Dynamic model based cross-coupled control of parallel manipulators

Abstract

The dynamic model based cross-coupled control is developed to improve the coordination motion relation between multiple kinematic chains in parallel manipulators. According to the mechanism characteristic of the parallel manipulators, two different types of synchronization error of the kinematic chains are defined in the joint space of active joints and in the task space of end-effector, respectively. By using the synchronization error, the cross-coupled control law in the task space is designed based on the dynamic model. The trajectory tracking experiments of an actual planar parallel manipulator are carried out, and then the control performances between the cross-coupled controller and the augmented PD (APD) controller are compared.