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This paper introduces a hierarchical planning-control framework for mobile robot navigation in human-robot collaborative environments, aiming to improve both safety and efficiency. The framework integrates an enhanced Dynamic Window Approach (DWA) for local path planning with a modified Model Predictive Control (MPC) for path tracking, incorporating path tracking constraints during path generation and considering path characteristics in the control process. Simulation and real-world experiments demonstrate the framework's superior performance compared to traditional decoupled planning and control methods.
Achieve safer and more efficient mobile robot navigation by tightly integrating path planning and control, outperforming traditional decoupled approaches.
In human–robot collaborative environments, the inherent complexity of shared operational spaces imposes dual requirements on process safety and task execution efficiency. To address the limitations of conventional approaches that decouple planning and control modules, we propose a hierarchical planning–control framework. The proposed framework explicitly incorporates path tracking constraints during path generation while simultaneously considering path characteristics in the control process. The framework comprises two principal components: (1) an enhanced Dynamic Window Approach (DWA) for the local path planning module, introducing adaptive sub-goal selection method and improved path evaluation functions; and (2) a modified Model Predictive Control (MPC) for the path tracking module, with a curvature-based reference state online changing strategy. Comprehensive simulation and real-world experiments demonstrate the framework’s operational advantages over conventional methods.
