Robust parameter design for a compliant microgripper based on hybrid Taguchi-differential evolution algorithm

This paper proposes a new approach to robust optimal parameter design for a compliant microgripper in order to enhance its qualities. Hybridization of Taguchi method with differential evolution algorithm (HTDE) is integrated to optimize the displacement and frequency, simultaneously. Firstly, the Taguchi L ₂₇ (3¹³) orthogonal array is used to establish the experimental layout. Based on the signal to noise (S/N) ratios and analysis of variance, the search spaces of design variables are refined. Secondly, to achieve the accurate optimal results, the mathematical equation is developed based on a normalized S/N ratios to determine the weight factor for the displacement and frequency. Thirdly, the refined design space is optimized using the HTDE. The results showed that the proposed HTDE outperforms the other methods such as AEDE, TGRA, TGA, PSOGSA, and TPSO. The proposed approach can facilitate a robust design process for micro/nano manipulations and technologies.