Automated guidance of peg-in-hole assembly tasks for complex-shaped parts

Abstract

To prevent the failure of peg-in-hole assembly tasks involving geometrically complex parts, a force control-based assembly strategy that takes geometric information into account is required. Therefore, in this study, we propose an assembly strategy for complex-shaped parts which performs force control based on visually-obtained geometric information and CAD models. CAD models are used to obtain geometric information about the parts, and a camera is used to track their position and orientation. In addition, an impedance control scheme is used to control the contact force to avoid excessive force during assembly tasks. The performance of the proposed guidance algorithm was evaluated by a series of experiments using arbitrary complex-shaped parts.