Computed Methodology for Design and Optimization on Parameters of a Tensural Displacement Amplifier Employing Flexible Hinges


Ngoc-Thai Huynh†, Quoc-manh Nguyen‡,*, Lam Kim Thanh Vo†


†Faculty of Automotive Engineering Technology, Industrial University of Ho Chi Minh City, Vietnam 700000.
‡ Faculty of Mechanical Engineering, Hung Yen University of Technology and Education, Hung Yen, Vietnam

Corresponding Author Email: nguyenquocmanh@utehy.edu.vn

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The compliant mechanism always requires large workspace, high frequency, low stress and correct positioning. As the stress is higher and more easily leads to failure. The Taguchi method (TM) and grey relational analysis (GRA) are proposed herein to optimize the design parameters of a tensile displacement amplifier employing flexible hinges (FH) mechanism; they are investigated and discussed in this paper. This mechanism was designed and analyzed by Solidworks and Finite element method (FEM) in ANSYS. The FEM results demonstrated that the design parameters have an important effect on displacement (DI) and stress (ST) with input DI of 0.01 mm. The problem was verified by TM and analysis of variances (ANOVA). The predicted and the optimal values are good agree with displacement and stress deviation error of TM were 2.96% and 3.18%, respectively, of GRA are 0.68% and 0.79%, respectively. The optimal displacement and stress results obtained were by TM are 0.6196 mm and 54.03 MPa and GRA were 0.6140 mm and 53.261 MPa, respectively. The optimal displacement amplification ratio (DAR) was obtained by TM was 61.96 and GRA was 61.4.