Abstract
Recently, soft grippers have garnered considerable interest in various fields, such as medical rehabilitation, due to their high compliance. However, the traditional PneuNet only reliably grasps medium and large objects via enveloping grasping (EG), and cannot realize pinching grasping (PG) to stably grasp small and thin objects as EG requires a large bending angle whereas PG requires a much smaller one. Therefore, we proposed a multi-structure soft gripper (MSSG) with only one vent per finger which combines the PneuNet in the proximal segment with the normal soft pneumatic actuator (NSPA) in the distal segment, allowing PG to be realized without a loss in EG and enhancing the robustness of PG due to the height difference between the distal and proximal segments. Grasping was characterized on the basis of the stability (finger bending angle describes) and robustness (pull-out force describes), and the bending angle and pull-out force of MSSG were analyzed using the finite element method. Furthermore, the grasping performance was validated using experiments, and the results demonstrated that the MSSG with one vent per finger was able to realize PG without a loss in EG and effectively enhance the PG robustness.
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References
NAPIER J R. The prehensile movements of the human hand [J]. The Journal of Bone and Joint Surgery. British Volume, 1956, 38-B(4): 902–913.
CUTKOSKY M R, WRIGHT P K. Friction, stability and the design of robotic fingers [J]. The International Journal of Robotics Research, 1986, 5(4): 20–37.
FERRARI C, CANNY J. Planning optimal grasps [C]//1992 IEEE International Conference on Robotics and Automation. Nice: IEEE, 1992: 2290–2295.
POLYGERINOS P, LYNE S, WANG Z, et al. Towards a soft pneumatic glove for hand rehabilitation [C]//2013 IEEE/RSJ International Conference on Intelligent Robots and Systems. Tokyo: IEEE, 2013, 1512–1517.
TEEPLE C B, KOUTROS T N, GRAULE M A, et al. Multi-segment soft robotic fingers enable robust precision grasping [J]. The International Journal of Robotics Research, 2020, 39(14): 1647–1667.
LIU S, WANG F, LIU Z, et al. A two-finger soft-robotic gripper with enveloping and pinching grasping modes [J]. IEEE/ASME Transactions on Mechatronics, 2021, 26(1): 146–155.
LU Q, WANG J, ZHANG Z, et al. An underactuated gripper based on car differentials for self-adaptive grasping with passive disturbance rejection [C]//2021 IEEE International Conference on Robotics and Automation. Xi’an: IEEE, 2021: 2605–2611.
SUN Y, SONG Y S, PAIK J. Characterization of silicone rubber based soft pneumatic actuators [C]//2013 IEEE/RSJ International Conference on Intelligent Robots and Systems. Tokyo: IEEE, 2013, 4446–4453.
HUANG J, XIE G, LIU Z. Finite element analysis of super-elastic rubber materials based on the Mooney-Rivlin and Yeoh model [J]. China Rubber/Plastics Technology and Equipment, 2008, 34(12): 22–26 (in Chinese).
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Foundation item: the National Key Research and Development Program of China (No. 2020YFB1313100)
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Li, L., Gao, F., Zheng, X. et al. Enhancement of Pinching Grasping Robustness Using a Multi-Structure Soft Gripper. J. Shanghai Jiaotong Univ. (Sci.) 28, 307–311 (2023). https://doi.org/10.1007/s12204-022-2508-4
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DOI: https://doi.org/10.1007/s12204-022-2508-4