Static Probe Fastening With Peelable Shims for Flush Skin Alignment
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Solution Overview
Problem
The existing fastening systems for static probes on aircraft struggle to achieve a flush fit with the aircraft skin after painting, due to irregularities in the paint layer, which can affect air turbulence measurements and measurement accuracy.
Innovation Solution
A decentralized alignment system using a plate with alignment elements, a backplate, peelable shims, and alignment devices allows for fine adjustment of the static probe's position relative to the aircraft skin, ensuring a flush fit even with uneven paint layers, by using external or internal threads and splints to secure the alignment elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If large-area tolerance compensation layers are used to achieve uniform alignment, then manufacturing precision is improved, but adaptability to paint layer irregularities deteriorates
Solution Approach 1:
The alignment system is divided into multiple discrete alignment elements distributed across the plate surface, each capable of independent adjustment. This segmentation allows localized compensation for paint layer irregularities while maintaining overall alignment precision, resolving the contradiction between uniform alignment and adaptability to variations.
Solution Approach 2:
The alignment elements are designed to be adjustable rather than fixed, enabling dynamic adaptation to different paint layer conditions. The peelable shims allow for fine-tuning of alignment after painting, transforming a static alignment system into a dynamic one that can accommodate paint layer irregularities while maintaining precision.
2Manufacturing precision
If alignment is performed before painting, then manufacturing precision is improved, but reliability after painting deteriorates
Solution Approach 1:
The system performs preliminary alignment using the alignment elements and peelable shims before final painting, establishing a precise baseline configuration. The adjustable design allows for post-painting verification and correction, ensuring that the preliminary alignment remains reliable despite paint layer variations.
Solution Approach 2:
The alignment elements provide a reference framework that allows for verification and adjustment after painting. This feedback mechanism ensures that any deviations caused by painting can be detected and corrected, maintaining alignment reliability throughout the manufacturing process.
3Manufacturing precision
If multiple alignment elements are added for precise adjustment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
Alignment elements are strategically positioned at critical locations on the plate rather than uniformly distributed, providing precise local adjustment where needed most. This approach achieves high form combination accuracy while minimizing the total number of alignment elements, thereby controlling system complexity.
Solution Approach 2:
The alignment function is extracted into separate, modular alignment elements that can be independently adjusted and removed if necessary. This modularity simplifies the overall system design compared to integrated alignment mechanisms, reducing complexity while maintaining precision.
Data Source
AI summary
A probe fastening system has a plate having at least one coupling-on recess and having at least one alignment element, which is arranged in the outer region of the plate, a backplate which has a fastening device for the fastening of a static probe and at least one recess which corresponds with the alignment element, at least one peelable shim which corresponds with the alignment element and which is arranged between the plate and the backplate, at least one alignment device which corresponds with the alignment element, and a coupling-on element which defines a cavity and which is designed for isobarically coupling the static probe onto the coupling-on recess.