Study on Optimization for Four Bar-Partially Compliant Mechanism

This paper concentrates on the application of fuzzy logic based on Taguchi method (FLTM) for multiobjective optimization of the small-length flexural pivot (belongs to link 4) in partially four bar-compliant mechanisms. The input parameters such as the input torque and the crank angle of link 2 were optimized with considerations of the multiple performance measures as angular displacement and stress of the small-length flexural pivot. Angular displacement and stress of the small-length flexural pivot are two objective functions were formulated using pseudo-rigid-body model (PRBM) and principle of virtual work. The results found that the input torque at level 1 of 3 Nm and crank angular at level 1 of 100 degrees are favorable parameters for compliant flapper mechanism. Based on ANOVA, the results showed that input torque is the most significant with respond highest value of F test of 4.1752.