软体机械臂水下自适应鲁棒视觉伺服

徐璠; 王贺升

doi:10.16383/j.aas.c200457

软体机械臂水下自适应鲁棒视觉伺服

doi: 10.16383/j.aas.c200457

徐璠^1,,
王贺升^1,

1.
上海交通大学自动化系上海 201900

基金项目: 国家自然科学基金(62073222, 61722309)资助

详细信息

作者简介:
徐璠：上海交通大学自动化系博士研究生. 主要研究方向为软体机器人, 视觉伺服. E-mail: xufan_1993@sjtu.edu.cn

王贺升：上海交通大学自动化系教授.主要研究方向为视觉伺服, 服务机器人, 机器人控制, 自动驾驶.本文通信作者. E-mail: wanghesheng@sjtu.edu.cn

计量
- 文章访问数: 162
- HTML全文浏览量: 44
- 被引次数: 0
出版历程
- 网络出版日期: 2020-12-21

Adaptive Robust Visual Servoing Control of A Soft Manipulator in Underwater Environment

XU Fan^1
,,
WANG He-Sheng^1
,

1.
Department of Automation, Shanghai Jiao Tong University, Shanghai 201900

Funds: Supported by National Natural Science Foundation of P. R. China (62073222, 61722309)

摘要

摘要: 水下仿生软体机器人在水底环境勘测, 水下生物观测等方面具有极高的应用价值. 本文为进一步提升仿章鱼臂软体机器人在特殊水下环境中控制效果, 提出一种自适应鲁棒视觉伺服控制方法, 实现其在干扰无标定环境中的高精度镇定控制. 本文基于水底动力学模型, 设计保证动力学稳定的控制器; 针对柔性材料离线标定过程繁琐成本高, 提出料参数自适应估计算法; 针对水下特殊工作条件, 设计自适应鲁棒视觉伺服控制器, 实现折射效应的在线补偿, 并通过自适应未知环境干扰上界, 避免先验环境信息的求解. 所提算法在软体机器人样机中验证其镇定控制性能, 为仿生软体机器人的实际应用提供理论基础.
- 软体机器人 /
- 自适应鲁棒控制 /
- 无标定视觉伺服 /
- 水下视觉伺服
Abstract: Underwater bioinspired soft robots enjoy high applicability in underwater exploring, biology observing, etc. This paper proposes an adaptive robust controller to improve the performance of the octopus-inspired soft robot in underwater environment and to realize accurate positioning control in the uncalibrated environment with disturbances. The paper designed a dynamically stable controller based on the underwater dynamic model. Considering the high-costing and tedious offline identification of soft material parameters, the paper proposed an adaptive method to estimate the unknowns. Considering the special underwater working condition, the paper proposed an adaptive robust visual servo controller, which can online compensate for refraction effect and avoid solving prior environment information by estimating unknown upper bound of environment disturbances. The proposed algorithm was experimentally validated its performance in a soft robot prototype, serving as a theoretical basis of applications of bioinspired soft robots.
- Soft robot /
- adaptive robust control /
- uncalibrated visual servoing /
- underwater visual servoing

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图 1 (a) 仿章鱼臂软体机械臂; (b) 离散化虚拟关节机构示意图

Fig. 1 (a) Octopus tentacle-inspired soft manipulator; (b) Sketch of discretized virtual section

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图 2 水下相机模型

Fig. 2 Underwater camera model

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图 3 控制器简图

Fig. 3 Block diagram of the controller

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图 4 实验设置

Fig. 4 Experiment setup

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图 5 图像误差收敛过程曲线

Fig. 5 Converging process of image error.

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图 6 图像轨迹曲线

Fig. 6 Image trajectory curve

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图 7 3D轨迹曲线

Fig. 7 3D trajectory curve

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图 8 ${\hat \chi _D}$中未知参数$\hat E$和未知干扰上界$\hat \theta $的收敛过程曲线

Fig. 8 Converging process of estimated parameters in ${\hat \chi _D}$ and of $\hat \theta $.

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图 9 ${\hat \chi _C}$中未知参数的收敛过程曲线

Fig. 9 Converging process of estimated parameters in ${\hat \chi _C}$

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