Time-dependent electroadhesive force degradation

Rui Chen*, Zhuo Zhang, Ruizhou Song, Cheng Fang, Dirk Sindersberger, Gareth J. Monkman, Jianglong Guo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


This paper concerns a comprehensive investigation of time-dependent electroadhesion (EA) force degradation. EA shear force tests on different object materials (a PET, glass, ABS, and wood plate) have shown that force degradation was dominated by residual polarization charges trapped in the EA pad dielectric rather than in the substrate dielectric from which the object to be prehended is made. In order to explain this dynamic physical phenomenon, a model of dielectric polarization and depolarization has been proposed. According to the derived relationship between EA force and discharge time, three different methods intended to mitigate this problem has been compared: (1) the natural discharge method, (2) the high voltage resistor discharge method, and (3) the discharge prior to field polarity reversal method. These methods are useful for generating repeatable and stable EA forces, which are required for the characterization of EA pads and their subsequent employment in material handling, mobile robot crawling and climbing tasks.

Original languageEnglish
Article number055009
JournalSmart Materials and Structures
Issue number5
Number of pages9
Publication statusPublished - 26. Mar 2020


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