A Decoupled Global-Local Planning Framework for COLREGs-Aware Maritime Autonomous Surface Ships in Coastal Waters (opens in a new tab)
This paper introduces a decoupled framework for COLREGs-compliant autonomous ship navigation in coastal waters, separating global path planning from local collision avoidance. The global layer uses Adaptive Angular-Domain Potential Field (AAPF) for path generation and Farsighted Sweep Trajectory Optimization (FSTO) for refinement, while the local layer employs Environment-Adaptive Dynamic Window Approach (EA-DWA) for real-time risk assessment and avoidance. Simulations demonstrate reduced computational burden and improved path usability, though performance depends on environment-specific parameter adjustments. The approach ensures compliance with maritime collision regulations while balancing efficiency and adaptability.