Aircraft Seat Backrest Modularity to Avoid Recertification Delays
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Solution Overview
Problem
Aircraft seat backrest assemblies require recertification when seat size changes, leading to increased turnaround time due to the need for reconfiguration and adherence to various certification requirements, which is time-consuming and inefficient.
Innovation Solution
A modular backrest structure with a detachable design featuring a back shell, beams, headrest adapter, torque adapter, and cover plate, allowing for adjustable width and aesthetic customization without mandatory re-certification, enabling rapid configuration changes and standardization of attachment schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest assembly is reconfigured when seat size changes, then the seat can accommodate different size requirements, but the recertification process increases turnaround time
Solution Approach 1:
The backrest assembly is divided into modular components including a headrest assembly, backrest assembly, and seat pan assembly that can be independently configured and attached to different seat structures. This segmentation allows each module to be certified independently, enabling size variations without full recertification of the entire assembly.
Solution Approach 2:
The backrest assembly is designed with universal attachment features and standardized interfaces that allow it to be mounted on different seat sizes and configurations. The modular design enables the same backrest module to serve multiple seat size requirements, eliminating the need for size-specific recertification.
2Shape
If the backrest assembly is reconfigured for aesthetic considerations, then the seat design can be updated, but the recertification process delays the redesign
Solution Approach 1:
The backrest assembly is segmented into interchangeable cosmetic covers and structural components. Aesthetic changes can be implemented by replacing covers or surface elements without modifying the certified structural framework, allowing design updates without recertification.
Solution Approach 2:
Aesthetic elements such as covers, trim pieces, and surface finishes are extracted as separate replaceable components from the certified structural assembly. This allows cosmetic redesigns to be implemented independently of the structural certification process.
3Ease of manufacture
If the backrest assembly uses a fixed design, then manufacturing is simplified, but adaptability to different seat sizes is reduced
Solution Approach 1:
The assembly is segmented into standardized modules with consistent manufacturing processes. Each module is manufactured using the same proven methods and quality standards, maintaining manufacturing simplicity while enabling configuration flexibility through modular assembly.
Solution Approach 2:
Standardized structural components are designed with nested or hierarchical relationships where larger assemblies contain smaller standardized sub-assemblies. This nesting allows a single production line to manufacture components that can be combined in multiple configurations for different seat sizes.
Data Source
Figure 1
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Figure 2B
AI summary
A modular backrest structure. The backrest includes a back shell (210). The back shell (210) is changed to customize the aesthetic of the seat. The backrest includes a beam. The back shell (210) is coupled to the beam and adapters. The beam and adapters are configurable to multiple widths. The multiple widths of the allow for changing the back shell (210) without changing the beam and the adapters. The beam and adapters provide a standardized attachment scheme to eliminate variations arising out of the different back shell (210)s.