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COLREGS-Constrained Real-time Path Planning for Autonomous Ships Using Modified Artificial Potential Fields

Published online by Cambridge University Press:  16 November 2018

Hongguang Lyu*
Affiliation:
(Collaborative Innovation Research Institute of Autonomous Ship @ Dalian Maritime University, Dalian Maritime University, Dalian 116026, China) (Navigation College, Dalian Maritime University, Dalian 116026, China)
Yong Yin
Affiliation:
(Navigation College, Dalian Maritime University, Dalian 116026, China)
*
(E-mail: lhg@dlmu.edu.cn)

Abstract

This paper presents a real-time and deterministic path planning method for autonomous ships or Unmanned Surface Vehicles (USV) in complex and dynamic navigation environments. A modified Artificial Potential Field (APF), which contains a new modified repulsion potential field function and the corresponding virtual forces, is developed to address the issue of Collision Avoidance (CA) with dynamic targets and static obstacles, including emergency situations. Appropriate functional and safety requirements are added in the corresponding virtual forces to ensure International Regulations for Preventing Collisions at Sea (COLREGS)-constrained behaviour for the own ship's CA actions. Simulations show that the method is fast, effective and deterministic for path planning in complex situations with multiple moving target ships and stationary obstacles and can account for the unpredictable strategies of other ships. The authors believe that automatic navigation systems operated without human interaction could benefit from the development of path planning algorithms.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 2018 

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