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Optimal Design for Compliant Mechanism Flexure Hinges: Bridge-Type
Chia-Nan Wang1, Fu-Chiang Yang1, Van Thanh Tien Nguyen1,2
1Department of Industrial Engineering and Management, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan.
Micromachines
|November 27, 2021
Summary
Researchers optimized compliant mechanisms using grey relational analysis and finite element analysis. This design achieved a 65.36x displacement amplification ratio with minimal stress and friction, validated experimentally.
Area of Science:
- Mechanical Engineering
- Materials Science
Background:
- Compliant mechanisms offer advantages like larger workspaces and simpler structures.
- Traditional designs often face limitations in workspace and can experience friction and bending.
Purpose of the Study:
- To design optimal bridge-type compliant mechanism flexure hinges.
- Achieve high displacement magnification, low stress, and eliminate friction and bending.
Main Methods:
- Utilized Grey Relational Analysis (GRA) based on the Taguchi Method (TM).
- Employed Finite Element Analysis (FEA) for design optimization.
- Estimated Grey Relational Grade (GRG) using an Artificial Neural Network (ANN).
Main Results:
- Optimal dimensions were determined for the flexure hinges.
- Finite Element Analysis confirmed significant impact of design dimensions on stress and displacement.
- Experimental validation showed results within 6% deviation of predicted values.
Conclusions:
- The optimized compliant mechanism achieved a displacement amplification ratio of 65.36 times.
- The design successfully minimized stress and eliminated friction and bending.
- The integrated approach of GRA, TM, and FEA proved effective for optimizing compliant mechanisms.
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