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arXiv 2311.02454cs.RO
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使用抗扭转应变限制层增强 Pneu-net 执行器的性能

Enhancing the Performance of Pneu-net Actuators Using a Torsion Resistant Strain Limiting Layer

University of Washington(华盛顿大学);Northeastern University(东北大学)

Ian Sullivan Good, Srivatsan Balaji, Jeffrey Ian Lipton

AI总结:

针对 Pneu-net 夹持器易滑脱、载荷有限的问题,本文提出抗扭转应变限制层 TRL,通过仿真与实验验证其可显著抑制平面外弯曲并提升夹持力、刚度与抓取能力。

摘要:

Pneu-net 是软体机器人夹持器的主要形式。限制其更广泛采用的一个关键问题是,由于物体从夹持中滑脱,它们无法抓取更大的有效载荷。我们通过引入一种抗扭转应变限制层(TRL)克服了这一限制。该层可减少平面外弯曲,同时保持夹持器的柔软性和平面内柔性。我们利用仿真和实验表征了 Pneu-net 夹持器应变限制层的设计空间,并绘制了弯曲角度与相对夹持强度的映射关系。我们发现,与来自 Soft Robotics Toolkit 的基准 Pneu-net 夹持器相比,使用我们的 TRL 在测试中可将平面外弯曲最多降低 97.7%。我们展示了使用 TRL 加载时 5kg 的提升能力。我们还观察到,在相同压力下,与不含 TRL 的 Pneu-net 夹持器的 1N 峰值夹持力和 150N/m 刚度相比,其峰值夹持力相对提升 3N、刚度相对提升 1200N/m。最后,我们在六个 YCB 对象组成的一组对象上测试了 TRL 夹持器,这些对象超出了传统 Pneu-net 夹持器所展示的能力。结果显示除一个对象外全部成功,表明能力显著增强。

英文摘要:

Pneunets are the primary form of soft robotic grippers. A key limitation to their wider adoption is their inability to grasp larger payloads due to objects slipping out of grasps. We have overcome this limitation by introducing a torsionally rigid strain limiting layer (TRL). This reduces out-of-plane bending while maintaining the gripper's softness and in-plane flexibility. We characterize the design space of the strain limiting layer for a Pneu-net gripper using simulation and experiment and map bending angle and relative grip strength. We found that the use of our TRL reduced out-of-plane bending by up to 97.7% in testing compared to a benchmark Pneu-net gripper from the Soft Robotics Toolkit. We demonstrate a lifting capacity of 5kg when loading using the TRL. We also see a relative improvement in peak grip force of 3N and stiffness of 1200N/m compared to 1N and 150N/m for a Pneu-net gripper without our TRL at equal pressures. Finally, we test the TRL gripper on a suite of six YCB objects above the demonstrated capability of a traditional Pneu-net gripper. We show success on all but one demonstrating significant increased capabilities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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