fixation system into movable and fixed components, with the rotation axis serving as a pivot point between the seat base structure and cabin floor, allowing safety functionality without requiring a completely redesigned robust structure
Solution Approach 2:
The compensation unit acts as an intermediary mechanism between the seat base structure and cabin floor, providing the safety function of overload protection through controlled rotation without requiring either component to be significantly strengthened
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 compensation unit enables the seat base structure to move relative to the cabin floor, reducing the risk of structural failure during overload conditions, allowing for a safer and more stable aircraft seat fixation system that can withstand crash forces without deforming or breaking, thus enhancing passenger safety.
Implementation Method 1
the compensation unit is configured, at least in an overload case, to permit at least a rotation of the seat foot around a rotation axis relative to the seat base structure
Data Source
AI summary
An aircraft seat fixation device for a fixation at least of a portion of an aircraft seat on at least one fixation rail that is fixated on an aircraft structure comprises a seat base structure which is configured such that at least the aircraft seat is mounted thereon at least partially, further comprises at least one seat foot which is connected to the seat base structure, and comprises at least one fitting element which is connected to the seat foot and is at least configured to be coupled with the fixation rail,wherein the aircraft seat fixation device comprises at least one compensation unit, which is arranged on the seat base structure, the seat foot and/or the fitting element and which is configured to permit at least one compensation movement of the seat base structure at least in an overload case.