Design and control of a complementary dual voice coil motor push-pull two-dimensional translational motion parallel precision motion platform

A voice coil motor-driven two-degree-of-freedom translational large-stroke decoupled micro-motion stage was proposed, which adopts a parallel dual-push-pull structure coupling straight flexible reed beams with a compound double parallelogram mechanism. Based on the push-pull driving principle of the voice coil motor and the configuration design of the dual-degree-of-freedom flexible mechanism, the static and dynamic characteristics of the platform were modeled using the force and deformation characteristics of the spring beam and the Lagrange equation, and an analytical model for calculating the static stiffness and natural frequency of the platform was obtained. Finite element analysis was conducted to validate the rationality and accuracy of the proposed models, and a control experimental system for the platform was constructed to compare trajectory tracking performance between single-push-pull and dual-push-pull modes. The experimental results show that the dual-push-pull mode has better tracking performance, higher precision, and better stability compared to the single-push-pull mode. The proposed complementary voice coil motor-driven large stroke flexible parallel precision motion platform features large stroke, high precision, and high stability characteristics, making it particularly suitable for large-stroke high-speed precision motion scenarios.