果园机器人AGV避障路径视觉反馈纠偏控制算法Visual Feedback Rectification Control Algorithm for Obstacle Avoidance Path of Orchard Robot AGV
郭晶晶,陈欢欢
摘要(Abstract):
果园非结构化作业环境中,因光照剧变、地表不平及障碍物随机分布会引发自动导引车视觉导航映射失准,使得难以获取横纵向避障轨迹的转向角与速度纠偏量,导致动态纠偏控制滞后。为此,提出融合视觉反馈与惩罚机制的果园机器人AGV避障路径纠偏控制算法。通过建立机器人位姿向量与切向速度、角速度之间的运动学映射关系,构建视觉反馈偏差模型,并分别定义横向位置偏差与方向角度偏差,引入卡尔曼滤波对偏差量进行最优估计与更新,有效抑制果园光影噪声干扰。在路径规划阶段,设计基于障碍物距离的惩罚因子,淘汰近障不安全路径,生成融合综合路径偏离度的最安全路径长度,以安全路径长度为基准,综合路径安全衰减系数,得到AGV的转向角纠偏量与速度纠偏量,结合时间衰减因子实时修正AGV的转向角与速度纠偏量,实现行进过程中的动态平滑纠偏控制。实验数据证明,该方法在角度与距离偏差计算中与实际值高度吻合,在避障轨迹规划中有效远离障碍物安全边界,关节角度控制曲线与期望轨迹一致性强,验证了所提算法在感知精度、路径安全性与控制实时性方面的综合优势。
关键词(KeyWords): 果园机器人;AGV避障路径;惩罚因子;视觉反馈纠偏控制;衰减因子
基金项目(Foundation): 郑州市社会科学调研课题—郑州市智慧养老服务体系优化路径研究(ZSJX20250387)
作者(Author): 郭晶晶,陈欢欢
DOI: 10.19356/j.cnki.1001-3997.20260402.022
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