Design of stroke reduction mechanism based on differential principle

Abstract

An elastic stroke reduction mechanism based on the principle of differential lever is designed. The mechanism uses flexible hinges to transfer potential energy, and the displacement of the input end is transferred to the output end through the designed reduction ratio, so that the displacement resolution is improved, and the nonlinear and hysteresis errors are small. Firstly, the theoretical model of the stroke reduction mechanism is designed by differential principle and flexible hinge, then the static and modal analysis of the mechanism is carried out by ANSYS finite element, and the stroke reduction ratio of the mechanism is simulated to be 31.55 times. Finally, an experimental platform is built to measure the displacement output characteristics of the mechanism. The experimental results show that the designed stroke reduction mechanism has a displacement reduction ratio of 30.4 times, and the error with the simulation results is only 3.6%, which is consistent. At the same time, the dynamic input test shows that the mechanism has good dynamic stability and controllability.