Structural Assembly Adjustment Using Kinematic Influence Matrix
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Solution Overview
Problem
The installation of complex structural assemblies in vehicles, such as aircraft door assemblies, requires highly experienced workers to adjust various parameters optimally, as existing methods lack efficiency in determining the necessary adjustments to fit the assembly correctly.
Innovation Solution
A method and system utilizing a kinematic model and influence matrix to apply a linear least squares algorithm, determining optimal linkage positions within defined thresholds to ensure precise fitting, incorporating both adjustable and non-adjustable linkages, and allowing for weighting and constant positions during the adjustment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual adjustment methods are used for complex structural assemblies, then installation can be performed without specialized equipment, but the process requires highly experienced workers and takes excessive time to achieve optimal fitting
Solution Approach 1:
The patent pre-calculates the kinematic influence matrix and determines optimal linkage positions before the actual installation process. By preparing the adjustment strategy in advance using computational methods, the system eliminates the need for experienced workers to perform time-consuming trial-and-error adjustments during installation, thus improving productivity while maintaining ease of operation.
Solution Approach 2:
The patent replaces manual mechanical adjustment methods with a computational system that uses linear least squares algorithms to calculate optimal linkage positions. This substitution of computational methods for manual mechanical processes dramatically reduces installation time and eliminates the dependency on highly experienced workers, resolving the contradiction between productivity and operational complexity.
2Manufacturing precision
If multiple iterative adjustments are performed to achieve geometric requirements, then fitting precision can be improved, but the number of iterations increases installation time and costs
Solution Approach 1:
The patent performs preliminary computational calculations to determine the optimal linkage positions that will achieve the desired geometric precision in a single adjustment rather than through multiple iterations. By pre-calculating the solution using the kinematic influence matrix and linear least squares algorithm, the system achieves high manufacturing precision while minimizing installation time.
Solution Approach 2:
The patent uses measurement data from observation points as feedback to validate whether the calculated linkage positions achieve the required geometric precision. This feedback mechanism allows the system to verify fitting accuracy without requiring multiple iterative adjustments, thus maintaining high precision while reducing installation time.
3Adaptability or versatility
If complex door assemblies with multiple cinematic linkages and connectors are used, then functional requirements can be met, but the assembly complexity increases and requires highly experienced workers for installation
Solution Approach 1:
The patent segments the complex door assembly into individual linkages with specific adjustable parameters. By breaking down the complex assembly into manageable segments and analyzing the kinematic influence of each linkage separately, the system can determine optimal adjustment positions for each component, thereby managing the complexity while maintaining the functional capabilities of the complete assembly.
Solution Approach 2:
The patent focuses on adjusting specific parameters of the linkages (such as linkage positions and orientations) to achieve optimal fitting. By identifying and adjusting only the critical parameters rather than modifying the entire complex assembly, the system maintains the functional versatility of the door assembly while simplifying the installation process and reducing the need for highly experienced workers.
Data Source
Figure 1~2
AI summary
The present invention pertains to a method (M) for adjusting a structural assembly, the method (M) comprising: obtaining (M1) a kinematic model of the structural assembly, the kinematic model comprising a plurality of adjustable linkages of the structural assembly; obtaining (M2) a kinematic influence matrix, the kinematic influence matrix comprising information regarding the influence of each of the adjustable linkage positions of the plurality of adjustable linkages on the measurement value at each observation point of a plurality of predefined observation points; defining (M6) upper and/or lower thresholds for each of the measurement values at each observation point of the plurality of predefined observation points; and applying (M7) a linear least squares algorithm to determine a tuple of linkage positions to which the plurality of adjustable linkages are to be adjusted in order to get the measurement value at each observation point of a plurality of predefined observation points within the defined upper and/or lower thresholds.