Background This paper presents an intelligent path planner for lifting tasks by tower cranes in highly complex environments,such as old industrial plants that were built many decades ago and sites used as tentative st...Background This paper presents an intelligent path planner for lifting tasks by tower cranes in highly complex environments,such as old industrial plants that were built many decades ago and sites used as tentative storage spaces.Generally,these environments do not have workable digital models and 3 D representations are impractical.Methods The current investigation introduces the use of cutting edge laser scanning technology to convert real environments into virtualized versions of the construction sites or plants in the form of point clouds.The challenge is in dealing with the large point cloud datasets from the multiple scans needed to produce a complete virtualized model.The tower crane is also virtualized for the purpose of path planning.A parallelized genetic algorithm is employed to achieve intelligent path planning for the lifting task performed by tower cranes in complicated environments taking advantage of graphics processing unit technology,which has high computing performance yet low cost.Results Optimal lifting paths are generate d in several seconds.展开更多
随着海洋开发的深入,目前市场需要更多的带动力定位(Dynamic Positioning,DP)系统的起重船,使得吊装工程业主方对DP模式下船舶的定位能力提出了越来越高的要求。国外某系统服务商已开发出动力定位模式下的吊重软件(DP Heavy Lift)及配...随着海洋开发的深入,目前市场需要更多的带动力定位(Dynamic Positioning,DP)系统的起重船,使得吊装工程业主方对DP模式下船舶的定位能力提出了越来越高的要求。国外某系统服务商已开发出动力定位模式下的吊重软件(DP Heavy Lift)及配套设备。因此,将重点说明一艘国内某型起重船在海上进行DP Heavy Lift试验的组织与实施,希望对后续同类型项目的 DP Heavy Lift海上试验具有一定的借鉴意义。展开更多
文摘Background This paper presents an intelligent path planner for lifting tasks by tower cranes in highly complex environments,such as old industrial plants that were built many decades ago and sites used as tentative storage spaces.Generally,these environments do not have workable digital models and 3 D representations are impractical.Methods The current investigation introduces the use of cutting edge laser scanning technology to convert real environments into virtualized versions of the construction sites or plants in the form of point clouds.The challenge is in dealing with the large point cloud datasets from the multiple scans needed to produce a complete virtualized model.The tower crane is also virtualized for the purpose of path planning.A parallelized genetic algorithm is employed to achieve intelligent path planning for the lifting task performed by tower cranes in complicated environments taking advantage of graphics processing unit technology,which has high computing performance yet low cost.Results Optimal lifting paths are generate d in several seconds.
文摘随着海洋开发的深入,目前市场需要更多的带动力定位(Dynamic Positioning,DP)系统的起重船,使得吊装工程业主方对DP模式下船舶的定位能力提出了越来越高的要求。国外某系统服务商已开发出动力定位模式下的吊重软件(DP Heavy Lift)及配套设备。因此,将重点说明一艘国内某型起重船在海上进行DP Heavy Lift试验的组织与实施,希望对后续同类型项目的 DP Heavy Lift海上试验具有一定的借鉴意义。
