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조선소 생산 작업 지원을 위한 VR 기반 협업 시뮬레이션에 관한 연구
이성(Xing Li),함승호(Seung-Ho Ham),조로만(Luman Zhao),하솔(Sol Ha),노명일(Myung-Il Roh) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
In shipbuilding production, several types of cranes are simultaneously used to effectively handle a building block which is more than hundred tons. For this, one or more operators operate each crane, and the cooperation among the operators is very important. In the previous studies, the maximum tension of wire ropes of the cranes and motion of the block were analyzed computationally during lifting operation based on fixed scenarios with simulation. This couldn’t reflect the interaction during the operation which can cause unexpected results. Therefore, a collaborative simulation system for production in shipyard was developed in this study. The developed system is comprised of three parts. The first part is an input device which generates signals such as hoisting up and down of the wire ropes of the cranes. The second part is a dynamics engine which receives the signals from several operators and reflects them as a simulation scenario. The last part is a display device which is used to share simulation results between the workers and visualizes the simulation results in multi-views on the network. Finally, the developed system was applied to a block erection process which is operated by three crane operators and one commander. As a result, it is shown that the developed system can be used to simulate or train the collaborative work of the operators in shipyard.
조선 해양 분야 적용을 위한 해석, 하드웨어 및 가시화 기반의 실시간 시뮬레이션 방법
함승호(Seung-Ho Ham),노명일(Myung-Il Roh),이성(Xing Li),조로만(Luman Zhao) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.하계
Recently, interests of ship and offshore simulators are increased for the purpose of design, production, training, engineering, safety assessment, and so on. Basically, three different kinds of technologies are required to develop such simulators in the field of naval architecture and ocean engineering; physics-based analysis, hardware, and virtual reality. In this study, a real-time simulation method based on analysis, hardware, and visualization is proposed. For this, an integrated simulation framework is proposed. To check the applicability of the proposed method, it is applied to motion analysis of a drillship. The result shows that the proposed method can be used for various purposed in the field of naval architecture and ocean engineering.
무인수상정의 기뢰 탐지 임무 수행을 위한 통합 시뮬레이션 방법 연구
이혜원(Hye-Won Lee),노명일(Myung-Il Roh),함승호(Seung-Ho Ham),조로만(Luman Zhao),김낙완(Nak-Wan Kim),하솔(Sol Ha),우주현(Joo-Hyun Woo),정우현(Woo-Hyun Jung),유찬우(Chan-Woo Yu) (사)한국CDE학회 2017 한국CDE학회 논문집 Vol.22 No.3
The USV performs various missions including mine detection and marine reconnaissance and survey unmanned. As the autonomic software for USV takes charge of detection, decision, and command instead of human, the verification and validation (V&V) of the software is highly required at the early design stage. Due to the difficulty of such V&V before the real USV is made, the virtual prototype of USV and ocean space are adopted in this study. For mine detection mission, which is one of the most important mission of USV, four modules are developed and implemented here; scenario management and display module, USV motion analysis module, submarine topography synthesis module, and mine detection module. The mine detection module represents the control algorithm in autonomic software, and the rest of the modules are virtual prototype which represents the ocean space and hardware in USV such as GPS (Global Positioning System) and SSS (Side Scan Sonar). With the virtual prototype modules, the control algorithm in mine detection module is verified. Meanwhile, for the data communication between the modules, the ROS (Robot Operating System) is used. The ROS provides message communication function between the modules, so that each module can transmit and receive data during the simulation. To check the applicability of the proposed method, the mine detection scenario is performed using the virtual prototype of USV and ocean space. The result shows that the proposed method can be effectively used to test and develop the mine detection algorithm of autonomic software in USV.