Electroadhesion

Electroadhesion is the electrostatic effect of astriction between two surfaces subjected to an electrical field. Applications include the retention of paper on plotter surfaces, astrictive robotic prehension (electrostatic grippers) etc. Clamping pressures in the range of 0.5 to 1.5 N/cm2 (0.8 to 2.3 psi) have been claimed.[1]

An electroadhesive pad consists of conductive electrodes placed upon a polymer substrate. When alternate positive and negative charges are induced on adjacent electrodes, the resulting electric field sets up opposite charges on the surface that the pad touches, and thus causes electrostatic adhesion between the electrodes and the induced charges in the touched surface material.[2]

Electroadhesion can be loosely divided into two basic forms: that which concerns the prehension of electrically conducting materials where the general laws of capacitance hold (D = E ε) and that used with electrically insulating subjects where the more advanced theory of electrostatics (D = E ε + P) applies.[3]

References
  1. "Electroadhesive Surface-Climbing Robots". SRI International. Retrieved 2013-07-01.
  2. "Electroadhesion". SRI International. Retrieved 2014-05-08.
  3. "A brief history of Electroadhesion" (PDF). mechatronics.org. Retrieved 2014-01-06.

Further reading
  • Monkman G.J., Hesse S., Steinmann R. & Schunk H., Robot Grippers, Wiley‐VCH, 2007.
  • Monkman G.J., Electroadhesive Microgrippers, Assembly Automation 30(4), 2003.
  • Monkman G.J., Workpiece Retention during Machine Processing, Assembly Automation 20(1), 2000.
  • Monkman G.J., An Analysis of Astrictive Prehension, International Journal of Robotics Research 16(1), 1997.
  • Monkman G.J., Robot Grippers for use with Fibrous Materials, International Journal of Robotics Research 14(2), 1995.
  • Monkman G.J., Compliant Robotic Devices and Electroadhesion, Robotica 10(2), 1992.
  • Monkman G.J., Taylor P.M. & Farnworth G.J., Principles of Electroadhesion in Clothing Technology, International Journal of Clothing Science & Technology 1(3), 1989.
  • Guo J., et al., Electroadhesion Technologies for Robotics: A Comprehensive Review, IEEE Transactions on Robotics 36(2), 2020.
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