Integrating Maneuverable Planning and Adaptive Control for Robot Cart-Pushing under Disturbances
This work addresses a domain-specific problem in robotics for cart-pushing tasks, with incremental improvements in flexibility and robustness.
The paper tackles the challenge of precise and flexible cart-pushing for mobile robots by proposing a novel planning and control framework, demonstrating superiority over existing approaches in simulation and real-world experiments.
Precise and flexible cart-pushing is a challenging task for mobile robots. The motion constraints during cart-pushing and the robot's redundancy lead to complex motion planning problems, while variable payloads and disturbances present complicated dynamics. In this work, we propose a novel planning and control framework for flexible whole-body coordination and robust adaptive control. Our motion planning method employs a local coordinate representation and a novel kinematic model to solve a nonlinear optimization problem, thereby enhancing motion maneuverability by generating feasible and flexible push poses. Furthermore, we present a disturbance rejection control method to resist disturbances and reduce control errors for the complex control problem without requiring an accurate dynamic model. We validate our method through extensive experiments in simulation and real-world settings, demonstrating its superiority over existing approaches. To the best of our knowledge, this is the first work to systematically evaluate the flexibility and robustness of cart-pushing methods in experiments. The video supplement is available at https://sites.google.com/view/mpac-pushing/.