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Application of reinforcement learning to fire suppression system of an autonomous ship in irregular waves

  • Lee, Eun-Joo (Graduate School, Dept. of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Ruy, Won-Sun (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Seo, Jeonghwa (Department of Naval Architecture & Ocean Engineering, Chungnam National University)
  • Received : 2020.06.07
  • Accepted : 2020.11.01
  • Published : 2020.12.31

Abstract

In fire suppression, continuous delivery of water or foam to the fire source is essential. The present study concerns fire suppression in a ship under sea condition, by introducing reinforcement learning technique to aiming of fire extinguishing nozzle, which works in a ship compartment with six degrees of freedom movement by irregular waves. The physical modeling of the water jet and compartment motion was provided using Unity 3D engine. In the reinforcement learning, the change of the nozzle angle during the scenario was set as the action, while the reward is proportional to the ratio of the water particle delivered to the fire source area. The optimal control of nozzle aiming for continuous delivery of water jet could be derived. Various algorithms of reinforcement learning were tested to select the optimal one, the proximal policy optimization.

Keywords

Acknowledgement

This research was financially supported by the Institute of Civil Military Technology Cooperation funded by the Defense Acquisition Program Administration and Ministry of Trade, Industry and Energy of Korean government under grant No. UM19304RD3.

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