鉴于增材制造技术中的材料挤出工艺操作方便、节省材料,而目前国内外对该工艺打印功能梯度材料的路径规划策略研究较少,对材料挤出工艺材料组分转变时的延迟现象进行分析,将延迟分为交付延迟和过渡延迟,并提出基于偏移距离对延迟现象进...鉴于增材制造技术中的材料挤出工艺操作方便、节省材料,而目前国内外对该工艺打印功能梯度材料的路径规划策略研究较少,对材料挤出工艺材料组分转变时的延迟现象进行分析,将延迟分为交付延迟和过渡延迟,并提出基于偏移距离对延迟现象进行补偿的打印策略。以Visual Studio 2019为开发平台提出一种自动生成任意功能梯度材料打印路径的新路径规划策略,该策略考虑了每层切片内材料组分的变化,针对不同变化方向生成相应的填充路径,以确保打印过程中的材料组分变化最小,从而提高成型件的材料精度。对多个功能梯度模型进行仿真演示,将生成的打印路径采用OpenGL可视化分析其材料组分误差,并通过实验验证了路径规划策略的正确性。展开更多
The utilization of biomimicry of bacterial foraging strategy was considered to develop an adaptive control strategy for mobile robot, and a bacterial foraging approach was proposed for robot path planning. In the prop...The utilization of biomimicry of bacterial foraging strategy was considered to develop an adaptive control strategy for mobile robot, and a bacterial foraging approach was proposed for robot path planning. In the proposed model, robot that mimics the behavior of bacteria is able to determine an optimal collision-free path between a start and a target point in the environment surrounded by obstacles. In the simulation, two test scenarios of static environment with different number obstacles were adopted to evaluate the performance of the proposed method. Simulation results show that the robot which reflects the bacterial foraging behavior can adapt to complex environments in the planned trajectories with both satisfactory accuracy and stability.展开更多
文摘鉴于增材制造技术中的材料挤出工艺操作方便、节省材料,而目前国内外对该工艺打印功能梯度材料的路径规划策略研究较少,对材料挤出工艺材料组分转变时的延迟现象进行分析,将延迟分为交付延迟和过渡延迟,并提出基于偏移距离对延迟现象进行补偿的打印策略。以Visual Studio 2019为开发平台提出一种自动生成任意功能梯度材料打印路径的新路径规划策略,该策略考虑了每层切片内材料组分的变化,针对不同变化方向生成相应的填充路径,以确保打印过程中的材料组分变化最小,从而提高成型件的材料精度。对多个功能梯度模型进行仿真演示,将生成的打印路径采用OpenGL可视化分析其材料组分误差,并通过实验验证了路径规划策略的正确性。
基金Project(61173032)supported by the National Natural Science Foundation of ChinaProject(20090406)supported by the Tianjin Scientific and Technological Development Fund of Higher Education of China
文摘The utilization of biomimicry of bacterial foraging strategy was considered to develop an adaptive control strategy for mobile robot, and a bacterial foraging approach was proposed for robot path planning. In the proposed model, robot that mimics the behavior of bacteria is able to determine an optimal collision-free path between a start and a target point in the environment surrounded by obstacles. In the simulation, two test scenarios of static environment with different number obstacles were adopted to evaluate the performance of the proposed method. Simulation results show that the robot which reflects the bacterial foraging behavior can adapt to complex environments in the planned trajectories with both satisfactory accuracy and stability.