轻量化机械手实现空中机器人多向停靠与抓取,单电机驱动自适应形变。
Adaptive Perching and Grasping by Aerial Robot with Light-weight and High Grip-force Tendon-driven Three-fingered Hand using Single Actuator
- 单电机驱动三指腱传动手,通过柔性结构实现自适应抓握
- 实验验证可承重27.5公斤,成功抓取复杂形状工具
- 新方法支持侧向停靠、稳定脱离与重新起飞,适合复杂环境
以往研究中,配备停靠机构的飞行机器人虽能延长工作时间,但多数仅支持上下方向停靠,难以在有障碍物的墙边作业。此外,传统停靠手功能单一,且增加飞行负载。本文提出一种轻量级机械手「Tri-force hand」,兼具停靠与抓取功能,并设计新型「摆动式停靠」方法。该手为腱驱动三指结构,采用球铰与二维差速板,仅用单个执行器即可实现被动驱动。每个手指模块具备可控半腱驱动,可在工作范围内贴合任意形状,实现自适应停靠与抓取。将该手集成于全驱动飞行机器人后,系统可从侧方多方向接近并利用重力着陆。该方法类似固定翼机器人的压紧式停靠,但具备更优的速度与方向控制能力,且可稳定脱离与重新起飞。实验表明,所制备的Tri-force手最大承重达27.5公斤,能有效抓取从简单到复杂形状的工具,并在停靠与起飞任务中取得高成功率。
原文摘要 · Abstract (English)
In previous research, various types of aerial robots equipped with perching mechanisms have been developed to extend operational time. However, most existing perching methods adopt either an upward or downward approach, making it difficult to perch near walls with surrounding obstacles. Additionally, perching hands are typically designed solely for attachment to objects and lack additional functionality, imposing a payload burden during flight. To address these issues, this paper proposes a lightweight robotic hand, the "Tri-force hand", capable of both perching and object grasping, as well as a new perching method called "Pendulum-perching". The Tri-force hand is a tendon-driven, three-fingered hand utilizing a spherical joint and a two-dimensional differential plate, enabling passive actuation with a single actuator. Each finger module, designed with controllable semi-tendon drive, can conform to arbitrary shapes within its operating range, allowing both perching and adaptive object grasping. By integrating this hand into a fully actuated aerial robot, the system can perform multi-directional approaches from the side and landing using gravity. This approach is similar to Crush-perching seen in researches with fixed-wing aerial robots, but it differs in its superior control over approach speed and direction, as well as its ability to achieve stable detachment and re-launch. In experiments, the fabricated Tri-force hand demonstrated the ability to withstand a total weight of up to 27.5 kg, grasp various objects ranging from simple to complex-shaped tools, and achieve a high success rate in both perching and takeoff.
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