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Abstract The block erection using a gantry crane is an important process for the production of the ships in a shipyard. The motion of the block should be controlled accurately under the external forces to prevent collision with the structures and the excessive loads on wire ropes. However, it is difficult to control the block during the lifting because the movement of the block is indirectly controlled with various objects such as trolleys, hooks, equalizers, and wire ropes. Therefore, we proposed the Deep Reinforcement Learning (DRL)-based block lifting method in this study. The DRL-based block lifting method can control the block under the change of the center of gravity and modelling uncertainty. Furthermore, the DRL-based block lifting method can provide robust control with an unexpected motion of the block due to the unexpected external disturbance. The position, orientation and angular velocity of the block and hoisting speed of wire ropes were set as the input state of the neural network of DRL. The hosting speed of wire ropes was controlled as the output action of DRL. The functions to minimize the change of orientation and to stabilize the speed of the block were set as the reward of DRL. In this study, the deep deterministic policy gradient (DDPG) method of DRL, which is a kind of off-policy actor-critic method, was applied to solve the problem with continuous state space and continuous multi-action space. To verify the DRL-based block lifting method proposed in this study, it was compared with traditional control algorithms for various simulation examples. As a result, the proposed method could effectively control the block with the modelling uncertainty. Also, the proposed method could respond to the unexpected motion of the block effectively due to the unexpected external disturbance.
Publication Date 2022-04-28

Do-Hyun Chun, Myung-Il Roh, Hye-Won Lee, Seung-Ho Ham, "A Block Lifting Method with Wire Ropes Based on Deep Reinforcement Learning", Proceedings of ICDM(International Conference on Decarbonization and Digitalization in Marine Engineering) 2022, Si-Heung, Korea, 2022.04.28-29


List of Articles
번호 분류 제목 Publication Date
486 Domestic Conference 한인수, 노명일, 공민철, 이정렬, 박서윤, "자연어 처리 기술을 활용한 선박 규정 검색 알고리즘", 대한조선학회 추계학술발표회, 울산, pp. 113, 2023.11.02-03 file 2023-11-02
485 Domestic Conference 김정연, 노명일, 이현승, 이인석, 김미진, 신동규, 유한준, "도면 내 배관 시스템의 자동 매칭 알고리즘", 2023년도 대한조선학회 추계학술발표회, 울산, 2023.11.02 file 2023-11-02
484 Domestic Conference 공민철, 노명일, 하지상, 김미진, 김정연, "GNN 기반 P&ID의 패턴 인식 및 분석 방법", 2023년도 대한조선학회 추계학술발표회, 울산, pp. 108, 2023.11.02-03 file 2023-11-02
483 International Conference Yeong-min Jo, Myung-Il Roh, Hye-Won Lee, Jisang Ha, Do-Hyun Chun, Min-chul Kong, "An Improved Method for the Sensor Fusion for Autonomous Ships", Proceedings of 10th PAAMES and AMEC 2023, Kyoto, Japan, 2023.10.18-20 file 2023-10-20
482 International Conference In-Chang Yeo, Myung-Il Roh, Hye-Won Lee, Donghun Yu, "A Method for Automatic Berthing of a Ship Using LIDAR", Proceedings of 10th PAAMES and AMEC 2023, Kyoto, Japan, 2023.10.18-20 file 2023-10-19
481 International Conference Min-Chul Kong, Myung-Il Roh, Jisang Ha, Mijin Kim, Jeoungyoun Kim, "A Method for the Generation of Optimal Patterns for Equipment Unit Modules in the Engine Room", Proceedings of 10th PAAMES and AMEC 2023, Kyoto, Japan, 2023.10.18-20 file 2023-10-19
480 Domestic Conference 여인창, 노명일, 공민철, 민동기, 정동근, "선박의 Safety Plan 검토를 위한 자동 데이터 생성과 딥 러닝 기반 객체 검출", 2023년도 한국CDE학회 하계학술발표회, 제주, pp. 13, 2023.08.23-26 file 2023-08-25
479 Domestic Conference 한인수, 노명일, 공민철, "딥 러닝을 활용한 P&ID 내 장비 인식 방법", 2023년도 한국CDE학회 하계학술발표회, 제주, pp. 11, 2023.08.23-26 file 2023-08-25
478 Domestic Conference 공민철, 노명일, 여인창, 민동기, 정동근, "그래프를 활용한 P&ID 내 장비의 연결 관계 표현 및 분석", 2023년도 한국CDE학회 하계학술발표회, 제주, p. 53, 2023.08.23-26 file 2023-08-24
477 Domestic Conference 김하연, 노명일, 하지상, 조영민, 이혜원, "센서 데이터를 활용한 딥 러닝 기반 해상 장애물의 추적 방법", 2023년도 한국CDE학회 하계학술발표회, 제주, pp. 12, 2023.08.23-26 file 2023-08-24
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