Analysis of Position, Pose and Force Decoupling Characteristics of a 4-UPS/1-RPS Parallel Grinding Robot

For the application of parallel robots in the grinding industry, a parallel robot equipped with a constant force actuator that produces a constant force for grinding is designed. To study the characteristics of the parallel robot's spatial positions and poses, the inverse solutions of the moving platform's spatial positions and poses as well as the workspace where objects were ground were established by using DH parameters and geometric methods. The experimental results showed that the workspace where objects were ground was a cylinder with a cross section similar to a symmetric circular sector. To analyze the characteristics of the forces produced by the parallel robotic system, the dynamics equation was established via the Newton-Euler method to verify the rationality of the force decoupling design. Theoretical calculation combined with simulation and experimental analyses confirmed the viability of the theoretical analyses which lay a theoretical foundation for the design, manufacture and control of the parallel robotic system proposed in this paper.

Automated summary

In this study, a parallel robot equipped with a constant force actuator for grinding applications was designed. The characteristics of the robot's spatial positions and poses were analyzed using DH parameters and geometric methods. The workspace for grinding objects was found to be a cylindrical shape with a cross section similar to a symmetric circular sector. The forces produced by the robot system were analyzed using the Newton-Euler method, and the rationality of the force decoupling design was verified. The theoretical analyses were confirmed through theoretical calculations, simulations, and experimental analyses, providing a theoretical foundation for the design, manufacture, and control of the proposed parallel robot system.