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基于分步迁移策略的苹果采摘机械臂轨迹规划方法 被引量:10
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作者 郑嫦娥 高坡 +2 位作者 GAN Hao 田野 赵燕东 《农业机械学报》 EI CAS CSCD 北大核心 2020年第12期15-23,共9页
针对非结构化自然环境使基于深度强化学习的采摘轨迹规划训练效率低的问题,提出了基于分步迁移策略的深度确定性策略梯度算法(DDPG),并进行了苹果采摘轨迹规划。首先,提出了基于DDPG的渐进空间约束分步训练策略;其次,利用迁移学习思想,... 针对非结构化自然环境使基于深度强化学习的采摘轨迹规划训练效率低的问题,提出了基于分步迁移策略的深度确定性策略梯度算法(DDPG),并进行了苹果采摘轨迹规划。首先,提出了基于DDPG的渐进空间约束分步训练策略;其次,利用迁移学习思想,将轨迹规划的最优策略由无障碍场景迁移到单一障碍场景、由单一障碍场景迁移到混杂障碍场景;最后,对多自由度苹果采摘机械臂进行了采摘轨迹规划仿真实验,结果表明,分步迁移策略能够提高DDPG算法的训练效率与网络性能,仿真实验验证了本文方法的有效性。 展开更多
关键词 苹果 采摘机械臂 轨迹规划 深度确定性策略梯度算法 迁移学习
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DEVELOPMENT AND MOTION ANALYSIS OF MINIATURE WHEEL-TRACK-LEGGED MOBILE ROBOT 被引量:11
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作者 DUAN Xingguang HUANG Qiang +2 位作者 XU Yan RAHMAN N zheng change 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第3期24-28,共5页
A miniature wheel-track-legged mobile robot to carry out military and civilian missions in both indoor and outdoor environments is presented. Firstly, the mechanical design is discussed, which consists of four wheeled... A miniature wheel-track-legged mobile robot to carry out military and civilian missions in both indoor and outdoor environments is presented. Firstly, the mechanical design is discussed, which consists of four wheeled and four independently controlled tracked arms, embedded control system and teleoperation. Then the locomotion modes of the mobile robot and motion analysis are analyzed. The mobile robot can move using wheeled, tracked and legged modes, and it has the characteristics of posture-recovering, high mobility, small size and light weight. Finally, the effectiveness of the deve-loped mobile robot is confirmed by experiments such as posture recovering when tipped over, climb-ing stairs and traversing the high step. 展开更多
关键词 Mobile robot Locomotion modes STAIR-CLIMBING Posture recovery
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