Force Measurement Branch Structure Using Elastic Resistance Error
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Solution Overview
Problem
Current force measurement systems face challenges in structural design due to the reliance on coupling error as an indicator, which is influenced by multiple factors and lacks clarity in sensitivity, leading to poor structural forward design effects and constrained development of high-precision vector force measurement technology.
Innovation Solution
A structure optimization method for force measurement branches that uses elastic resistance error coefficients, ignoring deformation factors, to improve design accuracy and efficiency by treating elastic resistance error as an evaluation indicator, combining it with finite element simulation to optimize structure parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If coupling error is used as the design indicator for force measurement branches, then the measurement precision can be improved, but the device complexity increases and the design process becomes less efficient
Solution Approach 1:
The patent extracts the elastic resistance error component from the complex coupling error indicator. By identifying and separating the elastic resistance error (which has clear sensitivity to structural parameters) from other coupling error sources, the design can focus on this specific component using simplified evaluation indicators, thereby reducing design complexity while maintaining measurement precision improvement
Solution Approach 2:
The patent changes the design indicator from coupling error to elastic resistance error evaluation indicators. This parameter change simplifies the design process by providing clearer sensitivity relationships with structural parameters, enabling more efficient optimization while still achieving improved measurement precision through better structural design
2Manufacturing precision
If finite element analysis is used for detailed design of force measurement branches, then the manufacturing precision can be improved, but the productivity decreases due to time-consuming analysis
Solution Approach 1:
The patent performs preliminary structural design using simplified elastic resistance error evaluation indicators before conducting detailed finite element analysis. This preliminary action establishes reasonable initial parameters and design directions, reducing the number of iterative FEM analyses needed and thereby improving productivity while maintaining manufacturing precision
Solution Approach 2:
The patent applies partial FEM analysis focus by using simplified indicators for initial design and only performing comprehensive FEM analysis on critical cases or final verification. This partial approach reduces overall analysis time and computational resources while still ensuring manufacturing precision for the most critical design decisions
3Measurement precision
If comprehensive parameter iterative optimization is conducted to optimize force measurement branch structure, then the measurement precision can be improved, but the loss of time increases due to complex and time-consuming analysis workflows
Solution Approach 1:
The patent segments the design optimization process into two stages: first using simplified elastic resistance error indicators for preliminary optimization, then using FEM analysis for final verification and fine-tuning. This segmentation reduces the time required for comprehensive iterative optimization while still achieving improved measurement precision through the combined approach
Data Source
AI summary
The main structure optimization of the force measurement system is divided into three parts: structure parameter optimization of force measurement branches, structure parameter optimization of non-branch structures, and structure parameter fine-tuning of the entire force measurement system. Quantitative design is performed on each part to improve the design efficiency and accuracy of the force measurement system. During the quantitative design process of each part, an elastic resistance error is treated as a forward design indicator and is one of the main components in a coupling error. The structure parameters involved in the elastic resistance error are relatively comprehensive, and the elastic resistance error is considerably correlated with the structure parameters of the force measurement system in consideration of the influence of axial stiffness and lateral deviation stiffness of force measurement on the structural performance. The accuracy of structural analysis and design are thus ensured.