Hybrid control for swing up and balancing pendubot system: An experimental result

Abstract

This paper presents a hybrid control which includes swing-up and balancing control for pendubot system - a two-link under-actuated robot. The parameters of the pendubot system are measured in the actual pendubot system built in the automation lab, University of Technology and Education HCM City. A hybrid controller which drives the system close to the equilibrium manifold and maintains the system stabilization in the upright position will be developed. The proposed control consists of two stages: swing-up control using partial feedback linearization, and balancing control using linear quadratic regulator. Finally, the controller is verified through both simulation and experimental results. The stability of the pendubot system in simulation showed that the proposed hybrid controller works well. However, the control quality in the experimental model still has some limitations.