Abstract:

This paper presents a framework for the planning and control of wheeled mobile manipulators, integrating a novel reduced-order dynamics model that can be used during motion planning to enhance safety and prevent tip-overs. Leveraging centroidal momentum dynamics, the model captures key forces at the center of mass, enabling efficient, dynamically feasible trajectory generation that considers both manipulator motion and ground interaction forces. Unlike traditional methods that rely on conservative planning or separate reactive tip-over prevention mechanisms, our approach incorporates stability considerations directly into the motion planning phase. By embedding the zero moment point criterion within the model, our framework ensures tip-over prevention even during fast and payload-intensive tasks. Simulations demonstrate the effectiveness of this approach, achieving stable and efficient task execution across various scenarios.