Science China Technological Sciences

, Volume 62, Issue 1, pp 31–38 | Cite as

A soft gripper of fast speed and low energy consumption

  • YuZhe Wang
  • Ujjaval Gupta
  • Nachiket Parulekar
  • Jian ZhuEmail author


Grasping of complicated objects is an active research area which is developing fast throughout the years. Soft grippers can be an effective solution, since they are capable of holding workpieces of various shapes and interacting with unstructured environments effectively. Soft grippers generally consist of soft, flexible and compliant materials, which are able to conform to the shape of the object so that the gripper will not deform or bruise the soft object. Fast grasping of objects with various sizes and shapes remains a challenging task for soft grippers. In the present article, a soft gripper based on bi-stable dielectric elastomer actuator (DEA) inspired by the insect-catching ability of the Venus flytrap, is designed. This soft gripper can achieve good performances in grasping various objects by a simple actuation system. The gripper can switch from one stable state to another when subject to an impulse voltage of 0.04 s. The time duration for each grasping action is 0.17 s, and no continuous voltage is required for holding the gripped object. Thus, energy consumption can be achieved as low as 0.1386 J per grasping action. The mechanism of achieving bi-stable states is related to the duration of impulse voltage applied and the resonant frequency of the structure. The present study demonstrates that bi-stable dielectric elastomer actuators are capable of achieving fast speed for grasping with very low energy consumption, which is significant in the applications to soft grippers and biomimetic robots.


