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Design and analysis of the power-trigonometric function-shaped flexure hinges
Jiabiao Li1,2, Yang Zhao1,2, Qingwen Wu1,2
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
The Review of Scientific Instruments
|September 11, 2023
Summary
A new generalized flexure hinge model, power-trigonometric function-shaped flexure hinges (PTFHs), offers adaptable notch designs for diverse applications. PTFHs demonstrate superior comprehensive performance compared to traditional flexure hinges.
Area of Science:
- Mechanical Engineering
- Materials Science
- Precision Engineering
Background:
- Flexure hinges are crucial components in precision mechanisms.
- Existing flexure hinge designs have limitations in adaptability to various scenarios.
- There is a need for novel flexure hinge geometries offering improved performance and customization.
Purpose of the Study:
- To propose a generalized flexure hinge model: power-trigonometric function-shaped flexure hinges (PTFHs).
- To analyze the influence of design parameters on the PTFHs' geometry, compliance, and rotation precision.
- To validate the performance of PTFHs against conventional flexure hinges.
Main Methods:
- Derivation of the notch curve equation for PTFHs.
- Application of Castigliano's second theorem to derive compliance and rotation precision equations.
- Validation using finite element analysis (FEA) and experimental testing.
- Comparative analysis using a proposed parameter β.
Main Results:
- The PTFH model allows for diverse notch types by adjusting power and trigonometric function degrees.
- Derived compliance and rotation precision equations were validated with <8.5% error via FEA.
- PTFHs exhibited superior comprehensive performance compared to three common flexure hinge types.
- Static analysis and experimental verification confirmed the model's effectiveness.
Conclusions:
- The proposed PTFH model provides a versatile platform for designing flexure hinges with tailored characteristics.
- PTFHs offer enhanced compliance and rotation precision, making them suitable for demanding applications.
- The study validates the PTFH model's efficacy and potential for broader engineering use.
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