4.8 Article

Electroadhesion-Based High-Payload Soft Gripper With Mechanically Strengthened Structure

Journal

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 69, Issue 1, Pages 642-651

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3053887

Keywords

Grippers; Actuators; Force; Electrodes; Bending; Fingers; Grasping; Dielectric elastomer (DE); electroadhesion; gripper; robot; soft

Funding

  1. Korea Evaluation Institute of Industrial Technology (KEIT) - Korea government (MOTIE) [10077643]
  2. Alchemist Project of Ministry of Trade, Industry, and Energy [20007014]
  3. R&D Program of the National Research Foundation (NRF), Korea [2019R1A2C2006362]
  4. Korea Evaluation Institute of Industrial Technology (KEIT) [10077643] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  5. National Research Foundation of Korea [2019R1A2C2006362] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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This article proposes a reinforced soft gripper with a mechanically strengthened electroadhesion pad and a multilayered dielectric elastomer (DE) actuator, for practical robotic application. The gripper is able to lift and move objects 100 times heavier than its own mass, and firmly hold objects weighing 16.8 kg with optimized specifications.
This article proposes a reinforced soft gripper with a mechanically strengthened electroadhesion pad and a multilayered dielectric elastomer (DE) actuator, for practical robotic application. The reinforcement of the electroadhesion pad is achieved by a metallic electrode pattern printed on a flexible polyimide film, which has a higher elastic modulus than typical soft materials. Moreover, the multilayered DE actuator is used to increase the bending force of the soft gripper. We maximize the gripper performance by optimizing design factors of the electroadhesion and multilayered DE through experimental and simulation analysis. In this study, we demonstrate dynamic picking up and placing tasks with the designed gripper assembled to a robotic manipulator. The gripper can lift and move various shaped objects 100 times heavier than the gripper's mass of 6.2 g. Moreover, the soft gripper with a large area can firmly hold 16.8 kg, with optimized specifications.

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