soft gripper dielectric elastomer fast speed bi-stable low energy consumption 


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  1. 1.
    Hughes J, Culha U, Giardina F, et al. Soft manipulators and grippers: A review. Front Robot AI, 2016, 3: 69CrossRefGoogle Scholar
  2. 2.
    Tai K, El-Sayed A R, Shahriari M, et al. State of the art robotic grippers and applications. Robotics, 2016, 5: 11CrossRefGoogle Scholar
  3. 3.
    Krüger J, Lien T K, Verl A. Cooperation of human and machines in assembly lines. CIRP Ann, 2009, 58: 628–646CrossRefGoogle Scholar
  4. 4.
    Bertelsen A, Melo J, Sánchez E, et al. A review of surgical robots for spinal interventions. Int J Med Robotics Comput Assist Surg, 2013, 9: 407–422CrossRefGoogle Scholar
  5. 5.
    Hirzinger G, Brunner B, Landzettel K, et al. Preparing a new generation of space robots-A survey of research at DLR. Robotics Auton Syst, 1998, 23: 99–106CrossRefGoogle Scholar
  6. 6.
    Pettersson A, Ohlsson T, Davis S, et al. A hygienically designed force gripper for flexible handling of variable and easily damaged natural food products. Innovative Food Sci Emerging Technologies, 2011, 12: 344–351CrossRefGoogle Scholar
  7. 7.
    Tanigaki K, Fujiura T, Akase A, et al. Cherry-harvesting robot. Comput Electron Agric, 2008, 63: 65–72CrossRefGoogle Scholar
  8. 8.
    Craig J J, Hsu P, Sastry S S. Adaptive control of mechanical manipulators. Int J Robotics Res, 1987, 6: 16–28CrossRefGoogle Scholar
  9. 9.
    Henrich D, Worn H. Robot Manipulation of Deformable Objects. London: Springer, 2000CrossRefGoogle Scholar
  10. 10.
    Lin H, Guo F, Wang F, et al. Picking up a soft 3D object by “feeling” the grip. Int J Robotics Res, 2015, 34: 1361–1384CrossRefGoogle Scholar
  11. 11.
    Clavel R. DELTA, a Fast robot with parallel geometry. In: Proceedings of the 18th international symposium on industrial robots. Lausanne, 1988. 91–100Google Scholar
  12. 12.
    Kenaley G L and Cutkosky M R. Electrorheological fluid-based robotic fingers with tactile sensing. In: Proceedings of the 1989 International Conference on Robotics and Automation. IEEE, 1989. 132–136CrossRefGoogle Scholar
  13. 13.
    Monkman G J. Compliant robotic devices, and electroadhesion. Robotica, 1992, 10: 183CrossRefGoogle Scholar
  14. 14.
    Monkman G J, Taylor P M. Memory foams for robot grippers. In: Proceedings of the Fifth International Conference on Advanced Robotics’ Robots in Unstructured Environments. IEEE, 1991. 339–342CrossRefGoogle Scholar
  15. 15.
    Kim S, Laschi C, Trimmer B. Soft robotics: A bioinspired evolution in robotics. Trends Biotech, 2013, 31: 287–294CrossRefGoogle Scholar
  16. 16.
    Scala J, Iott K, Schwab D W, et al. Digestive secretion of dionaea muscipula (Venus’s Flytrap). Plant Physiol, 1969, 44: 367–371CrossRefGoogle Scholar
  17. 17.
    Xu L, Gu G. Bioinspired Venus flytrap: A dielectric elastomer actuated soft gripper. In: Proceedings of the 2017 24th International Conference on Mechatronics and Machine Vision in Practice (M2VIP). IEEE, 2017. 1–3Google Scholar
  18. 18.
    Shi L, Guo S. Development and evaluation of a Venus flytrap-inspired microrobot. Microsyst Technol, 2016, 22: 1949–1958CrossRefGoogle Scholar
  19. 19.
    Santer M, Pellegrino S. Compliant multistable structural elements. Int J Solids Struct, 2008, 45: 6190–6204MathSciNetCrossRefzbMATHGoogle Scholar
  20. 20.
    Hong W, Zhao X, Suo Z. Drying-induced bifurcation in a hydrogelactuated nanostructure. J Appl Phys, 2008, 104: 084905CrossRefGoogle Scholar
  21. 21.
    Zhao J, Niu J, McCoul D, et al. Improvement on output torque of dielectric elastomer minimum energy structures. Appl Phys Lett, 2015, 107: 063505CrossRefGoogle Scholar
  22. 22.
    Zhao J, Wang S, McCoul D, et al. Bistable dielectric elastomer minimum energy structures. Smart Mater Struct, 2016, 25: 075016CrossRefGoogle Scholar
  23. 23.
    Yap H K, Ng H Y, Yeow C H. High-force soft printable pneumatics for soft robotic applications. Soft Robotics, 2016, 3: 144–158CrossRefGoogle Scholar
  24. 24.
    Dohta S, Shinohara T, Matsushita H. Development of a pneumatic rubber hand. Proc JFPS Int Symposium Fluid Power, 2002, 2002: 49–54CrossRefGoogle Scholar
  25. 25.
    Krahn J M, Fabbro F, Menon C. A soft-touch gripper for grasping delicate objects. IEEE/ASME Trans Mechatron, 2017, 22: 1276–1286CrossRefGoogle Scholar
  26. 26.
    Paek J, Cho I, Kim J. Microrobotic tentacles with spiral bending capability based on shape-engineered elastomeric microtubes. Sci Rep, 2015, 5: 10768CrossRefGoogle Scholar
  27. 27.
    Shintake J, Rosset S, Schubert B, et al. Versatile soft grippers with intrinsic electroadhesion based on multifunctional polymer actuators. Adv Mater, 2016, 28: 231–238CrossRefGoogle Scholar
  28. 28.
    Lau G K, Heng K R, Ahmed A S, et al. Dielectric elastomer fingers for versatile grasping and nimble pinching. Appl Phys Lett, 2017, 110: 182906CrossRefGoogle Scholar
  29. 29.
    Imamura H, Kadooka K, Taya M. A variable stiffness dielectric elastomer actuator based on electrostatic chucking. Soft Matter, 2017, 13: 3440–3448CrossRefGoogle Scholar
  30. 30.
    Jain R K, Datta S, Majumder S, et al. Two IPMC fingers based micro gripper for handling. Int J Adv Robotic Syst, 2011, 8: 13CrossRefGoogle Scholar
  31. 31.
    Bar-Cohen Y, Xue T, Shahinpoor M, et al. Flexible, low-mass robotic arm actuated by electroactive polymers. In: Proceedings of the SPIE’s 5th Annual International Symposium on Smart Structures and Materials. San Diego, 1998. 3329–07Google Scholar
  32. 32.
    Jin H, Dong E, Xu M, et al. Soft and smart modular structures actuated by shape memory alloy (SMA) wires as tentacles of soft robots. Smart Mater Struct, 2016, 25: 085026CrossRefGoogle Scholar
  33. 33.
    She Y, Li C, Cleary J, et al. Design and fabrication of a soft robotic hand with embedded actuators and sensors. J Mech Robotics, 2015, 7: 021007CrossRefGoogle Scholar
  34. 34.
    Shintake J, Schubert B, Rosset S, et al. Variable stiffness actuator for soft robotics using dielectric elastomer and low-melting-point alloy. In: Proceedings of the 2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). Hamburg: IEEE, 2015. 1097–102CrossRefGoogle Scholar
  35. 35.
    Yang Y, Chen Y, Li Y, et al. Novel variable-stiffness robotic fingers with built-in position feedback. Soft Robotics, 2017, 4: 338–352CrossRefGoogle Scholar
  36. 36.
    McCoul D, Rosset S, Besse N, et al. Multifunctional shape memory electrodes for dielectric elastomer actuators enabling high holding force and low-voltage multisegment addressing. Smart Mater Struct, 2016, 26: 025015CrossRefGoogle Scholar
  37. 37.
    Miriyev A, Stack K, Lipson H. Soft material for soft actuators. Nat Commun, 2017, 8: 596CrossRefGoogle Scholar
  38. 38.
    Shintake J, Cacucciolo V, Floreano D, et al. Soft robotic grippers. Adv Mater, 2018, 30: 1707035CrossRefGoogle Scholar

Copyright information

© Science in China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • YuZhe Wang
    • 1
  • Ujjaval Gupta
    • 1
  • Nachiket Parulekar
    • 1
    • 2
  • Jian Zhu
    • 1
    Email author
  1. 1.Department of Mechanical EngineeringNational University of SingaporeSingaporeSingapore
  2. 2.School of Mechanical SciencesIndian Institute of Technology BhubaneswarBhubaneswarIndia

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